an antagonist is a compound that enhances the action of a drug.
- True
- False
Answers
The given statement, "an antagonist is a compound that enhances the action of a drug" is false.
An antagonist is a type of compound that specifically acts on receptors in the body to block or inhibit the effects of a drug or endogenous ligand (a naturally occurring substance in the body). It does not enhance or amplify the action of a drug.
In the context of receptor binding, drugs and ligands can have either agonistic or antagonistic effects. Agonists are compounds that bind to receptors and activate them, triggering a biological response. On the other hand, antagonists bind to receptors but do not activate them. Instead, they prevent the binding of agonists or inhibit their activity, thereby blocking the normal physiological response.
Learn more about antagonist from the link given below.
https://brainly.com/question/30081757
#SPJ4
Related Questions
Sodium-22 has a 2.605-year half-life. If you begin with 1.570 grams of Na-22, how many grams are left after 1.00 year?
Type the correct answer in the box. Express your answer to the correct number of significant figures.
Answers
Answer:
1.20 grams
Explanation:
Correct on edmentum/plato
Answer: 1.20 grams
Explanation:
50 pts
In class, Ricardo rips up a piece of paper. Select the correct reason(s) that this is an example of a physical change. (more then one answer)
The paper no longer has smooth edges.
The paper has not produced a gas when torn.
The paper's chemical composition has been changed.
The paper has not changed colors.
The paper is still paper with the same chemical makeup.
Answers
Answer:
The paper no longer has smooth edges
The paper has not produced gas when torn
The paper has not changed colours
The paper is still paper with the same chemical makeup
2. The paper has not produced a gas when torn
3. The paper has not changed colors
4. The paper is still paper with the same chemical makeup
Find the grams in 5.26 x 10^-4 mol of HC2H3O2.
Answers
The question requires us to calculate the mass, in grams, contained in 5.26 x 10^-4 mol of HC2H3O2.
To solve this question, first we need to calculate the molar mass of the compound, considering the number of atoms of each element, and then relate the value obtained with the number of moles given (5.26 x 10^-4 mol).
First, to calculate the molar mass of the compound, let's consider the following atomic masses:
atomic mass of C = 12.01 u
atomic mass of H = 1.007 u
atomic mass of O = 15.99 u
Next, we calculate the molar mass. To do that, we need to consider the number of atoms of each element: according to the chemical formula, there are 2 atoms of C, 4 atoms of H and 2 atoms of O:
molar mass (C2H4O2) = (2 * 12.01) + (4 * 1.007) + (2 * 15.99) = 60.03 g/mol
Now, we know that there are 60.03 g for each mol of the compound. With that information, we can estabilish the following relation to calculate the mass contained in 5.26 x 10^-4 mol of the compound:
1 mol --------------------- 60.03 g
5.26 x 10^-4 mol ----- x
Solving for x, we have:
\(x=\frac{(5.26\times10^{-4}\text{ mol)}\times(60.03\text{ g)}}{(1\text{ mol)}}=0.03158\text{ g}\)Therefore, there are 0.03158 g of HC2H3O2 in 5.26 x 10^-4 mol of this compound.
Ionic bonds are ___________ than covalent bonds and are ___________ common in cells.
Answers
Answer:
Ionic bonds are stronger than covalent bonds
A(n) _____ may be defined as a compound which contributes hydroxide ions or increases the OH- concentration when dissolved in water.
salt
base
ester
acid
Answers
Answer:
Base
Explanation:
Bases on dissolving with water release hydroxide ions
Take a example of Sodium hydroxide
NaOH+H_2O-->Na_0+OH-what will be the result of the reaction
(CH3COO)2+redP +Cl2
Answers
Answer:
(CH3COO)2 + redP + Cl2 → ClCH2COOH + HCl
Explanation:
This is an example of halogenation of carboxylic acids at alpha carbon atom. In this reaction, red phosphorus and chlorine are treated with carboxylic acids having alpha hydrogen atom followed by hydrolysis to form alpha chloro carboxylic acid.
according to Bohr atomic model
Answers
Answer:
A small positively charged nucleus surrounded by revolving negatively charged electrons in fixed orbits
which of the following is a pure compound A. ethanol B. petrol C. steel D. tap water
Answers
Answer:
D. tap water
keep on learning!
