Wrong answers Flashcards
(9 cards)
What is the primary role of G-protein-coupled receptors (GPCRs)?
A) To increase neurotransmitter release
B) To allow ions to pass through the membrane
C) To recognize and respond to endogenous signals
D) To transport chemicals against their gradient
c
- What is the effect of muscarinic M3 acetylcholine receptor antagonists on vascular smooth muscle?
A) They induce muscle relaxation
B) They prevent contraction
C) They block calcium ion flow, inhibiting muscle contraction
D) They promote serotonin release
C
What is the primary action of fluoxetine (Prozac) in relation to serotonin?
A) It increases serotonin production
B) It blocks serotonin reuptake into presynaptic neurons
C) It breaks down serotonin in the synaptic cleft
D) It activates serotonin receptors
B
What type of drug is Neostigmine, and what is its effect?
A) A serotonin reuptake inhibitor that treats depression
B) A beta-blocker that reduces heart rate
C) An anticholinesterase that increases acetylcholine concentration
D) A calcium channel blocker that lowers blood pressure
C
Which of the following drug classes is most commonly used to treat hypertension by affecting calcium ion flow?
A) Beta-blockers
B) Calcium channel blockers
C) SSRIs
D) Proton pump inhibitors
B
How do antidepressants like fluoxetine (Prozac) affect serotonin levels in the brain?
A) By blocking serotonin receptor activity
B) By preventing the breakdown of serotonin by enzymes
C) By increasing serotonin release from presynaptic neurons
D) By inhibiting serotonin reuptake, prolonging its action
D
What is the primary role of nicotinic acetylcholine receptors in skeletal muscle contraction?
A) They facilitate neurotransmitter synthesis
B) They open ion channels, allowing sodium influx
C) They break down acetylcholine in the synapse
D) They block the release of calcium from the sarcoplasmic reticulum
B
What is the general mechanism of action for anticholinesterase drugs in anesthesia recovery?
A) They block acetylcholine receptors
B) They increase the breakdown of acetylcholine
C) They inhibit acetylcholinesterase, increasing acetylcholine concentration
D) They inhibit acetylcholine release from neurons
C
