Spermatozoa is the only type of human cell that contains a _____, which is a whip-like structure that helps propel the sperm towards an oocyte
a) cilium
b) flagellum
c) mitochondria
d) centrosome
e) microvillus
Answer: b
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List the four types of autorhythmic cells that drive the heartbeat. Draw a sketch of the heart and indicate the location of each type of cell.
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The region of the stomach that empties into the duodenum is the
A) antrum. B) fundus. C) body. D) cardia. E) pylorus.
Which of the following respiratory membrane layers is closest to air in the alveolus?
A. alveolar epithelium B. alveolar basement membrane C. capillary basement membrane D. capillary endothelium E. alveolar fluid (with surfactant)
Which of the following statements concerning cholecystokinin is correct?
A. Cholecystokinin stimulates relaxation of the gallbladder. B. Cholecystokinin stimulates secretion of mucus by the gastric glands. C. Cholecystokinin stimulates the pancreas to release an enzyme-rich solution. D. Cholecystokinin stimulates the intestine to secrete trypsin. E. Cholecystokinin stimulates gastric secretions.