How would a drug that blocks acetylcholine receptors at the motor end plate affect skeletal muscle?
A) It would make the muscles more excitable.
B) It would produce uncontrolled muscle spasms.
C) It would cause spastic paralysis (muscles are contracted and unable to relax).
D) It would cause flaccid paralysis (muscles are relaxed and unable to contract).
E) It would have little effect on skeletal muscles.
Answer: D
You might also like to view...
The most important role of the spleen is to provide a site for lymphocyte proliferation and immune surveillance and response
Indicate whether the statement is true or false
Acid chyme entering the duodenum causes the intestinal mucosa to secrete the hormone ________, which stimulates the secretion of ________ that is rich in bicarbonates.
A. cholecystokinin; pancreatic juice B. secretin; pancreatic juice C. cholecystokinin; bile D. secretin; intestinal juice
These structures prevent prolapse of the atrioventricular valves.
A. Chordae tendineae B. Crista terminalis C. Trabeculae carneae D. Intercalated discs
What two factors limit the rate of facilitated diffusion across a plasma membrane?
A) the size of the substance and the charge of the substance B) the size of the substance relative to the size of the carrier protein C) the charge of the substance relative to the resting membrane potential of the cell D) the concentration gradient of the substance and the number of carrier proteins E) the temperature of the interstitial fluid and the pH of the interstitial fluid