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Ray Of Light [21]
3 years ago
10

Threshold can be defined as the minimum voltage needed to generate an action potential. Is the threshold for the first action po

tential the same as, or different from, the threshold for the second action potential with a 60 msec interval?

Biology
1 answer:
LenKa [72]3 years ago
4 0

The question is incomplete as it does not have the data which is provided.

Answer:

The threshold for the first action potential will be lower compared to second action potential.

Explanation:

The action potential is generated in the cell because of the movement of the ions across the membrane of the neuron cell. The resting potential of the cell membrane is maintained between the -40 to -90 mV and the resting potential of the neuron membrane is at -70mV.

When depolarization occurs, the potential changes and when reaches the threshold generates an action potential.  In the given experiment we observed that the threshold potential of the first action potential is 20mV and second potential at 25 mV at 60 msec.

This shows that the action potential of the first action potential is lower than the second potential.

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B

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A scientist observes that, when the pH of the environment surrounding an enzyme is changed, the rate the enzyme catalyzes a reac
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Assuming  the pH is too low, the enzyme medium becomes acidic;Acidosis. The high Hydrogen ions concentration  interacts with the R-groups of the amino acids moiety of the enzymes, this interaction affects the ionization of the  R-groups, disrupting the ionic bonding holding these R-groups in shape.

This results in loss of the 3-Dimensional shape arrangements of the protein molecule  and therefore of the active sites. Since active sites of  enzymes  determines the specificity of the <u>enzymes substrate- complex </u> to give <u>enzyme-product complex,</u> the catalytic activity of the enzymes decreases, <u>the rate of  reaction decreases,and products formation stops, and the reaction also stops.</u>

The same is applicable to extremely high pH=Alkalosis.

However, the effective buffer system of the body prevents this scenarios from happening in real sense in the body. Through mopping by the  haemoglobin, excretion by the kidney, etc

7 0
3 years ago
Suppose that an arginine residue in the active site of an enzyme was mutated to alanine. As expected, the alanine mutant was ina
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Answer:

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Thus, the answer is alanine to lysine.

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