A drug decreases heart rate by blocking a receptor on cardiac muscle cells. This drug probably binds to:
A) ?1 receptors.
B) ?2 receptors.
C) ?1 receptors.
D) nicotinic cholinergic receptors.
Answer: A
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A person with alkalosis has a blood pH less than 7.3.
Answer the following statement true (T) or false (F)
Which of the following symptoms is not associated with alkalosis?
a. Disorientation and comatose state b. Tingling "pins and needles" sensations c. Muscle twitches and muscle spasms d. Extreme nervousness e. Convulsions
During isovolumetric contraction, the pressure in the ventricles ________.
A. falls rapidly B. rises and then falls C. falls and then rises D. rises rapidly E. remains constant
Which of the following is not associated with innate immunity?
A. Inflammation B. Mucous membranes of the respiratory tract C. Vaccination D. Lysozyme E. Fever