Nervous System Anatomy: Central and Peripheral Systems

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Questions and Answers

What is the effect of hyperpolarization on the membrane of a postsynaptic neuron?

It makes it more difficult for the postsynaptic neuron to generate an action potential.

What is the characteristic of Group A nerve fibers?

Large diameters and thick myelin sheaths.

What type of fibers are involved in the autonomic nervous system serving visceral organs?

Type B and Type C fibers.

What is the basic functional unit of the nervous system?

A reflex. Signup and view all the answers

What are the five elements of a motor reflex?

A sensory receptor, a sensory neuron, interneurons, a motor neuron, and an effector organ. Signup and view all the answers

What is the purpose of interneurons in a reflex?

They integrate and process information from the sensory neuron. Signup and view all the answers

What is the function of an effector organ in a reflex?

To respond to the stimulus. Signup and view all the answers

What is the neural pathway involved in the patella reflex?

The patellar reflex involves the neural pathway that connects the sensory receptor in the knee to the motor neuron that controls the quadriceps muscle. Signup and view all the answers

What type of nerve fibers are involved in the transmission of visceral sensory information?

Type B and Type C fibers. Signup and view all the answers

What is the difference between Group A and Group C nerve fibers?

Group A fibers have large diameters and thick myelin sheaths, while Group C fibers have small diameters and are unmyelinated. Signup and view all the answers