The life span of an erythrocyte is about _________ days
A. 10
B. 30
C. 60
D. 120
E. 360
D
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The mechanism of action of lipid-soluble hormones is generally via the stimulation or inhibition of specific DNA-dependent protein synthesis.
Answer the following statement true (T) or false (F)
Fruits, maple syrup, and sugar are all sources of
A. cellulose. B. sucrose. C. lactose. D. nitrogen.
When a person is exposed to temperature extremes, why is it difficult to distinguish hot from cold objects?
A. At extremes, pain receptors are stimulated by both very hot and very cold objects. B. Temperature perception requires more than one type of receptor. C. Most temperature receptors cannot differentiate hot from cold. D. Pain receptors are inhibited by both very hot and very cold objects. E. Temperatures above 37 degrees centigrade actually stimulate the cold receptors.
Lymph is filtered and cleansed by the ________ before it is returned to the blood.
A. lymph nodes B. spleen C. tonsils D. thymus