Unit 4, Lecture 1

Front

What is the cell body in a neuron?

Back

The cell body, also known as the soma, is the part of a neuron that contains the nucleus and organelles. It is responsible for maintaining the cell's health and processing information.

Front

What is the function of the peripheral nervous system (PNS)?

Back

The peripheral nervous system is responsible for detecting and responding to stimuli from the environment and relaying information to and from the central nervous system.

Front

What is another name for a sensory neuron?

Back

A sensory neuron is also known as an afferent neuron, which carries sensory information from the body to the central nervous system.

Front

Which division of the nervous system does not include the brain and spinal cord?

Back

The peripheral nervous system (PNS) does not include the brain and spinal cord; it consists of all the other neural elements.

Front

What is the axon terminal?

Back

The axon terminal is the end part of a neuron that releases neurotransmitters to communicate with other neurons or muscles.

Front

Define synapse.

Back

A synapse is the junction between two neurons where information is transmitted from one neuron to another through neurotransmitters.

Front

What is the role of dendrites in a neuron?

Back

Dendrites are the branched extensions of a neuron that receive signals from other neurons and transmit them to the cell body.

Front

What is the function of the central nervous system (CNS)?

Back

The central nervous system processes information and coordinates responses by interpreting sensory input and sending signals to the body.

Front

What are efferent neurons?

Back

Efferent neurons, also known as motor neurons, carry signals away from the central nervous system to muscles and glands to elicit a response.

Front

What is the difference between afferent and efferent neurons?

Back

Afferent neurons carry sensory information to the central nervous system, while efferent neurons carry motor commands from the central nervous system to the body.