The abdominal muscle that has its origin at the pubic crest and symphysis pubis is the
A. rectus abdominis.
B. transversus abdominis.
C. external abdominal oblique.
D. internal abdominal oblique.
E. linea alba.
A
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Which of the following events is NOT a characteristic of an action potential?
A. The plasma membrane becomes highly permeable to sodium ions and depolarization results. B. As sodium ions enter, the inside of the plasma membrane becomes more negative. C. At the peak of depolarization, sodium channels begin to close and potassium channels open. D. In repolarization, potassium ions flow out of the cell. E. Action potentials occur according to the all-or-none principle.
A __________ RNA binds an amino acid
Fill in the blank(s) with correct word
Which of the following is a type of roundworm?
a. trichuris vulpine c. ancylostoma caninum b. toxocara cati d. dirofilaria immitis
Which of the following does not occur to compensate for a fall in blood pressure below normal?
a. cardiac output is increased. b. total peripheral resistance is decreased. c. heart rate is increased. d. venous vasoconstriction occurs. e. stroke volume is increased.