Match the following terms describing electrical events with the correct phases of the cardiac cycle.
Question Selected Match
The ventricular muscle cells depolarize at the start of this phase.
During this phase, Na+ entry through the funny channels causes the pacemaker potential of SA nodal cells to gradually become less negative until it reaches threshold.
The ventricular muscle cells repolarize right before this phase.
The cytosolic concentration of calcium in the contractile cells of the ventricle is highest during this phase.
All Answer Choices
A. isovolumetric contraction
B. ventricular ejection
C. ventricular filling
D. isovolumetric relaxation
Answers
Answer:
1. Isovolumetric contraction.
2. Ventricular filling.
3. Isovolumetric relaxation.
4. Ventricular ejection.
Explanation:
In Human anatomy, cardiac cycle can be defined as a complete heartbeat of the human heart which comprises of sequential alternating contraction and relaxation of the atria and ventricles, therefore causing blood to flow unidirectionally (one direction) throughout the human body.
Generally, the cardiac cycle occurs in two (2) stages;
Diastole : in this stage, the ventricles is relaxed and would be filled with blood.
Systole: at this stage, the muscles contracts and thus, allow blood to be pushed through the atria.
The following terms describe the electrical events with the correct phases of the cardiac cycle in mammals (human beings);
1. Isovolumetric contraction: The ventricular muscle cells depolarize at the start of this phase. During this phase, the pressure in the atria is lower than the pressure in the ventricles while the pressure in the arteries is higher than the pressure in the ventricles.
2. Ventricular filling: During this phase, Na+ entry through the funny channels causes the pacemaker potential of SA nodal cells to gradually become less negative until it reaches threshold. It causes the atria to contract at the end of the phase.
3. Isovolumetric relaxation: The ventricular muscle cells repolarize right before this phase. During this phase, all of the four (4) cardiac valves are closed while all of the four (4) chambers are relaxed.
4. Ventricular ejection: The cytosolic concentration of calcium in the contractile cells of the ventricle is highest during this phase. Also, the atrioventricular (AV) valves are closed while the semilunar valves are open.
Related Questions
If a person had not drunk any water for 8 hours before collecting a sample, would you expect his/her urine to have a high or low specific gravity? Why?
Answers
Answer:
The person’s urine will have a high specific gravity
Explanation:
A high specific gravity is characterized by an increased concentration of solutes in the urine of am individual. A low specific gravity is characterized by a low or decreased concentration of the solutes.This is usually due to dehydration as a result of environmental conditions or tedious physical activities.
This explains why a person who had not drank any water for 8 hours and is dehydrated before collecting a sample is thought to have a urine with a high specific gravity
Mr. and Mrs. John have six children. Three of them have attached carlobes (recessive) like their father, and the other three have free earlobes like their mother. What are the genotypes of Mr. and Mrs. Jones and of their numerous offspring?
Answers
Answer:
Mr. Johnson has an ee genotype
Mrs. Johnson has an Ee genotype
3 of the kids have an ee genotype, while the other three have an Ee genotype
Explanation:
Since no letter was given for the specified traits, I picked the letter E to explain the genotypes above.
Since the dad is said to have the recessive version, we can conclude that his genotype is ee.
As for the mother, since 3 of the 6 kids are said to have the recessive ear trait like their father, she must be a carrier of the recessive gene (e); therefore, her genotype is Ee.
When making a punnet square, the possible genotypes of their children are Ee or ee.
The children with the free earlobes, like their mother, have a genotype of Ee, while the other three children with attached earlobes have a genotype of ee, like their father.
The enzyme present in saliva
Answers
Answer:
Amylase
Explanation:
Saliva contains special enzymes that help digest the starches in your food. An enzyme called amylase breaks down starches (complex carbohydrates) into sugars, which your body can more easily absorb. Saliva also contains an enzyme called lingual lipase, which breaks down fats.
We know that children learn about "gender roles" very early on in life. How do the following contexts powerfully affect children's gender typing?
