The neurotransmitter at all synapses and neuromuscular or neuroglandular junctions in the parasympathetic division of the ANS is
(a) Epinephrine
(b) Norepinephrine
(c) Cyclic-AMP
(d) Acetylcholine

검증된 단계별 안내

Step 1: Understand the parasympathetic division of the autonomic nervous system (ANS). It primarily uses a specific neurotransmitter to communicate at synapses and junctions with muscles and glands.

Step 2: Recall that neurotransmitters are chemical messengers that transmit signals across a synapse from one neuron to another target cell, such as a muscle or gland cell.

Step 3: Identify the common neurotransmitters listed: Epinephrine and Norepinephrine are typically associated with the sympathetic division of the ANS, while Cyclic-AMP is a second messenger, not a neurotransmitter.

Step 4: Recognize that Acetylcholine is the neurotransmitter released at all parasympathetic synapses and neuromuscular or neuroglandular junctions, facilitating parasympathetic responses.

Step 5: Conclude that the correct neurotransmitter for the parasympathetic division is Acetylcholine, based on its role in transmitting parasympathetic signals.

비슷한 문제에 대한 검증된 영상 답변:

이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.

도움이 되었나요?

주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Parasympathetic Division of the Autonomic Nervous System (ANS)

The parasympathetic division is one branch of the ANS responsible for 'rest and digest' functions. It conserves energy by slowing the heart rate and promoting digestion. Understanding its role helps identify the neurotransmitters involved in its signaling pathways.

Neurotransmitters in the Autonomic Nervous System

Neurotransmitters are chemical messengers that transmit signals across synapses. In the ANS, different divisions use specific neurotransmitters to communicate with target organs. Recognizing which neurotransmitter is used by the parasympathetic division is key to answering the question.

Acetylcholine as the Primary Parasympathetic Neurotransmitter

Acetylcholine is the neurotransmitter released at all parasympathetic synapses and neuromuscular or neuroglandular junctions. It binds to cholinergic receptors to mediate parasympathetic effects, distinguishing it from sympathetic neurotransmitters like norepinephrine.

The neurotransmitter at all synapses and neuromuscular or neuroglandular junctions in the parasympathetic division of the ANS is(a) Epinephrine(b) Norepinephrine(c) Cyclic-AMP(d) Acetylcholine