What proportion of sperm in the vagina makes it to the immediate vicinity of the egg?
A. 1 in 10,000
B. 1 in 10
C. 1 in 1000
D. 1 in 100
E. 1 in 1,000,000
E. 1 in 1,000,000
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Chemical digestion in the small intestine involves ________.
A) a significant amount of enzyme secretion by the intestinal mucosa B) cholecystokinin (CCK), an intestinal hormone responsible for gallbladder contraction C) secretions from the spleen that contain all enzymes necessary for complete digestion D) bile salts that help emulsify carbohydrates so that they can be easily digested by enzymatic action
Which of the following responses is NOT caused by activation of the parasympathetic division of the ANS?
a) Decreased heart rate b) Airway dilation c) Decreased pupil diameter d) Increased secretion of digestive juices e) Increased gastric motility
What term is used to describe a transmembrane potential in which the electrical and chemical gradients are equal and opposite with no net ion movement?
A. Action potential B. Graded potential C. Excitatory postsynaptic potential D. Equilibrium potential
Among the components of the dermis area: sweat glandsb: hair folliclesc: collagen fibersd: sensory nerve endingse: arrector pili muscles
A. a, b, c, e B. a, b, c, d, e C. a, b, d D. a, c, d E. a, b, d, e