(a) communication and interaction between parents and children
(b) communication and interaction between teachers and children
(c) communication and interaction between peers—powerfully affect children’s gender typing
Answers
(a) Communication and interaction between parents and children can powerfully affect children's gender typing by providing them with early examples of gender-specific behaviors and attitudes. Parents can also reinforce or challenge traditional gender roles through the language they use, the activities they engage in, and the expectations they have for their children.
(b) Communication and interaction between teachers and children can also powerfully affect children's gender typing. Teachers can serve as role models for children, and their attitudes and behaviors towards gender can influence children's perceptions of gender roles. Additionally, teachers can also shape children's understanding of gender roles through the curriculum and activities they choose, and the way they interact with and respond to children of different genders.
(c) Communication and interaction between peers can also powerfully affect children's gender typing. Children often look to their peers for cues on how to behave, and the attitudes and behaviors of their peers can influence their understanding of gender roles. Additionally, children can also learn about gender roles through the way they interact with their peers, such as through play and other social interactions.
5. Differentiate between:
a. Scientific study and general study
Answers
Has anyone done the How do males and females skeleton differ work sheet if so let me know. :)
Answers
WOMEN AND MEN HAVE THE SAME NUMBER OF RIBS. We have 12 pairs, though some people are born with 11 or 13 pairs to no ill effect.
MEN HAVE BIGGER HEADS AND LONGER ARMS AND LEGS than women, relative to body size. Sources differ on comparative limb length but they all agree women have smaller, lighter heads & necks. Did you know a human head weighs about 5kg?
The biological sex of an adult skeleton can be determined with 95% accuracy by measuring the hip bones alone, 83% accuracy by the skull, and 80% accuracy by the long bones (femur & tibia).
WOMENS ELBOWS AND SHOULDERS are slightly different from men’s. Our arms bend a little further from our bodies and are more mobile at both joints.
FINGER LENGTH: Greater exposure to androgens in utero leads to a 4th (ring) finger that is longer than the 2nd (index), as often seen in men.
WOMEN HAVE A LONGER TORSO. Our skeleton accommodates extra reproductive organs and finds space to push things out of the way during pregnancy. It makes our legs shorter than men’s.
THE LARGER FEMALE PELVIS is better adapted for childbirth. It’s wider, longer, and held together by ligaments that soften during pregnancy, allowing the two halves to slide apart because of their narrow pelvis. Women’s slanted thigh bones put extra pressure on the knee joints, which have to rotate while men’s do not.
MEN HAVE BIGGER BRAINS by more than 10% relative to body size. Women’s brains have more connections between the two hemispheres, using both sides of the brain much more often than men.
cellular respiration occurs in both plants and animals. why do plants need cellular respiration?
Answers
Answer:
Like all other organisms, plants require energy to grow and thrive in their environment. The process of cellular respiration allows plants to break down glucose into ATP. ... Although plants use photosynthesis to produce glucose, they use cellular respiration to release energy from the glucose
Who is your favorite singer and song.....
mine is Selena Gomez, Justin Bieber , Arianna Grande...
btw I am Indian
Answers
Please help with the question
Answers
Answer: D. Invest in clean, cost-effective energy
Explanation:
Greenhouse gas emissions are clogging the atmosphere leading to global warming on the planet. This is causing temperatures and sea levels to rise.
There is therefore a need to invest in energy that is clean and will reduce greenhouse gas emission especially in the electricity industry. This can include renewable sources such as sustainable hydroelectricity and solar energy.
Propose two different genetic crosses that would allow you to determine the genotype of one mottled frog from the F2 generation.
Drag the terms on the left to the appropriate blanks on the right to complete the semtences. Terms can be used once, more than once, or not at all.
One cross would be a test crossand the other would be a backcrosd. The test would be the _____ F2 to a true-breeding _____ indiviual. If the _______ F2 is ______, then the test cross will produce ___ mottled ___ and leopard progeny. The backcross would be the _______ F2 to one of its parents. If both are ________, then the backcross will yield ___ mottled and __ leopard.
Answers
One cross would be a test cross and the other would be a backcross. The test cross would be the F2 individual to a true-breeding homozygous recessive individual. If the F2 individual is heterozygous, then the test cross will produce both mottled and leopard progeny in a 1:1 ratio.
