Peristaltic antral contractions
a. occur at a rate of 3/min
b. are responsible for emptying food into the duodenum
c. are responsible for mixing food and gastric enzymes within the antrum
d. are the result of smooth muscle contractions
e. have all of the above characteristics
E
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Which of the following is not involved in the regulation of gastric activity?
A) submucosal neural plexus B) myenteric plexus C) vagus nerve D) CNS E) hypoglossal nerve
Which of the following statements is true?
a. Structure/function relationships are evident at the organismal level, but not at the molecular level. b. Evolution by natural selection led to physiologic adaptation historically, but is not relevant to extant organisms. c. Homeostasis is the tendency toward relative stability in the internal environment of an organism. d. Feedback control refers specifically to the homeostatic mechanisms that help organisms stop eating when they’re satiated.
What is occurring when a muscle contracts but no movement is produced?
a. Twitch contraction. b. Tetanic contraction. c. Isotonic contraction. d. Isometric contraction.
List the bones that form the orbit
What will be an ideal response?