Which of the following primary germ layers develops into the linings of the digestive, respiratory, and urinary organs?
A. Periderm
B. Exoderm
C. Endoderm
D. Ectoderm
E. Mesoderm
Answer: C
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The structures that connect cardiac muscle cells are
A) motor end plates. B) intervertebral discs. C) neuromuscular junctions. D) intercalated discs.
Which type of cell would have an abundance of peroxisomes?
A. White blood cell, a phagocyte B. Liver cells that detoxify hydrogen peroxide C. Cardiac muscle cells (require large amounts of ATP) D. Fibroblast (makes protein fibers) E. Mucus cell (secretes mucus)
What characteristic differentiates cardiac muscle cells from skeletal muscle cells?
A) striations B) excitability C) sarcoplasmic reticulum D) intercalated discs
When baroreceptors sense a drop in blood pressure, the vasomotor center responds by:
A. suppressing cardiac function B. reducing vasomotor tone C. triggering peripheral vasodilation D. triggering peripheral vasoconstriction