The backcross would be the F2 individual to one of its parents. If both are heterozygous, then the backcross will yield both mottled and leopard progeny in a 3:1 ratio, with the dominant phenotype being more frequent. By analyzing the phenotype ratios of the progeny, the genotype of the original F2 individual can be determined.
The F2 mottled frog would be crossed with a true-breeding homozygous recessive individual. If the mottled frog is heterozygous (Mm), the test cross will produce a 1:1 ratio of mottled and leopard offspring.
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Sediment, deposition, earthquakes, and weathering are similar in that they
can all change the surface of the Earth.
are all a result of weathering.
all happen quickly.
all cause erosion
Answers
Answer: C (all cause erosion
Explanation:
Answer:
a) can all change the surface of the Earth.
Explanation:
Describe two ways how social media platforms are abused
Answers
Kids are exposed to things they shouldn’t be due to people posting inappropriate things
Ten seeds were planted each in 5 pots found around the house that contained 500g of “Peters potting soil”. The pots were given the following the following amounts of distilled water each day for 40 days. Pot1, 50 ml, pot2, 100ml, pot 3, 150 ml, pot 4, 200 ml , pot 5, 250ml. Pot 3 received the recommended amount of water that was best suited for the soil. The night of each plant was measured at the end of the experiment.
Answers
Answer:
eat ya veggies
stanza 4
z 8
pokemon wz
okinawa milktea
samgyeopsal
Suggest ways you could determine if two similar species are mimics in nature
Answers
Answer:
i dont speak english sorry
Explanation:
:/
A community includes
Answers
Answer:
A community includes both Biotic and Abiotic components of the environment.
Explanation:
Answer:
I got it right
Explanation:
In Study ISland
100 POINTS PLS HELP THIS IS WORTH MY ENTIRE SCIENCE GRADE MY MOM WILL KILL ME
In this lesson, you will conduct an investigation to observe the effects of resource availability on populations of organisms in an ecosystem.
Lab Report
Organisms and Populations
It’s time to complete your Lab Report. Save the lab to your computer with the correct unit number, lab name, and your name at the end of the file name (e.g., U1_ Lab_OrganismsAndPopulations_Alice_Jones.docx).
Introduction
1. What was the purpose of the experiment?
Type your answer here:
2. What limits the growth of populations?
Type your answer here:
3. Write a hypothesis based on observations and scientific principles.
Type your answer here:
Experimental Methods
1. What tools did you use to collect your data?
Type your answer here:
2. Describe the procedure that you followed to conduct your experiment.
Type your answer here:
Data and Observations
1. Record your observations.
Type your answer here:
Conclusions
1. What conclusions can you draw about how resource availability affects populations of organisms in an ecosystem? Write an evidence-based claim.
Type your answer here:
2. Write a testable question that could be used to further investigate the topic of resources and populations of organisms.
Type your answer here:
Answers
Explanation:
Introduction
The purpose of the experiment was to observe the effects of resource availability on populations of organisms in an ecosystem.
The growth of populations is limited by various factors such as competition for resources, predation, disease, and environmental conditions.
Based on observations and scientific principles, our hypothesis was that populations of organisms will increase in size when resources are abundant, and decrease in size when resources are scarce.
Experimental Methods
We used various tools such as binoculars, nets, traps, and sampling equipment to collect our data.
To conduct our experiment, we selected a study area and divided it into several quadrats. We then observed and recorded the population size and distribution of a selected species of organism in each quadrat, while also measuring the availability of resources such as food, water, and shelter.
Data and Observations
Our observations showed that when resources were abundant, populations of organisms increased in size and distribution. However, when resources were scarce, populations decreased in size and distribution. We also noted that competition for resources and predation had a significant impact on population size and distribution.
Conclusions
Based on our observations and data, we can conclude that resource availability has a direct effect on populations of organisms in an ecosystem. When resources are abundant, populations increase, and when resources are scarce, populations decrease. Our evidence-based claim is that the availability of resources is a critical factor in determining the size and distribution of populations in an ecosystem.
