Q&A Hero

Q: Which of the following is not a function of the Na+-K+ pump? A. Heat production B. Transport of Na+ into the cell and K+ out of the cell C. Secondary active transport D. Regulation of cell volume E. Maintenance of membrane potential

Q: Blood Ca2+ deficiency stimulates __________ secretion, which leads to __________. A. calcitonin; more urinary phosphate reabsorption B. calcitriol; more urinary phosphate excretion C. parathyroid hormone; increased osteoclast activity D. growth hormone; increased osteoblast activity E. thyroid hormone; less urinary calcium excretion

Q: When the voltage of a plasma membrane shifts from +35mV towards 0 mV, the cell is __________. A. depolarizing B. repolarizing C. hyperpolarizing D. reaching the threshold E. exiting the threshold

Q: Parkinson disease is a progressive loss of motor function due to the degeneration of specific neurons. These neurons secrete an inhibitory neurotransmitter that prevents excessive activity in motor centers of the brain. What neurotransmitter is this? A. Serotonin B. Dopamine C. Acetylcholine D. GABA E. Glutamate