What are the two main classes of adrenergic receptors for norepinephrine and epinephrine?
a. nicotinic and muscarinic
b. ACh and ATP
c. alpha and beta
d. epinephrine and norepinephrine
e. sodium and potassium
c
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A suture is an example of a
A. plane joint. B. cartilaginous joint. C. fibrous joint. D. synovial joint.
Which type of cartilage is found in the intervertebral discs?
A. Hyaline cartilage B. Fibrocartilage C. Reticular cartilage D. Articular cartilage E. Elastic cartilage
The second-messenger mechanism of hormone action operates by ________.
A) synthesizing more of the hormone than is actually needed B) increasing the basal metabolic rate in the target organ C) not responding to a feedback mechanism D) binding to specific receptors and employing the services of G proteins and cAMP
The function of the postcapillary venule is to
A. drain the capillary bed. B. allow for diffusion of metabolic wastes from the tissues. C. allow for diffusion of nutrients to the tissues. D. supply metarteriole with blood. E. allow for diffusion of nutrients and metabolic wastes.