A testable question that could be used to further investigate the topic of resources and populations of organisms is, "How does the availability of specific resources, such as water or shelter, affect the growth and distribution of different species of organisms in an ecosystem?"
Problem arising that need solution wen doin seed priming
Answers
Answer: light, aeration, temperature, time and seed quality
explain biological hotspot
Answers
A biodiversity hotspot is a natural ecosystems that are largely intact and where native species and communities associated with these ecosystems are well represented.
Answer:
A biodiversity hotspot is a biogeographic region with significant levels of biodiversity that is threatened by human habitation.
Explanation:
have a nice day.
What do the numbers 3 and 4 refer to?
Answers
Which of these human activities do scientists consider the main cause of
recent global warming?*
о
burning fossil fuels
cutting down forests
building nuclear plants
O mining precious metals
Answers
Answer:
I believe it is burning fossil fuels.
Explanation:
Answer:burning fossil fuels and cutting down forests
Explanation:When we burn fossil fuels like coal, and gas to create electricity or power our cars, we release CO2 pollution into the atmosphere.
Plants and trees play an important role in regulating the climate because they absorb carbon dioxide from the air and release oxygen back into it. Forests and bushland act as carbon sinks and are a valuable means of keeping global warming to 1.5°C.
Subject: English
Question: Re-read the paragraph that begins on page 2, and ends on page 3.
Click the underlined phrase that uses literary device to make Northridge Junction seem like a desperate person.
Answers
The phrase '' it clung to an exposed ledge over the valley from which the train had lifted'' Northridge Junction seems like a desperate person.
What is despair?Despair is an emotional state of extreme tension, anxiety and fear.
The person immersed in this state cannot get out easily, because his negative perception contributes to his always being down. When recurrent, it becomes clinical and can take control of emotions.
A hallmark of clinical despair is the meaninglessness of feeling. There are no imminent threats, suffering or dangerous circumstances. Even so, the person experiences this state again and again.
What are the causes for despair?Despair is associated with some mental disorders, such as depression, anxiety, post-traumatic stress disorder, and especially panic syndrome.
Commonly, it is also caused by negative events in the person's life, such as trauma, divorce, dismissal, death of a loved one, abuse, use of chemical substances, among others.
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Why are white-eyed female fruit flies so rare in nature?
A. White-eyed females are not rare.
B. The allele for white eyes was nearly removed from the gene pool.
C. Females must inherit two copies of the recessive allele.
Answers
White-eyed female fruit flies so rarely in nature because females must inherit two copies of the recessive allele. Therefore, option C is correct.
Why are white-eyed female fruit flies so rare in nature?The gene for eye color in fruit flies is located on the X chromosome, and there are two possible alleles: one for red eyes (dominant) and one for white eyes (recessive).
Male fruit flies have only one X chromosome, so if they inherit the white-eyed allele, they will have white eyes. However, females have two X chromosomes, so they must inherit two copies of the white-eyed allele to have white eyes.
Because the white-eyed allele is recessive, it is much less common than the red-eyed allele in the gene pool. In nature, white-eyed female fruit flies are rare because they must inherit two copies of the recessive allele from both parents. Thus, option C is correct.
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Which element makes some rocks glow, helps oysters form pearls, and creates amazing cave formations?
Answers
The element which makes some rocks glow, helps oysters form pearls, and creates amazing cave formations is referred to as aragonite.
What is an Aragonite?This refers to an element which is similar to calcite as it also consists of calcium carbonate but however differs from it because it undergoes orthorhombic crystallization. It is formed from different biological and physical processes such as precipitation which goes on in the aquatic ecosystem.
This elements performs various functions in different substance such as making some rocks glow, helps oysters form pearls, and creates amazing cave formations.
This is therefore why aragonite was chosen as the most appropriate choice.
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Which statement best explains the importance of resource economics? 1. It details the costs of mining processes. 2. It provides fresh water to all areas of the world. 3. It examines the cost and profits of resource use. 4. It sets consistent prices to achieve sustainability.
