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natita [175]
3 years ago
14

Chapter 7 assesment answer

Biology
1 answer:
CaHeK987 [17]3 years ago
6 0
Https://quizlet.com/58016588/biology-chapter-7-assessment-flash-cards/
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How is the DNA of all organisms common?
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Describe the effect that exercise has on tidal volume, alveolar ventilation, and anatomical dead space compared to the resting r
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Exercise or any other physical activity, increases the oxygen demand in the lungs and affects the flow of air into the lungs.

Tidal Volume: The amount of air inspired (air that leaves or enters the lungs) during breathing is called tidal volume.  With the increase in physical activity such as exercise, the tidal volume increases to allow more gaseous exchange. During exercise, the amount of air to be inhaled increases, thus the tidal volume also increases.

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Select all that apply.
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o hybridization thhtyhht

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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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A rise or fall in the pH of the medium from the optimum of pH 7 usually affect  the  enzymes' active sites  of  and therefore the  shape and  the  rate of enzyme activity.

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

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