By the time filtrate reaches the tip of the loop of Henle, ________ of the filtrate volume has been reabsorbed.
A. 100%
B. 80%
C. 75%
D. 65%
E. 95%
Answer: B
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In which region of the nephron does the fractional reabsorption of water vary the most in response to variation in the state of hydration?
A. The collecting duct B. The glomerulus C. The distal convoluted tubule D. The proximal convoluted tubule E. The loop of Henle
Which of the following is an ascending pathway in the spinal cord?
A. Tectospinal tract B. Lateral corticospinal tract C. Lateral spinothalamic tract D. Anterior corticospinal tract E. Rubrospinal tract
Describe the stimulus for bone resorption and how resorption is carried out at the cellular and chemical levels
What will be an ideal response?
One of the reasons you might struggle to lift a heavy object with your arm fully extended is because
A. in extension, the proximity of Z discs to thick filaments restricts the sliding movement within sarcomeres. B. full extension results in decreased overlap between thick and thin filaments in the muscle. C. in that posture, some myosin heads overlap actin in the wrong orientation and tug actin in the wrong direction. D. motor neurons cannot release as much ACh in that posture.