Dopamine derived from the hypothalamus is the prominent hormone controlling pituitary prolactin secretion. Dopamine inhibits prolactin secretion. What do you predict would happen if the pituitary were removed from the base of the brain and transplanted to some distant place in the body (for instance on top of the kidney), such that dopamine could no longer regulate prolactin secretion? You can assume that the transplanted pituitary will be exposed to a ready supply of blood vessels.
A. Dopamine secretion would increase.
B. Dopamine secretion would decrease.
C. Prolactin secretion would decrease.
D. Prolactin secretion would increase.
E. Both dopamine and prolactin secretion would decrease.
D. Prolactin secretion would increase.
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Which of the following statements about RNAi are true? Select all that apply.A) RNAi sequences are designed to be complementary to the rRNA that will function in the translation of a gene of interest.B) Once the complementary RNAi sequences enter the cell, they bind with the target RNA, producing double-stranded RNA molecules.C) These double-stranded RNA molecules are then broken down by a series of enzymes within the cell.D) RNAi is being researched as a potential treatment for a number of human diseases including cancer and hepatitis.
What will be an ideal response?
The type of floral attraction that would work on the pollinator in Figure 37-2 is:
a. white flowers. b. purple or blue flowers. c. a strong sweet scent. d. a strong carrion-like scent. e. sweet nectar.
Match the group of proteins on the left with an example from that group on the right.
A) spectrin B) CapB C) CapZ D) alpha E) Tau F) kinesin 1) motor MAP 2) nonmotor MAP 3) capping protein 4) linker proteins
The letter "A" in the above figure represents
a. ground tissue. b. dermal tissue. c. vascular tissue. d. apical meristem. e. shoot root combination.