Which three functional roles in a movement are used to characterize muscle groups? Give a brief description of each action
Agonist, antagonist, or synergist. Agonists are chiefly responsible for a movement. Antagonists oppose the agonists, keeping the movements smooth. Synergists provide additional force or stabilize the origin.
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A sickle-shaped vertical partition that divides the left and right cerebellar hemispheres is the
A. diaphragma sellae. B. superior sagittal sinus. C. falx cerebri. D. falx cerebelli. E. tentorium cerebelli.
The vagina
A. is a receptacle for the penis during intercourse. B. is a passageway for blood flow during menses. C. is a passageway for the infant during childbirth. D. All of the above E. None of the above
Upon palpating the anterior abdominal wall of a patient, you notice an intense reflexive muscular contraction in the abdominal muscles. Which of the following is not correct pertaining to this sign?
A) It is called "guarding." B) It may indicate an inflamed appendix. C) Functionally, these spasmodic muscular contractions are an attempt to protect the underlying viscera. D) It is best observed when the patient is perfectly supine. E) The impulses for muscular contractions are carried through the ventral rami of the inferior thoracic and first lumbar nerves.
Which of the following increases the rate of gas exchange across the respiratory membrane?
A. Decreased surface area of the respiratory membrane B. Increased fluid in the alveoli C. Increased surface area of the respiratory membrane D. Increased thickness of the respiratory membrane E. Increased connective tissue in the alveolar wall