Multiple Choice
Caffeine is a(n) __________ of adenosine that blocks its receptors from activation.
12. Biosignaling
Drugs & Toxins Affecting GPCR Signaling
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Caffeine is a molecule that binds to ______________ receptors, inhibiting their response.
A
Tyrosine.
B
Adenosine.
C
Adenine.
D
Cytosine.
E
Asparagine.
F
Dopamine.
Verified step by step guidance1
Begin by understanding the role of caffeine in the body. Caffeine is a central nervous system stimulant that affects various neurotransmitter systems.
Identify the primary mechanism of action for caffeine. Caffeine primarily works by blocking the action of adenosine, a neurotransmitter that promotes sleep and relaxation.
Recognize the receptors involved. Adenosine receptors are the specific sites where adenosine binds to exert its effects. Caffeine competes with adenosine for these receptors, inhibiting their normal function.
Consider the options provided in the problem. The correct receptor type that caffeine binds to is the adenosine receptor, not tyrosine, adenine, cytosine, asparagine, or dopamine.
Conclude that caffeine's inhibitory effect on adenosine receptors is responsible for its stimulating properties, leading to increased alertness and wakefulness.
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