Answer: ethanol
Explanation: as it is a pure compound and can sometimes be a mixture while all the rest are mixtures.
Which is most likely true about electronegativity?
Answers
Answer:
it intends to increase to be the same across a period
Pleasee help me (15 points)
Answers
Answer:
Full moon.
Explanation:
This diagram shows a full moon because the sunlight is shining directly onto the side of the moon facing the earth in this instance.
Answer:
It is A
Explanation:
Why is proline often found at places in proteins that are not alpha-helical? (Select all that apply.) Proline, unlike other amino acids, has a fixed angle of rotation around its C(alpha)-C(O) bond. Proline is only found in beta-sheets. Proline has a side chain that is too bulky for alpha-helices. Proline, unlike other amino acids, has a fixed angle of rotation around its C(alpha)-N bond. Proline fits well into beta-turns.
Answers
The properties of proline that often lead to it being found at places in proteins that are not alpha-helical include:
A: Proline, unlike other amino acids, has a fixed angle of rotation around its C(alpha)-C(O) bond.
D: Proline, unlike other amino acids, has a fixed angle of rotation around its C(alpha)-N bond.
E: Proline fits well into beta-turns.
Proline is unique among the amino acids in that it has a cyclic peptide bond between its nitrogen and its alpha-carbon, which results in a fixed angle of rotation around both the C(alpha)-C(O) bond and the C(alpha)-N bond. This rigid conformation makes proline poorly suited for alpha-helical structures, but ideal for beta-turns, which are common structural elements in proteins that help to create specific protein-protein interactions and maintain protein stability.
You can learn more about proline at
https://brainly.com/question/28518772
#SPJ4
When scientists analyze the fossil record, they find organisms that are similar to some organisms of today with noticeable changes. How does this help scientists to interpret the past? A. It doesn't help them at all. B. It allows them to see how organisms have changed over time. C. It allows them to see how organisms have remained the same over time. D. It allows them to see that there is no relationship between the past and today.
Answers
Answer:
The answer is B.
Explanation:
The logical explanation is that fossils from animals are changing over time caused by enviroment change ,natural disaters,astronmical events,and so on.These organisms need to adapt over time and so there features change.For Example the dragon fly used to be as big as a bus now that it has adapted and changed from when the cretaceous period it is as small as your index finger.
Which of the following has mechanical energy? (5 points)
Car battery
Compressed spring
Glowing incandescent lightbulb
Nucleus of uranium atom
Answers
Answer:
compressed spring
Explanation:
Which best represents a balanced equation?
A. HgO → Hg + O2
B. 2Fe + O2 → Fe2O3
C. 2H2 + 02->2H2O
Answers
Explanation:
none of them
mark me as brainlist ok
Answer:
C
Explanation:
4 - H - 4
2 - O - 2
each side of the arrow has an equal amount of elements
SI units is an improved version of MKS system.
Answers
Answer:
the S.I unit
Explanation:
is the best unite
Why would researchers try to determine the initial rate of enzyme activity (V0) at a very early time point in the reaction
Answers
Researchers would try to determine the initial rate of enzyme activity (V0) at a very early time point in the reaction in order to understand the kinetics of the enzyme-catalyzed reaction.
The initial rate of enzyme activity provides information about how quickly the reaction proceeds at the beginning, when the substrate concentration is high and the product concentration is low. By determining the initial rate, researchers can gather data on the reaction's speed and efficiency, which can help them study the enzyme's properties, such as its catalytic efficiency and substrate specificity.
