A pacemaker potential depends on the increased inward current of calcium ions
Indicate whether the statement is true or false
T
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During orgasm, the ductus deferens undergoes
A. peristalsis, and the internal urethral sphincter of the bladder relaxes. B. peristalsis, and the internal urethral sphincter of the bladder contracts. C. segmentation, and the external urethral sphincter contracts. D. segmentation, and the external urethral sphincter becomes engorged with blood.
Which hormone is stimulated by high levels of dietary fat in the small intestine?
a) Pepsin b) Secretin c) Gastrin d) Cholecystokinin e) Amylase
Match the cell type with its function.A. Produce hormonesB. Produce mucusC. May protect intestinal epitheliumD. Synthesize bileE. Produce digestive enzymesEndocrine cells
Fill in the blank(s) with the appropriate word(s).
The human immunodeficiency virus (HIV) that causes the disease known as AIDS selectively infects ________ cells
A) B B) plasma C) cytotoxic T D) helper T E) suppressor T