Epithelial tissue is least likely to:
a. contract.
b. be specialized as sensory receptors.
c. provide protection.
d. regulate exchange of substances between parts of the body.
e. produce and secrete cell products.
A
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The letter “D” in the above figure represents
a. a kidney. b. a urethra. c. a urinary bladder. d. a ureter. e. water.
Inhibitors of which of the following would interfere with nitric oxide stimulation of cardiac artery dilation through relaxation of smooth muscle cells?
A) protein kinase G. B) nitric oxide synthase C) guanylyl cyclase D) calmodulin E) Inhibitors of all of the above would interfere with nitric oxide stimulation.
Light availability within a forest is lowest in the
A) canopy layer. B) midstory layer. C) understory layer. D) ground layer.
If the base in a DNA strand is changed from cytosine to adenine, the base pair in mRNA is
A. uracil. B. cytosine. C. thymine. D. guanine.