The Nervous System

What are the three principal functions of the nervous system?

• Sensory input, integration, and motor output

• Digestion, respiration, and circulation

• Memory, attention, and perception

• Balance, coordination, and flexibility

Which part of the nervous system is the main control center?

• Peripheral nervous system

• Somatic nervous system

• Central nervous system

• Autonomic nervous system

What is the role of astrocytes in the central nervous system?

• Anchoring neurons to their blood supply

• Providing immune defense against microorganisms

• Creating and circulating cerebrospinal fluid

• Producing the myelin sheath

Which division of the autonomic nervous system mobilizes the body into action?

• Sympathetic division

• Parasympathetic division

• Somatic division

• Voluntary division

What is the main function of sensory neurons?

• Transmit impulses away from the central nervous system

• Transmit impulses toward the central nervous system

• Transmit impulses between sensory and motor neurons

• Anchor neurons to their blood supply

Which type of neuron is found mostly in sensory receptors?

• Multipolar neuron

• Bipolar neuron

• Unipolar neuron

• Interneuron

What is the role of interneurons?

• Pick up sensory stimuli

• Transmit impulses away from the central nervous system

• Transmit impulses between sensory and motor neurons

• Anchor neurons to their blood supply

What is the function of dendrites in a neuron?

• Transmit electrical impulses away from the cell body

• Transmit impulses toward the central nervous system

• Pick up messages from other cells

• Anchor neurons to their blood supply

Which type of neuron is the most abundant in the body?

• Multipolar neuron

• Bipolar neuron

• Unipolar neuron

• Interneuron

How do neurons communicate with each other?

• Through electrical impulses

• Through chemical signals

• Through both electrical and chemical signals

• Through mechanical vibrations