Neurons and Supporting Cells in the Nervous System

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What type of neurons are found in sensory organs like the ears and eyes?

Multipolar neurons
Unipolar neurons
Neuroglial cells
Bipolar neurons (correct)

What is the primary function of unipolar neurons?

To transmit motor signals
To maintain cognitive function
To transmit sensory information (correct)
To regulate emotional responses

What is the main role of neuroglial cells in the nervous system?

To transmit nerve impulses
To support and protect nerve cells (correct)
To produce hormones
To regulate muscle contractions

What type of neuroglial cells are star-shaped and provide insulation to neural tissues?

Astrocytes (C) Signup and view all the answers

What is the primary function of microglia in the central nervous system?

To eliminate debris and foreign substances (A) Signup and view all the answers

What is the term used to describe neuroglial cells?

Nerve glue (D) Signup and view all the answers

What is the main function of the axon?

To carry impulses away from the cell body (D) Signup and view all the answers

What is the role of the cell body in a neuron?

To contain the nucleus (D) Signup and view all the answers

What is the function of the neurons mentioned in statement 9?

To transmit signals from the PNS to the CNS (C) Signup and view all the answers

What is the term for the process of electrical signal processing in the brain and spinal cord?

Integration (D) Signup and view all the answers

What is the function of the cells mentioned in statement 5?

To support the neurons and protect them (C) Signup and view all the answers

What is the term for the gap between the axon terminals of one neuron and the dendrites of another neuron?

Synapse (A) Signup and view all the answers

What is the function of sensory neurons?

Carry impulses from sensory receptors to the CNS (A) Signup and view all the answers

What is the function of the somatic nervous system (SNS)?

Control the skeletal muscles (C) Signup and view all the answers

What is the function of the parasympathetic division of the autonomic nervous system?

Serve as the 'rest and digest' system (C) Signup and view all the answers

What is the term for clusters of neuronal cell bodies found outside the spinal cord?

Ganglia (D) Signup and view all the answers

What is the term for the division of the autonomic nervous system that serves as the 'fight or flight' system?

Sympathetic division (B) Signup and view all the answers

What is the term for the system that controls the smooth and cardiac muscles?

Autonomic nervous system (C) Signup and view all the answers

What is a characteristic of reflexes?

They are rapid and involuntary responses (D) Signup and view all the answers

Which division of the peripheral nervous system controls reflexes?

Somatic nervous system (B) Signup and view all the answers

What is the name of the neural pathways that reflexes occur over?

Reflex arcs (C) Signup and view all the answers

What is the main function of interneurons in a reflex arc?

To serve as a middleman between the two neurons (B) Signup and view all the answers

What is a common example of a reflex response?

Knee jerk (A) Signup and view all the answers

How many main components do most reflex arcs have?

5 (B) Signup and view all the answers

What is the main purpose of grouping the peripheral nervous system into different divisions?

To recognize the differences in their functions despite working together (C) Signup and view all the answers

How do sensory and motor neurons communicate with each other?

Through chemical signals (C) Signup and view all the answers

Why do we experience headaches if the brain does not have pain receptors?

Because pain receptors are activated by other parts of the body (A) Signup and view all the answers

What causes numbness in our legs when we sit in the same position for a long time?

Pressure on the nerves in the legs (D) Signup and view all the answers

What is the primary function of sensory receptors in our body?

To perceive information from the environment (C) Signup and view all the answers

What is the reflex arc, and how does it work?

A automatic response to a stimulus, involving the brain and spinal cord (D) Signup and view all the answers