Binocular vision
a) gives better depth perception.
b) provides more accurate color vision.
c) is only seen in humans.
d) occurs when one eye focuses on two separate objects.
e) is all of these choices
a
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Kathryn is pregnant and very eager to breast-feed after the baby is born. Her friend gives her a supplement to encourage prolactin secretion and Kathryn starts to take it during pregnancy. The supplement works and Kathryn's blood level of prolactin increases. She does not begin lactating during pregnancy because
A. maternal plasma levels of prolactin are low during pregnancy. B. the high levels of estrogen and progesterone in maternal plasma inhibit the effects of prolactin. C. the breast ducts do not develop until after parturition. D. the low levels of circulating estrogen and progesterone during pregnancy inhibit milk synthesis by the breasts. E. high levels of androgens inhibit milk synthesis by the breasts.
Rupture of the papillary muscles in the left ventricle may result in
A) pulmonary valve regurgitation. B) mitral valve prolapse. C) tricuspid regurgitation. D) tricuspid prolapse. E) aortic valve prolapse.
Which of the following describes a function of cerebrospinal fluid?
1. Mechanical protection 2. pH homeostasis 3. Circulation a) 1 only b) 2 only c) 3 only d) Both 1 and 2 e) All of these choices
What happens to a rat that has had its adrenal gland removed? Why?
What will be an ideal response?