If the membranes of the cardiac muscle cells in the SA node become more permeable to potassium ions,
A) the membrane will depolarize.
B) the intracellular concentration of calcium ion will increase.
C) the stroke volume will increase.
D) the heart rate will increase.
E) the heart rate will decrease.
E) the heart rate will decrease.
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The function of the auditory tube is to
A) help maintain equilibrium. B) amplify sounds. C) equalize air pressure on both sides of the tympanic membrane. D) redistribute endolymph after hearing a sound. E) provide a passageway for sound waves to enter the ear.
Alleles may code for alternative expressions of a genetic trait
Indicate whether the statement is true or false
Match the glial cell to the nervous system division in which it is found.
1. Schwann cells 2. oligodendrocytes 3. microglia 4. satellite cells 5. ependymal cells 6. astrocytes A. central nervous system B. peripheral nervous system
All of the following would result in lower oxygen saturation of hemoglobin except
a. an increase in b. an increase in temperature c. an increase in d. a decrease in pH e. an increase in DPG