Which of the following statements concerning the larynx is correct?
A. The larynx contains four unpaired cartilages.
B. When the glottis closes, air is prevented from leaving the lungs.
C. Unlike other portions of the larynx, the epiglottis consists of some bony tissue.
D. The inferior laryngeal cartilage is the thyroid cartilage.
E. The epiglottis is also called "Adam's apple".
B
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Which of the following statements describes a common response of an autonomic effector during the "fight-or-flight" response?
a) Gastric motility and secretory activity increases. b) Blood vessels serving skeletal muscles constrict. c) Adipose tissues stores away triglycerides for later use. d) The pupils of the eyes dilate. e) Blood vessels serving the kidneys and digestive organs dilate.
Which is not characteristic of neurons?
A. High mitotic rate B. High metabolic rate C. Require continuous supplies of glucose and oxygen D. Extreme longevity E. No exceptions; all of these are characteristic of neurons.
What condition is caused by large amounts of nitrogen dissolving into the blood due to hyperbaric conditions?
A. Oxygen toxicity B. Emphysema C. Decompression sickness D. Nitrogen narcosis
After an impulse, the ________ refractory period is the time when it is possible to initiate another impulse, but it requires a stronger than usual stimulus.
Fill in the blank(s) with the appropriate word(s).