Jane donates a pint of blood to a blood bank. A few minutes later, which of the following would be decreased compared to pre-donation values?
A. her stroke volume and total peripheral resistance
B. her heart rate and total peripheral resistance
C. her heart rate and mean arterial pressure
D. the percentage of her cardiac output flowing to her kidneys
E. blood flow to her brain
D
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Immunoglobulins that are the first antibodies to be produced in response to infection are _________.
A) IgM. B) IgD. C) IgA. D) IgG. E) IgE.
During which phase of cell division do the chromatids line up along the equator of the cell?
A) anaphase B) prophase C) interphase D) telophase E) metaphase
Which statement about the parasympathetic nervous system is true?
A. Parasympathetic nerves stimulate contraction of smooth muscle in the walls of the epididymis and ductus deferens during emission. B. Fibers arising in the sacral division cause dilation of penile blood vessels and engorgement of erectile tissue. C. Parasympathetic nerves initiate erection in response to visual stimuli and sexual thoughts. D. Parasympathetic nerves constrict the penile arteries when the penis is directly stimulated. E. Parasympathetic fibers arise from T12 to L2 and pass through the hypogastric and pelvic nerve plexuses.
What are the specialized gap junctions found in cardiac muscle that conduct contraction stimuli from one cardiocyte to the next?
A) tight junctions B) desmosomes C) intercalated discs D) striations