What are the membrane-bound sacs that live within a eukaryotic cell and perform specialized functions called?
a. proteins
b. lipids
c. atoms
d. organelles
d. organelles
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In the dark, the Na+ channels in the outer segments of rod cells are
A. open. B. closed. C. primarily affected by inhibitory neurotransmitter input. D. important in making the cell hyperpolarized in this resting state.
An animal is in an environment with a higher than normal temperature. It no longer has enough energy to reproduce or maintain homeostasis. What kind of environment is it in?
a. Suboptimal zone b. Zone of intolerance c. Zone of thermal instability d. Zone of stress
Four of the five structures listed below are
associated with membranes. Select the exception. a. endoplasmic reticulum b. granum c. plasma membrane d. chromosome e. nuclear envelope
Theophylline, a methylxanthine like caffeine, is used to treat asthma. Explain the mechanism by which a methylxanthine can alleviate asthma symptoms resulting from bronchial constriction
What will be an ideal response?