A certain reaction pathway consists of four steps. How would decreasing the amount of enzyme that catalyzes the second step affect the process?
What will be an ideal response?
Decreasing the amount of enzyme at the second step would slow down the whole series of reactions because less product would be available as substrate for the next two steps. The net result would be a decrease in the rate of production of the product and therefore, within a specified time, a decrease in the amount of the product.
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The contraction phase of the cardiac cycle is called
A) depolarization. B) systole. C) diastole. D) hyperpolarization. E) asystole.
This structure electrically insulates the axon of a neuron to increase the speed of nerve impulse conduction
a) A b) B c) C d) D e) E
Which of the following gives a cell structural support, determines the shape of a cell, and directs the movement of substances through a cell?
A. The Golgi complex B. The nucleus C. The cytoskeleton D. The plasma membrane E. Cholesterol
An increase in dead space results in
A. a decrease in alveolar ventilation but an increase in pulmonary ventilation. B. increases in both alveolar and pulmonary ventilation. C. a decrease in alveolar ventilation but no change in pulmonary ventilation. D. decreases in both alveolar and pulmonary ventilation. E. an increase in alveolar ventilation but no change in pulmonary ventilation. F. an increase in alveolar ventilation but a decrease in pulmonary ventilation.