What type of motor neuron stimulates skeletal muscle fibers to contract by the excitation-contraction mechanism?

A) upper motor neuron B) interneuron
C) ?-motor neuron D) ?-motor neuron


Answer: C

Anatomy & Physiology

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Germ cells have ________ unpaired chromosomes and are thus called ________ cells

A) 23; diploid B) 46; diploid C) 23; haploid D) 46; somatic E) 23; somatic

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The relatively constant temperature of the deep, internal region of a homeotherm is known as the __________ temperature

Fill in the blank with the correct word.

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The mucous membrane or mucosa of the respiratory system

A) is present as the lining of the alveoli. B) consists of respiratory epithelial cells overlying a layer of loose connective tissue, the lamina propria. C) contains an epithelium that differs from that of the larynx. D) surrounds a thick layer of connective tissue, the submucosa. E) None of the answers are correct.

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