Senescence begins at different ages and progresses at different rates in different organ systems
Indicate whether the statement is true or false
TRUE
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Which of the following is incorrect pertaining to bronchopulmonary segments?
A) Each is separated from adjacent segments by visceral pleura. B) Each is supplied independently by a tertiary bronchus and tertiary branch of the pulmonary artery. C) Each is surgically resectable. D) Each is drained by intersegmental parts of the pulmonary veins that lie in the tissue between segments. E) There are approximately eight to ten in each lung.
Which of the following is a sympathetic reflex?
A) defecation B) swallowing C) coughing D) pupillary reflex E) urination
Normal pH for blood is 7.35 to 7.45. Maintenance of the pH in this range is
A. not critical because extreme pH values do not affect enzyme function. B. not required. C. critical because enzymes work best within narrow ranges of pH. D. called denaturation. E. None of the choices are correct.
What is the role of NO (nitric oxide) in the male sexual act?
A. Contraction of somatic muscles of the urogenital diaphragm B. Activation of a G protein C. Dilation of blood vessels in the penis D. Secretion of mucus