The name for one type of immune system cell that helps to fight cancerous tumors is __________.
A. B cell
B. activator cell
C. natural killer cell
D. neuroimmunological cell
Answer: C
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When the response scale only has two possible values, this type of distribution is a ______ distribution.
A. bimodal B. bimedial C. binominal D. biordinal
When we are exposed to low levels of light the __________ begins to secrete the hormone melatonin, which acts to induce sleep
a) thyroid gland b) pituitary gland c) pineal gland d) adrenal glands
When Tenzing shared his toys with his brother, his mother stopped criticizing him. Tenzing now shares his toys with his brother quite often. The consequence for sharing the toys was the _____ of a stimulus, and the behavior of sharing the toys subsequently _______ in frequency; therefore, this is an example of ______ _______.
Fill in the blank(s) with the appropriate word(s).
If the skin surface was stretched out with the epidermis on the top and the dermis below, cold sensors would be considered __________.
A. dorsal B. ventral C. rostral D. caudal