Thyroid stimulating hormone (TSH) is produced by the ________
A) thyroid gland B) hypothalamus C) anterior pituitary D) posterior pituitary
Answer: C
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Under an electron microscope, the plasma membrane appears as a trilaminar structure consisting of two light layers separated by a dark middle layer
Indicate whether the statement is true or false
If the AV node is damaged so that it can no longer transmit the signal from the SA node (total heart block), will the ventricles continue to contract? Why or why not?
A) No: there are no cells left to pace and coordinate the heart beat. B) No: the SA node must be intact to pace the system. C) Yes: however, ventricular contractions will no longer follow atrial contractions, and the rate of ventricular contractions will be significantly slowed. D) Yes: the AV bundle will keep the heart going at the usual rate.
The study of disease is known as ________
A) Microbiology B) Cytology C) Neurology D) Pathophysiology
Aldosterone regulates balance of
A) Calcium and chloride. B) Magnesium and sodium. C) Sodium and potassium. D) Phosphates and calcium.