____________________ is a decreased responsiveness to an indifferent stimulus that is repeatedly presented, whereas ____________________ is increased responsiveness to mild stimuli following a strong noxious stimulus
Fill in the blank(s) with correct word
Habituation, sensitization
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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.
Muscle fatigue occurs ________.
A. due to decreased extracellular K+ B. when muscle cell pH increases C. when muscles are only partially able to contract D. when muscle cell glycogen is depleted
How do the semicircular canals and the semicircular ducts differ?
A) The semicircular canals are part of the membranous labyrinth, and the canals surround the semicircular ducts, which are part of the bony labyrinth. B) The semicircular canals are part of the bony labyrinth, and they are surrounded by the semicircular ducts, which are part of the membranous labyrinth. C) The semicircular canals are part of the membranous labyrinth, and they are surrounded by the semicircular ducts, which are part of the bony labyrinth. D) The semicircular canals are part of the bony labyrinth, and the canals surround the semicircular ducts, which are part of the membranous labyrinth.
The _____________ bases in DNA are adenine, cytosine, guanine and thymine.
Fill in the blank(s) with the appropriate word(s).