During the plateau phase of a cardiac muscle cell's action potential, the membrane stays
A. depolarized as potassium exits and calcium enters.
B. depolarized as potassium enters and calcium exits.
C. repolarized as sodium enters and calcium exits.
D. hyperpolarized as sodium and calcium exit.
E. hyperpolarized as potassium enters and calcium exits.
A
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A. erector spinae B. longissimus capitis C. interspinales D. multifidus E. psoas minor
Which of the following represents the correct sequence of how sperm will travel through the spermatic ducts?
A. Efferent ductules - epididymis - ductus deferens - ejaculatory duct B. Ductus deferens - ejaculatory duct - efferent ductules - epididymis C. Efferent ductules - ductus deferens - ejaculatory duct - epididymis D. Epididymis - ductus deferens - ejaculatory duct - efferent ductules
The skull bone that forms the chin is also the only bone connected to the skull by a freely moveable joint. This bone is the
A. hyoid. B. mandible. C. maxilla. D. vomer. E. mental bone.
Which type of bone cell has a ruffled border and secretes acids?
A. Osteoblast B. Osteocyte C. Osteoclast D. Osteochondral progenitor cell