During the S-T segment, what is occurring within cardiac muscle cells?
A. Sodium is rapidly diffusing out of atrial muscle cells.
B. Sodium channels are beginning to open in ventricular cells and calcium is entering through slow channels in atrial cells.
C. Calcium is entering and potassium is leaving ventricular cells.
D. Potassium is entering atrial cells and sodium is leaving ventricular cells.
C
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The subpapillary plexus is
A) a network of nerves in the cutaneous membrane. B) a superficial network of dermal arteries. C) a deep network of dermal arteries along the boundary of the reticular layer. D) a neural plexus responsible for deep pressure. E) a network of arteries in the epidermis.
Which of the following is INCORRECTLY matched with its function?
A) FSH — stimulates ovarian follicle growth B) estrogen — provides protection against osteoporosis C) calcitonin — inhibits osteoblast activity D) All of the above are matched correctly.
Which layer is not found in the wall of the ureter?
A. Muscularis B. Mucosa C. Adventitia D. Submucosa
Which of the nerves arising from the lumbosacral plexus is the largest peripheral nerve in the body?
A) femoral B) ischiadic nerve C) obturator nerve D) pudendal nerve