The beating of the cilia of the respiratory passages in the direction of the pharynx forms a(n)
A) debris filter.
B) mucus escalator.
C) respiratory rhythmicity center.
D) smooth slick surface allowing particles to slide.
E) increased surface area for gas exchange.
B
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Two of your physiology classmates are trying to figure out if cross country skiing is a voluntary activity or a rhythmic activity. They come to you to determine who is correct. What do you tell them?
What will be an ideal response?
Which of the following is the origin of the bulbospongiosus?
A) ischial spine B) inferior ischial ramus C) linea alba and pubis D) coccyx E) collagen sheath at the base of the clitoris or penis
What is the reflexive movement of both eyes medially to view objects close to us?
A) emmetropia B) convergence C) accommodation D) inversion
A fat cell responds to the presence of the hormone epinephrine by increasing cytosolic cyclic AMP production, which leads to the catabolism of both glycogen and fat. What is the most likely explanation for this phenomenon?
A. Epinephrine is binding to two types of receptors in the plasma membrane. B. The activated receptor complex stimulates production of two different second messengers. C. Cyclic AMP directly activates enzymes that catabolize glycogen and fat. D. Cyclic AMP-dependent protein kinase activates two kinds of enzymes.