18. A synapse is a(n) A) chemical messenger that triggers muscle contractions. B

Question

18. A synapse is a(n) A) chemical messenger that triggers muscle contractions. B) automatic response to sensory input. C) junction between a sending neuron and a receiving neuron. D) neural cable containing many axons. 19. The chemical messengers released into the junctions between neurons are called A) hormones. B) neurotransmitters. C) synapses. D) genes. 20. The two major divisions of the nervous system are the central nervous system and the nervous system. A) autonomic B) sympathetic C) somatic D) peripheral 21. The central nervous system consists of A) sensory and motor neurons. B) somatic and autonomic divisions C) the brain and the spinal cord. D) sympathetic and parasympathetic divisions.

Explanation / Answer

1. The correct answer is option C. In nervous system, a synapse is a structure that permits a neuron to transmit an electrical or chemical signal to another neuron. It is basically a junction between two neurons.

2. The correct answer is option B. Neurotransmitters are endogenous chemicals that enable neurotransmission. They transmit signals across a chemical synapse.

3. The correct answer is option D. The peripheral nervous system is one of the two components of the nervous system. The PNS consists of the nerves and ganglia outside of the brain and spinal cord.

4. The correct answer is option C. The central nervous system (CNS) is the part of the nervous system consisting of the brain and spinal cord.

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.