Oxytocin is
a. an extremely potent uterine muscle stimulant
b. involved in a positive feedback cycle during parturition
c. produced in the hypothalamus
d. both a and b
e. all of the above
E
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Action potentials in the heart spread from cell to cell through
A. gap junctions. B. valves. C. interneurons. D. coronary vessels. E. desmosomes.
Which of the hormones below is responsible for facultative water reabsorption?
A) thyroxine B) atrial natriuretic peptide C) ADH D) aldosterone
Zoonotic diseases are transmissable from animals to humans. These include ringworm, a fungus which infects pets and people, plague, a bacterial disease resulting from a flea bite to mammals including humans, and rabies, a viral disease of the central nervous system that affects all mammals and is almost always fatal. On the other hand, the feline immunodeficiency virus has no effect on humans and
human immunodeficiency virus has no effect on cats, though each may be deadly to its normal host. Speculate on what may prevent cross-species infection in some cases and allow it in others. What will be an ideal response?
In this illustration of the ear, what structure does number 1 indicate?
A. Vestibule B. Cochlea C. Stapes D. Incus E. Tympanic membrane