Which of the following best describes a process involved in the nervous system r

Question

Which of the following best describes a process involved in the nervous system receiving internal signals?

Electrical signals are passed from dendrites to axons in sensory neurons through the peripheral nervous system.

Motor neurons carry information from muscle cells to the central nervous system for processing.

Neurotransmitters pass information across synapses between sensory neurons on the way to the central nervous system.

Sensory neurons transmit information from the central nervous system to the peripheral nervous system.

Explanation / Answer

The correct answer is Neurotransmitters pass information across synapses between sensory neurons on the way to the central nervous system.

Explanation: The nervous system is divided into two categories: The central nervous system (CNS) and the peripheral nervous system (PNS).The central nervous system contains the brain and the spinal cord. The peripheral nervous system contains all the nerves that lie outside of the CNS. Basically, the PNS connects the CNS to the organs, skin, and limbs.

Sensory neurons transmit information from nerves to the CNS while motor neurons carry information from the CNS to the muscle fibers.

When the nerve impulses arrive at the synaptic knob, it depolarises the presynaptic membrane, causing calcium channels to open. Then the calcium ions rush into the synaptic knob and the vesicles fuse with the presynaptic membrane and release neurotransmitters into the synaptic cleft. The neurotransmitters diffuse across the synaptic cleft and attach to specific receptors on the postsynaptic membrane. The binding of neurotransmitters to the receptors results in the structural changes in the receptors that cause ion channels opening up in the postsynaptic membrane and generate the action potential.

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

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