Relative to ectotherms like fish, endotherms like mammals have ______.
a. higher rates of Na+ and K+ leak across their cellular membranes
b. higher concentrations and activities of the Na+/K+ ATPases in their cellular membranes.
c. lower rates of oxygen consumption per gram
d. a and b are correct
e. a, b and c are correct
Answer: d. a and b are correct
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Receptors for polar molecules are found ____ while receptors for nonpolar molecules are located
____.
a. on the cell surface; within the cell b. within the cell; on the cell surface c. on the cell surface; on the nuclear membrane d. on the nuclear membrane; on the cell surface e. on the cell surface; within the membrane interior
Fragile X syndrome and Huntington disorder are examples of what type of mutation?
a. frameshift b. base-substitution c. expansion d. transposable element e. point
The part of the brain that regulates the internal environment of the body by linking the endocrine and nervous systems is the
A. thalamus. B. pineal gland. C. hypothalamus. D. amygdala.
The vaccine for immunity to Haemophilus influenzae serotype b is
What will be an ideal response?