A male has ________ chromosomes, while a female has ________ chromosomes.
A. XY; XX
B. XX; XY
Answer: A
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The thirst center in the hypothalamus is stimulated by ________ of the extracellular fluid, and is inhibited by ________.
A. a decrease in sodium ions; an increase in sodium ions B. a decrease in the osmotic pressure; stimulation of osmoreceptors C. nerve impulses from the cerebrum; nerve impulses from the thalamus D. an increase in the osmotic pressure; distension of the stomach by water
The brain area acknowledged as the center for emotions is the
A) pons. B) hypothalamus. C) suprachiasmatic nucleus. D) cerebellum. E) amygdala.
The two optic nerves, one from each eye, reach the diencephalon at the ________.
Fill in the blank(s) with the appropriate word(s).
Are birds more like humans or kangaroo rats in the challenges they face in deserts and the way they cope with these challenges?
What will be an ideal response?