Triads in skeletal muscle consist of which of the following?
A) sarcoplasm, sarcoplasmic reticulum, calcium ions
B) sarcoplasmic reticulum, terminal cisterna, sarcoplasm
C) two terminal cisternae and a T-tubule
D) two T-tubules and one terminal cisterna
Ans: C) two terminal cisternae and a T-tubule
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____________________ controls are primarily responsible for matching tissue blood flow with the metabolic needs of the tissue involved
Fill in the blank(s) with correct word
Increase in ECF osmolarity
a. stimulates the osmoreceptors in the hypothalamus and causes the release of vasopressin (ADH). b. may decrease systemic blood pressure. c. may cause vasodilation in order to increase arterial blood pressure. d. may cause the release of vasopressin and a decrease in systemic blood pressure. e. may decrease systemic blood pressure and cause vasodilation.
Many athletes train at higher altitudes immediately prior to an athletic competition. Select the scenario that correctly identifies how acclimatization to a higher elevation would improve endurance performance.
A. A hypoxic ventilatory response occurs that remains in place for a few weeks after returning to a lower altitude. B. Increased ventilation at the higher altitudes will improve tidal volume when returning to the lower altitude. C. Erythropoietin release will increase; consequently, the athlete will have a greater aerobic capacity when returning to the lower altitude. D. Hemoglobin's affinity for oxygen will increase; therefore, tissues will receive more oxygen during exercise.