Contraction of which muscle normally accounts for around 75% of the air movement in normal quiet breathing?

A) diaphragm
B) rectus abdominis
C) internal intercostals
D) external intercostals
E) internal obliques


A) diaphragm

Anatomy & Physiology

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Demyelination

A) is the addition of myelin to the axon. B) only affects Schwann cells. C) is the gradual reduction in myelin. D) is the thickening of the myelin sheath. E) only affects oligodendrocytes.

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An __________ is a peice of equipment used to record the electrical activity of the heart

Fill in the blank(s) with correct word

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Binding of epinephrine to alpha receptors causes smooth muscle

a. relaxation in arteries of the brain b. relaxation in skeletal muscle arteries c. constriction in skeletal muscle arteries d. relaxation in coronary arteries e. to not experience any of the above

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The ridge like superior edge of the ilium is known as the _____.

A. Iliac crest B. Anterior superior iliac spine C. Anterior gluteal line D. Ischial spine

Anatomy & Physiology