Spermatozoa are moved along the ductus deferens by
A) hydrostatic force.
B) ciliary action.
C) peristaltic contractions.
D) suction.
E) guide cells.
C) peristaltic contractions.
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Protein malnourishment may occur if the diet is deficient in
A) essential amino acids. B) nonessential amino acids. C) urea. D) ammonia. E) keto acids.
Answer the following statements true (T) or false (F)
1. Dim light is able to stimulate the rods in the eye. 2. Colorblindness is a malfunction of the cones of the eye. 3. Cones are used for day vision or vision in bright light. 4. There are three kinds of cones, each sensitive to a different color: red, yellow, or blue. 5. The retina is the innermost layer of the eye.
Following workup for symptoms of decreased libido and erectile dysfunction, a patient is told that his pituitary is hypersecreting prolactin. Is there need for concern about this young man?
What will be an ideal response
In the early days of medicine, frontal lobotomies were performed to treat psychiatric disorders. This archaic procedure was typically done using a sharp instrument to poke through a thin bone in the skull that would allow access to the frontal lobe of
the brain. Based on your knowledge of the cranial bones, which bone of the orbit of the eye do you think physicians would "poke throughâ? A) Sphenoid bone B) Ethmoid bone C) Frontal bone D) Lacrimal bone