Question

question 19 (2.5 points)
which is of the following is a beta - blocker?

a) bethanechol

b) epinephrine

c) propranolol

d) atropine

question 20 (2.5 points)
side effects with muscle relaxants include ______.

a) gi ulceration and bleeding, mi, gerd, tinnitus and hearing loss, hematuria, prolonged bleeding time, and liver toxicity

b) respiratory arrest

c) nausea, dyspepsia, esophagitis, and abdominal, chest, bone and musculoskeletal pain

Explanation:

Question 19

• Bethanechol is a cholinergic agonist (stimulates cholinergic receptors), not a beta - blocker.
• Epinephrine is a sympathomimetic (stimulates adrenergic receptors), not a beta - blocker.
• Propranolol is a non - selective beta - blocker that blocks both β₁ and β₂ adrenergic receptors.
• Atropine is an anticholinergic (blocks cholinergic receptors), not a beta - blocker.

• Option a: The listed side effects (GI ulceration, MI, etc.) are not typical side effects of muscle relaxants. These are more associated with other classes of drugs like non - steroidal anti - inflammatory drugs (NSAIDs) or anticoagulants in some cases.
• Option b: Respiratory arrest is a severe, life - threatening side effect that can occur with muscle relaxants, especially in cases of overdose or when combined with other central nervous system depressants.
• Option c: The listed side effects (nausea, dyspepsia, etc.) are more typical of drugs like NSAIDs or some gastrointestinal medications, not muscle relaxants.

Answer:

c) Propranolol

Question 20