Additionally, the initial rate can be used to calculate the enzyme's turnover number (kcat), which is the number of substrate molecules converted into product per enzyme molecule per unit of time. Overall, determining the initial rate of enzyme activity at a very early time point is crucial for understanding the initial stages of the reaction and characterizing the enzyme's behavior.
learn more about enzyme-catalyzed reaction
https://brainly.com/question/30215655
#SPJ11
Find w, x, y and z such that the following chemical reaction is balanced. w Ba3 N₂ + xH₂O →yBa(OH)2 + ZNH3
Answers
The values of balanced chemical reaction is w = 1, x = 6, y = 3, and z = 2
To balance the chemical equation:
1. Balancing nitrogen (N):
There are three nitrogen atoms on the left side (Ba₃N₂), so we need to place a coefficient of 3 in front of NH₃:
w Ba₃N₂ + x H₂O → y Ba(OH)₂ + 3 z NH₃
2. Balancing hydrogen (H):
There are six hydrogen atoms on the left side (2 × 3), so we need to place a coefficient of 6 in front of H₂O:
w Ba₃N₂ + 6 H₂O → y Ba(OH)₂ + 3 z NH₃
3. Balancing barium (Ba):
There are three barium atoms on the left side (3 × Ba₃N₂), so we need to place a coefficient of 3 in front of Ba(OH)₂:
w Ba₃N₂ + 6 H₂O → 3 y Ba(OH)₂ + 3 z NH₃
4. Balancing oxygen (O):
There are six oxygen atoms on the right side (6 × OH), so we need to place a coefficient of 3 in front of Ba(OH)₂:
w Ba₃N₂ + 6 H₂O → 3 Ba(OH)₂ + 3 z NH₃
Now the equation is balanced with the following coefficients:
w Ba₃N₂ + 6 H₂O → 3 Ba(OH)₂ + 3 z NH₃
Therefore, w = 1, x = 6, y = 3, and z = 2 would satisfy the balanced chemical equation.
Learn more about balanced chemical reactions at https://brainly.com/question/26694427
#SPJ11
If 16.4 g of oxygen gas react with excess hydrogen, how many moles of water are produced?
2H2(g) + O2(g) → 2H2O(g)
Answers
Answer:
1.02 (or 1.03 if rounded)
Explanation:
Given 16.4 grams of oxygen gas, you would want to write that down to set up your unit conversions.
16.4 g O2/1 * 1 mol of O2/31.998 g O2 * 2 mol H2O/1 mol O2
Multiply the numbers on the top and divide that by the product of the numbers on the bottom.
16.4 * 1 * 2 = 32.8
1 * 31.998 * 1 = 31.998
32.8/31.998 = 1.025...
Don't forget to consider the number of significant figures if it asks!
what is the molecular formula of first 20 elements
Answers
Answer:
H
He
Li
Be
B
C
N
O
F
Ne
Na
Mg
Al
Si
P
S
Cl
Ar
K
Ca
What kind of reaction happens when two compounds switch elements? Apex
Answers
Answer:
A replacement reaction occurs when elements switch places in compounds. This type of reaction involves ions. Generally, more reactive elements replace less reactive elements. A single replacement reaction occurs when one element replaces another element in one compound.
Explanation:
Just figured it out!
Answer: a double - replacement reaction
Explanation:
I just got it right on Apex
What is the definition chemical property of matter?
Answers
Answer:
Describes its potential to undergo some chemical change or reaction by virtue of its composition
Ice waters melt to form liquid water The water spreads out to match the shape of its container after heating on the stove the water begins to boil and change into steam which statement is true about this process
Answers
Answer:the water starts to boil and creates steam
Explanation:
how to write 0.99966788 in scientific notation?
Answers
Answer:
9.9966788 x 10^-1
which gas is not an example of a naturally occurring greenhouse gas?responsesnitrous oxidenitrous oxidemethanemethanechlorofluorocarbonchlorofluorocarbonwater vapor
Answers
Chlorofluorocarbons (CFCs) are not naturally occurring greenhouse gases.
