The juxtaglomerular cells release the enzyme ________ when the macula densa cells detect low blood volume or solute concentration.
Fill in the blank(s) with the appropriate word(s).
renin
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B-lymphocytes are categorized as part of the adaptive branch of the immune system for all of the following reason but one. Which of the following is not one of the reasons B-lymphocytes are considered part of the adaptive immunity?
A) Their receptors will bind to only one antigen. B) They are a first line of defense that can begin killing pathogens immediately. C) They require costimulation from an activated T-helper cell. D) They produce memory cells when activated.
Although it clearly has an effect upon the quality of life, there is no evidence to show that exercise prolongs ________.
Fill in the blank(s) with the appropriate word(s).
Which of the following is more effective in producing bronchodilation?
A) Thyroxine B) Norepinephrine C) Nicotine D) Muscarine E) Acetylcholine
The first 1 to 2 minutes of moderate to heavy exercise relies on ________ for ATP production.
A. aerobic respiration of fatty acids B. anaerobic respiration of amino acids C. aerobic respiration of glucose D. anaerobic respiration of glucose