________ of the nephron loop is/are impermeable to salt.
A. The ascending limb
B. The descending limb
C. Both limbs
D. Neither limb
Answer: B
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The __________ valve is between the right atrium and right ventricle.
a. aortic semilunar b. pulmonary semilunar c. bicuspid d. tricuspid
Benefits of regular exercise include all of the following, EXCEPT __________.
A) lowered blood pressure. B) increased plasma levels of HDL (high-density lipoproteins). C) decreased risk of heart attack. D) decreased plasma levels of triglycerides. E) increased levels of LDL (low-density lipoproteins).
What is ATP used for in the process of muscle contraction?
A. Power stroke of myosin cross-bridge B. Pump calcium ions back into the sarcoplasmic reticulum C. Release of myosin from actin D. All apply.
Cells possessing many highly branched cytoplasmic processes are found in the:
a. Distal convoluted tubule b. Parietal layer of Bowman's capsule c. Thin segment of the loop of Henle d. Ureter e. Visceral layer of Bowman's capsule