Which of the following is not a function of the endocrine system?
a. Maintenance of blood sugar levels
b. Regulation of metabolic activity and H2O and electrolyte balance
c. Promotion of growth and development
d. Transduction of external stimuli
e. Helping the body cope with stressful situations
D
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The kidneys are located ___________ the peritoneum
A. within B. anterior to C. posterior to
A change in a membrane potential from +30 mV to -70 mV is an example of
a. depolarization b. hyperpolarization c. polarization d. repolarization e. zero potential
Being lipid soluble, steroids can do all the following EXCEPT ________
A) diffuse through the plasma membranes of target cells B) catalyze a reaction that produces cyclic AMP (cAMP) C) enter the nucleus D) bind to receptor proteins within the nucleus E) activate genes to transcribe mRNA for protein synthesis
The depolarization phase of an action potential is punctuated by the closing of inactivation gates in the voltage gated sodium ion channels. All of the following are consequences of this inactivation except one
Choose the statement below that is not a consequence of the closing of inactivating gates. A) This allows for the efflux (diffusion out) of potassium ions, resulting in the repolarization of the cell. B) This allows for the one way transmission of action potential down the axon. C) This limits the frequency of action potentials down the axon. D) This stops the depolarization of the axon membrane.