Chlorofluorocarbons (CFCs) are not naturally occurring greenhouse gases. They are synthetic compounds that were widely used in refrigerants, solvents, and aerosol propellants.
CFCs were found to deplete the ozone layer in the upper atmosphere, leading to the adoption of the Montreal Protocol to phase out their use.
While they are not naturally occurring, they contribute significantly to global warming due to their strong greenhouse effect.
To know more about Chlorofluorocarbons refer here:
https://brainly.com/question/16159504
#SPJ11
Can elements from group 1 and 2 show up as pure elements in nature? Except Hydrogen
Answers
Answer:
No. Although alkali metals and alkaline earth metals are found in nature, they are not found as pure elements. Group 1 and 2 are found in their chemical compounds, not pure form.
the superscript preceding each hydrogen atomic symbol (h) represents what?
Answers
The superscript preceding each hydrogen atomic symbol (h) represents the mass number.
The mass number is the total number of protons and neutrons in the nucleus of an atom. It is represented by the superscript preceding the atomic symbol of an element. In the case of hydrogen (H), hydrogen atoms can have different mass numbers due to the presence of different numbers of neutrons.
For example, the most common isotope of hydrogen, known as protium, has a mass number of 1. It is denoted as ¹H. Deuterium, another isotope of hydrogen with one neutron in addition to one proton, has a mass number of 2 and is represented as ²H. Tritium, which contains two neutrons and one proton, has a mass number of 3 and is denoted as ³H.
The superscript preceding the atomic symbol provides information about the specific isotope of the element and allows distinguishing between isotopes with different numbers of neutrons.
To learn more about mass number, here
https://brainly.com/question/18803094
#SPJ4
how many significant figures of .00000281 mA
Answers
Answer:
3 Significant Figures.
Explanation:
The zeros to the left of non-zero numbers are Leading Zeros. These zeros are NOT significant. They serve as placeholders to locate the decimal point.
Answer:
3
Explanation:
To determine the number of significant figures in a number use the following 3 rules:
Non-zero digits are always significant
Any zeros between two significant digits are significant
A final zero or trailing zeros in the decimal portion ONLY are significant
Example: .500 or .632000 the zeros are significant
.006 or .000968 the zeros are NOT significant
What is the net ionic equations of Cu (s) + 2 AgC2H3O2 (aq) --> Cu(C2H3O2)2(aq) + 2 Ag(s) ?
Answers
Answer:
Explanation:
Cu(s) + 2Ag+ ======> Cu^(2+) + Ag(s)
Notice what happened. Silver started out as an ion. It took on 2 electrons that were donated by the copper.
The silver then became a solid ppte. This equation wil take on much more meaning when you take up oxidation and reduction. Until then, you need only know who gave up elections and who took them up.
Earth’s moon is 384,400 km from earth. What is the correct way to write this distance in scientific notation?
Answers
Answer: 3.844 times 10 to the 5th power
Explanation:
Answer:
3.844 * 10^5 kilometres
Explanation:
hope you find it helpful.
What might happen if water molecules did not have a slight negative charge on one end and a slight positive charge on the other? Polar molecule
Answers
If water molecules did not have a slight negative charge on one end and a slight positive charge on the other then Water would be incapable of freezing or boiling.
What is water?Water is an inorganic polar chemical. At room temperature, it is an odorless and tasteless liquid with a tinge of blue. This most basic hydrogen chalcogenide is unquestionably the most researched chemical compound and therefore is known as that of the "universal solvent" due to its propensity to dissolve a wide range of compounds.
If water molecules did not have a slight negative charge on one end and a slight positive charge on the other then Water would be incapable of freezing or boiling.
Therefore, water would be incapable of freezing or boiling.
To learn more about water, here:
https://brainly.com/question/16630851
#SPJ9