_____ The half-life (t ½ ) of a hormone provides information about a) the amount
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Question
_____ The half-life (t ½) of a hormone provides information about a) the amount of hormone released from an endocrine gland b) how long the hormone will be in the circulation of an animal c) the number of receptors available on the target tissue d) the factors that regulate its secretion
_____ The deep sea cusk eel cruises slowly in the depths using ____________ muscle, then bursts occasionally to escape or catch prey using ___________ muscles a) red (slow oxidative)/ white (fast glycolytic) b) red (fast glycolytic)/ red (slow oxidative) c) white (fast glycolytic)/ red (slow oxidative) d) isometric contractions/isotonic contractions
Explanation / Answer
The half-life (t ½) of a hormone provides information about b) how long the hormone will be in the circulation of an animal.
The concentration of the hormone in circulation will drop to half after every half-life.
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The deep sea cusk eel cruises slowly in the depths using red (slow oxidative) muscle, then bursts occasionally to escape or catch prey using white (fast glycolytic) muscles.
Option a; Slow oxidative muscles are reddish and required for sustained activity whereas fast glycolytic muscles are whitish and required for bursts of activity.
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