What pituitary hormone works at the level of the collecting duct to either increase or decrease absorption of water in order to maintain plasma volume and thus blood pressure?
a. aldosterone
b. vasopressin
c. cortisol
d. testosterone
e. epinephrine
b
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Some athletes take chromium supplements to
A) aid in delivering oxygen to working muscles during exercise. B) conserve glycogen stores and delay fatigue during exercise. C) increase muscle mass and strength and decrease body fat. D) increase the use of fatty acids during endurance exercise.
Which form of vitamin A is involved in vision?
a. Beta-carotene b. Lycopene c. Retinal d. Retinoic acid
Which child is at significant risk for choking?
a. Susie, who is sitting down and eating tender beef strips b. Tammy, who is eating carrot sticks under the watchful eye of her babysitter c. Billy, who likes to run around the table before he begins to eat d. Kim, who is standing still and eating chocolate pudding e. Charles, who is snacking on grapes while watching television
Where is the neurotransmitter dopamine produced within the brain?
a. pons b. occipital lobe c. substantia nigra d. thalamus e. hypothalamus