Nervous System Functions and Neurons

Which of the following is a primary function of the nervous system?

• Controlling all bodily functions

• Processing electrical and chemical signals

• Enabling thought, action, and emotion

• All of the above

The three principal functions of the nervous system are sensory input, integration, and what other function?

• Motor output

• Emotional response

• Memory storage

• Hormone regulation

The nervous system is broadly divided into which two main parts?

• Brain and spinal cord

• Sensory and motor systems

• Central and peripheral nervous systems

• Voluntary and involuntary systems

Which division of the peripheral nervous system is responsible for voluntary skeletal muscle movement?

• Sensory division

• Autonomic nervous system

• Somatic nervous system

• Sympathetic division

Besides neurons, what other type of cell makes up a significant portion of nervous tissue and provides support and protection?

• Muscle cells

• Glial cells

• Blood cells

• Epithelial cells

Which of the following is a characteristic of most neurons?

• They are constantly replaced by new cells.

• They have a low metabolic rate.

• They are some of the longest-lived cells in the body.

• They can divide rapidly throughout life.

What is the primary function of dendrites in a neuron?

• To transmit electrical impulses away from the cell body.

• To provide life support for the neuron.

• To pick up messages from other cells.

• To produce myelin sheath.

A neuron with a single process extending from its cell body is most likely found in which part of the body?

• The brain's cerebral cortex.

• Sensory receptors.

• Muscles and glands.

• The spinal cord.

Which type of neuron transmits impulses from the central nervous system to muscles and glands?

• Sensory neurons.

• Afferent neurons.

• Interneurons.

• Motor neurons.

What is the main role of interneurons in the nervous system?

• To carry signals from sensory receptors to the brain.

• To transmit impulses between sensory and motor neurons.

• To send commands from the brain to muscles.

• To provide structural support to other neurons.