I need help
Answers
Resource economics is a discipline that examines how societies employ their limited resources. The primary purpose of resource economics is to analyze how resources are developed, utilized, and depleted over time.
In general, the study is concerned with the optimal use of resources in a way that maintains or increases the well-being of people over time.The following statement best explains the importance of resource economics: It examines the cost and profits of resource use. According to resource economics, the optimal use of resources is obtained when the cost of producing and distributing goods is at the lowest possible level, while still guaranteeing that the goods and services are of high quality.
In order to achieve this, resource economics analyses the cost and benefits of resource use, and offers insight into how society can make the most efficient use of its limited resources. Therefore, this statement is the most appropriate, since it clarifies that resource economics is concerned with analyzing the cost and profits of resource use, which is necessary for any community to use its resources in a way that is both sustainable and profitable. Resource economics examines how resources are utilized and depleted over time, with the aim of maintaining or increasing the well-being of people over time.
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What is the complementary DNA strand to ATGGCAT?
Answers
Answer:
TACCGTA
Explanation:
Thymine pairs with Adenine and guanine pairs with cytosine in the DNA complimentary strand.
We can educate people from the ecological footprint that the 3 main factors of the footprint are transportation, housing and food decisions.
Answers
To educate the people, you can start by following some simple steps to reduce your own ecological footprint. We can improve the way we live, what we buy, and how we participate in the community to reduce greenhouse emissions.
What is an ecological footprint?The Ecological Footprint measures how fast we consume resources and generate waste compared to how fast nature can absorb our waste and generate resources.It is the impact a person or community has on the environment, expressed as the amount of land required to sustain their use of natural resources. To reduce ecological footprint we must reduce our personal emissions and press the government to make laws to ensure that larger emitters do the same.Certain sustainable practices (like recycling, paper vs. plastic, paper towels vs. cloth) do not have an extremely significant effect in reducing the ecological footprint.The 3 main factors of the footprint are transportation, housing and food decisions.Follow some of these steps to reduce your ecological footprint
Incorporate walking to some of your regular short-trip destinations.Reduce use of Single-Use, Disposable Plastics. Switch off lights and unplug devices when you're not using them. Eat more food that is made locally and less meat. A great place to start is by shopping at your local farmer’s market. The meat industry is a major source of greenhouse gas emissions.Use alternative transportation (bus, train, carpool, or bike) to get to work one day per week.Switch to Renewable Energy.When considering factors like food, water-use, waste and transportation, there is an urgent need for these sustainable daily actions.
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visking Tubing Iodine Name the physiological process being Investigated
Answers
The physiological process being investigated is diffusion.
What is diffusion?Diffusion is the movement of molecules from a region where they are more concentrated to one where they are less concentrated.
The net movement of molecules is from a region of high concentration to one of low concentration during diffusion.
In a cell, there are four different kinds of transport systems.
These are main active transport, secondary active transport, facilitated diffusion, and simple diffusion.
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WILL GIVE BRAINLIEST Describe how genes, chromosomes, proteins, mutations, and mutagens are related to each other.
Describe how random mutation in an individual can result in a new adaptation in a population.
pls help
Answers
Answer:
Errors in the human genetic code, which are called mutations, sometimes lead to the production of abnormal proteins that may cause disease, including autoimmune disease and malignancy.A gene mutation is a permanent alteration in the DNA sequence that makes up a gene, such that the sequence differs from what is found in most people. Mutations range in size; they can affect anywhere from a single DNA building block (base pair) to a large segment of a chromosome that includes multiple genes.
what type of molecule holds the instructions for making actin and myosin proteins in muscle cells?
Answers
The molecule that holds the instructions for making actin and myosin proteins in muscle cells is called deoxyribonucleic acid (DNA).
DNA is a double-stranded, helical molecule that contains the genetic information for all living organisms, including humans.
In closed circulatory systems, how are nutrients and oxygen transported from the blood to body cells? Does this transport occur in all parts of the system? Explain.
Answers
Answer:Through the collective work of active transport, osmosis and diffusion.
Explanation:
these transport occure through plasna membrane.