Enkephalins produce presynaptic inhibition in neurons transmitting pain signals. Increased levels of enkephalins will
A. increase awareness of pain.
B. decrease awareness of pain.
C. increase amount of pain.
D. decrease amount of pain.
E. have no effect on awareness or amount of pain.
B
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The axillary region is ______ to the pectoral region
?A. lateral ?B. medial ?C. distal ?D. proximal ?E. inferior
Label H represents which of the following structures?
A) urinary bladder B) clitoris C) labium minus D) labium majus E) greater vestibular gland
Which statement about the rate of diffusion through a lipid bilayer membrane is incorrect?
a. Smaller substances diffuse faster than larger substances. b. Lipid-soluble items diffuse faster than water-soluble items. c. Items diffuse through narrow membranes faster than through thick membranes. d. The presence of microvilli decreases the rate of diffusion. e. A greater concentration gradient causes faster diffusion.
Put the following in the correct order after the blood pressure increases
(1) decreased sympathetic stimulation (2) increase in glomerulus filtration rate (3) increase in arterial blood pressure (4) increase in urine production (5) afferent arterioles dilate A. 1, 3, 5, 2, 4 B. 3, 2, 1, 5, 4 C. 2, 3, 5, 1, 4 D. 3, 1, 5, 2, 4 E. 3, 2, 5, 4, 1