Carbon monoxide can be released by brain cells and stimulates
a. adenylate cyclase and blood vessel contraction.
b. guanylate cyclase and blood vessel dilation.
c. NO-synthase and muscle cell contraction.
d. cyclooxygenase and prostaglandin synthesis.
Ans: b. guanylate cyclase and blood vessel dilation.
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If you could stick a microscopic pin into the
center of a bacterium, what would the order of the structures you would encounter from the outside in?
a. capsule, cell wall, plasma membrane, cytoplasm b. cell wall, capsule, plasma membrane, cytoplasm c. plasma membrane, cell wall, capsule, cytoplasm d. cell wall, plasma membrane, capsule, cytoplasm e. capsule, plasma membrane, cell wall, cytoplasm
The total number of individuals in a population is the
population a. distribution. b. growth. c. birth rate. d. size. e. age structure.
What prevents growth plates from calcifying, preserving their ability to grow?
a. growth hormone b. calcium c. phosphate d. signals from the nervous system e. thyroid hormone
Compare and contrast plant and animal cell structure. Include at least two similarities and two differences
What will be an ideal response?