The main ways that the nephron regulates pH of the urine is through all of the following EXCEPT
A) H+ transport.
B) HCO3- transport.
C) Ammonia transport.
D) NaOH transport.
Answer: D
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When acetylcholine binds to receptors at the motor end plate, the sarcolemma becomes
A) more permeable to sodium ions. B) less permeable to sodium ions. C) more permeable to calcium ions. D) less permeable to potassium ions. E) less permeable to potassium and sodium ions.
Vasopressin, or antidiuretic hormone, is secreted from the posterior pituitary in response to input from hypothalamic osmoreceptors which were activated by
a. increased levels of osmium in the blood. b. softening of the cervical os (the outlet of the uterus). c. increased plasma osmolarity. d. increased blood volume. e. increased blood pressure.
The digestive action of the stomach begins when it is stimulated by the _____.?
A) ?gallbladder B) ?esophagus C) ?nervous system D) ?liver
As a bone increases in diameter, what happens to the medullary cavity?
A) The medullary cavity increases in diameter because bone matrix is removed by osteoblasts. B) The medullary cavity increases in diameter because bone matrix is removed by osteoclasts. C) The medullary cavity decreases in diameter because bone matrix is added by osteoclasts. D) The medullary cavity decreases in diameter because bone matrix is added by osteoblasts. E) The medullary cavity diameter does not change but fills in with more bone marrow.