Which of the following most accurately describes the location of the heart?
a. Anterior to the sternum
b. Inferior to the clavicles
c. Inferior to the diaphragm
d. To the right of the sternum
Answer: b. Inferior to the clavicles
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An immovable joint formed by the fusion of two bones is called a(n) __________.
Fill in the blank(s) with the appropriate word(s).
When calcium ion binds to troponin,
A) tropomyosin rolls away from the active site. B) active sites on the myosin are exposed. C) actin heads will bind to myosin. D) muscle relaxation occurs. E) myosin shortens.
Muscles whose functions are to depress either the hyoid bone or the thyroid cartilage of the larynx are the _________ muscles
A. mylohyoid B. suprahyoid C. infrahyoid D. stylohyoid
ANP is a hormone that causes
A. constriction of the afferent arterioles and release of renin. B. constriction of the afferent arterioles and inhibition of renin release. C. dilation of the afferent arterioles and release of renin. D. dilation of the afferent arterioles and inhibition of renin release.