The more fixed attachment of a muscle that serves as a basis for the action is the ____
A. frontalis
B. origin
C. insertion
D. motor unit
Ans: B. origin
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A swallow will initiate which of the following events?
A. contraction of the lower esophageal sphincter B. relaxation of the gastric antrum C. secondary esophageal peristalsis D. relaxation of the pyloric sphincter E. relaxation of the gastric cardia
When odorant molecules contact the dendritic processes of olfactory receptors the initial response is
A) an action potential. B) activation of a kinase. C) a generator potential. D) a hyperpolarization potential. E) a conversion of 11-trans retinal to 11-cis retinal.
________ involves active inspiratory and expiratory movements and calls on accessory muscles to assist with inhalation, while exhalation involves contraction of the internal intercostal muscles and sometimes abdominal muscles, too
A) Eupnea B) Forced breathing C) Costal breathing D) Vital breathing E) Passive breathing
Rickets, a disease characterized by overproduction and deficient calcification of osteoid tissue, is caused by a lack of sufficient
A. Vitamin D. B. Calcitonin. C. Thyroid hormone. D. Vitamin A. E. Vitamin C.