Calcium ions are released from the sarcoplasmic reticulum during the ________ of contraction.
A) latent period
B) contraction phase
C) recovery phase
D) relaxation phase
E) A and B
E) A and B
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As blood circulates from arteries into capillaries, the total cross-sectional area of capillaries
A) decreases and causes the blood velocity to decrease. B) is the same as the total cross-sectional area of arteries and blood velocity is equal between arteries and capillaries. C) increases and causes the blood velocity to decrease. D) increases and causes the blood velocity to increase. E) decreases and causes the blood velocity to increase.
Which of the following describes a severe and often fatal disorder caused by exposure to high temperatures?
a) Heat cramps b) Heat exhaustion c) Heat prostration d) Heatstroke e) None of these
This is a sagittal section through the abdominopelvic cavity. What structures does "E" represent?
A. Mesentery B. Parietal peritoneum (lines cavity) C. Retroperitoneal organs D. Visceral peritoneum (covers organs) E. Peritoneal cavity
What happens at the end of the uterine cycle if fertilization has not occurred?
A) The corpus luteum degenerates. B) The follicle degenerates. C) The corpus luteum is formed. D) Ovulation occurs.