Glucose is actively transported across the capillary walls
Indicate whether the statement is true or false
F
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Freckles are the result of
A. melanocyte number and genetic inheritance. B. melanocyte number and sun exposure. C. melanocyte activity, genetic inheritance, and sun exposure. D. melanocyte number, genetic inheritance, and diet. E. melanocyte activity and diet.
An extremely successful marathon runner would be more likely to have a larger percentage of ________ muscle fibers than would a sprinter.
Fill in the blank(s) with the appropriate word(s).
What enzyme breaks down acetylcholine into acetic acid and choline to prevent continued contraction of the muscle fiber?
A) potassium ions B) cross bridges C) calcium ions D) sarcoplasmic reticulum E) acetylcholinesterase
Which of the following statements about norepinephrine is FALSE?
A. Norepinephrine is a neurotransmitter. B. Norepinephrine binds to adrenergic receptors. C. Norepinephrine is a catecholamine. D. Dopamine is a precursor to norepinephrine. E. Epinephrine is a precursor to norepinephrine.