Explain the concept of homeostasis using the example of how we regulate our body temperature. What will be an ideal response?
ANSWER: Answers will vary but should be similar to this. Homeostasis refers to the maintenance of a
constant internal environment. In terms of temperature, our body attempts to maintain an
internal temperature of 37oC. When body temperature falls below this value, we shiver. The
contractions of our muscles generate heat and raises temperature back towards normal. When
body temperature rises above this value, we sweat. As the sweat evaporates from our skin, it
pulls heat from the body, reducing temperature back towards normal.
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Chronic high stress is associated with high cortisol levels that harm cells in the hippocampus, a brain region associated with ________
a. immune system regulation b. appetite control c. sexual function d. learning and memory
Aflatoxin is a(n) ________ associated with ingestion of contaminated ________
A) mycotoxin; peanuts B) mycotoxin; rye or other cereal grains C) enterotoxin; peanuts D) enterotoxin; rye or other cereal grains E) endotoxin; peanuts
________ are bacteria that can grow on minimal medium and are assumed to be wild type
A) Auxotrophs B) Hfr C) F+ cells D) Mutants E) Prototrophs
The electrons derived from the oxidation of H2O to O2 are used to reduce ______ to ________.
Fill in the blank(s) with the appropriate word(s).