Cardiac muscle fibers are electrically connected to neighboring fibers by
a) desmosomes.
b) tight junctions.
c) gap junctions.
d) interneurons.
e) chordae tendinae.
c
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A boy who has not passed through puberty sustains an injury to his anterior pituitary such that FSH is no longer released, but LH is normal. After he grows to maturity, one would expect that he would ________.
A) be sterile B) not develop secondary sex characteristics C) be impotent (unable to have an erection) D) have impaired function of interstitial cells
Usable energy in the ATP molecule is stored in the:
a. adenosine portion of the molecule b. bond attaching the adenosine to the first phosphate group c. bond between the second and third phosphate groups d. both B and C above
The act of moving the bone around a central axis is called ____
a. eversion b. supination c. flexion d. rotation
The parietal pleura
A. lines the thoracic wall. B. covers the digestive organs. C. lines the abdominal cavity. D. covers the lungs.