In Gate-Control Theory, Substance P __________

question 53

Multiple Choice

In gate-control theory, substance P __________.

• A) opens the spinal gates for pain
• B) closes the spinal gates for pain
• C) is unrelated to pain
• D) is similar in function to endorphins

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Definitions:

Pectinate Muscles

Internal ridges of myocardial tissue in the atria of the heart, particularly pronounced in the right atrium.

Chordae Tendineae

Tendinous strands running from the papillary muscles to the atrioventricular valves.

Endocardium

Innermost layer of the heart, including endothelium and connective tissue.

Semilunar Valve

Valves located at the bases of the aorta and the pulmonary artery that prevent the backflow of blood into the ventricles of the heart during contraction.