The ________ muscle acts to elevate the mandible and close the jaw
A) lateral pterygoid
B) digastric
C) superior rectus
D) temporalis
E) masseter
Answer: E
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This figure shows an example of regulation of hormone secretion by a negative feedback loop. The large box labeled 1 represents the initial stimulus. What endocrine glands are indicated by the letters d and e?
A. d = thalamus, e = anterior pituitary B. d = hypothalamus, e = thyroid gland C. d = hypothalamus, e = posterior pituitary D. d = hypothalamus, e = anterior pituitary E. d = thalamus, e = posterior pituitary
Select the correct statement about fertilization
A) If estrogen is present, the pathway through the cervical opening is blocked from sperm entry. B) Both spermatozoa and the ovulated secondary oocyte remain viable for about 72 hours in the female reproductive tract. C) Once inside the uterus, most sperm cells are protected and remain viable. D) Millions of sperm cells are destroyed by the vagina's acidic environment.
CSF circulates between the ventricles and what?
A. Choroid plexus B. Epidural space C. Meninges D. Subarachnoid space
Which is not true about aging of the skeleton?
A. Bone mass increases with age. B. Articulating surfaces deteriorate with age. C. Bone density decreases with age. D. Many bones fuse with age. E. No exceptions; all choices are true.