During an acute asthma attack, the obstruction is caused by _______.
A. a spasm of the diaphragm
B. bronchiole smooth muscle spasms
C. loss of elastic recoil
D. destruction of the walls of the alveoli
Ans: B. bronchiole smooth muscle spasms
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A motor neuron typically receives input from neurons that originate in various areas of the brain. This type of circuit is a
A) divergent circuit. B) convergent circuit. C) serial processing circuit. D) parallel processing circuit. E) reverberating circuit.
What bony arrangement would most effectively resist forces associated with weight bearing?
A. Trabeculae arranged in a random fashion permeated with large marrow spaces B. Lamellae of compact bone with collagen fibers arranged in tightly coiled helices C. Lamellae of compact bone with collagen fibers arranged in bundles parallel to the long axis of the diaphysis D. A diaphysis consisting of compact bone surrounded by a layer of trabecular bone E. Epiphyses with numerous spicules of bone that are randomly arranged
The organelles that are the “digestive bags” of the cell are the:
a. flagella b. endoplasmic reticulum c. Golgi apparatus d. lysosomes
The motor neurons of this division of the nervous system are located in the brain stem or ventral horns of the spinal cord and send their axons directly to muscles
A) parasympathetic division of the ANS B) parasympathetic and sympathetic divisions of the ANS C) sympathetic nervous system of the ANS D) somatic nervous system