For sensory receptor cells, the "threshold of detection" is the weakest stimulus that produces
A) A response.
B) A response 50 percent of the time.
C) A response 100 percent of the time.
D) A maximum response magnitude.
Answer: B
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The uterine epithelium is broken down by which structure of the blastocyst?
A) allantois B) cytotrophoblast C) syncytiotrophoblast D) blastocoele E) amnion
Answer the following statements true (T) or false (F)
1. A buffer is a chemical that helps prevent a sudden change in pH. 2. The word “carbohydrate” literally means “sugar.” 3. Both sucrose and lactose are monosaccharides. 4. Glucose is used by the body as a source of energy. 5. Both sucrose and lactose are disaccharides.
________ potentials are short-lived, local changes in membrane potential that can be either depolarized or hyperpolarized.
Fill in the blank(s) with the appropriate word(s).
Which statement about enzymes is FALSE?
A) Most enzymes can catalyze millions of reactions per minute. B) Enzymes may be damaged by high temperature. C) Enzymes may use coenzymes derived from vitamins or cofactors from metallic elements. D) Enzymes require contact with substrate in order to assume their active form.