What form of stimulus will cause the skeletal
muscles to contract and produce shivering?
a. decrease in temperature
b. increase in temperature
c. electrical stimulus
d. mechanical stimulus
e. more than one of these
A
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Which type of receptor is involved in rapid responses of muscle cells and neurons? (Select all correct choices.)
A. G protein-coupled receptor B. receptor kinase C. ligand-gated ion channel D. nuclear receptor
Discrete packets of kinetic energy in light are called
A. lasers. B. grana. C. photons. D. protons. E. electrons.
The original source of genetic variation that serves as the raw material for natural selection is ________
A) mutation B) gene flow C) geographic isolation D) random fertilization
Some lipids are formed when fatty acids are linked to glycerol. These subunits are linked together by _____.
A. glycosidic linkages B. ionic bonds C. peptide bonds D. phosphodiester linkages E. ester linkages