In a relaxed muscle fiber, what blocks the active sites on actin?
A. Tropomyosin
B. Myosin heads
C. Troponin
D. Elastic fibers
E. Calcium ions
Answer: A
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In juxtamedullary nephrons, the efferent arterioles and peritubular capillaries are connected to a long, slender series of capillaries that accompany the nephron loops into the medulla. These are (the)
A) vasa recta. B) cortical radiate veins. C) segmental arteries. D) arcuate arteries. E) None of the answers are correct.
True or False? The enteric nervous system acts independently of the CNS to control local reflexes in the digestive tract.
Answer the following statement true (T) or false (F)
A 33-year-old male sustained an abdominal evisceration to the left lower quadrant of his abdomen after he was cut with a large knife. After appropriately managing his ABCs and assessing him for other life-threatening injuries, how you should care for his wound?
A. Irrigate it with sterile water and cover it with a dry dressing. B. Cover the exposed bowel and keep his legs in a straight position. C. Carefully replace the exposed bowel into the abdomen and transport. D. Cover it with moist, sterile gauze and secure with an occlusive dressing.
How is water transported back into the capillaries during reabsorption?
A. Blood pressure B. Active transport C. Osmosis D. Diffusion