[Practice Test] Nervous System

The part of a neuron that carries nerve impulses toward the cell body is called a(n) __________.

• axon

• nerve

• synapse

• dendrite

• neurotransmitter

Which nervous system division is responsible for motor functions of skeletal muscle?

• Central Nervous System

• Somatic Nervous System

• Autonomic Nervous System

• Peripheral Nervous System

What is the main function of glial cells in the nervous system?

• Regulation of breathing

• Supporting neurons

• Insulation of axons

• Production of neurotransmitters

What is the resting potential of a neuron compared to its surroundings?

• More positive

• Equal

• More negative

• Neutral

Which ion plays a significant role in maintaining the resting potential of a neuron?

• Sodium (Na+)

• Anions (A-)

• Chloride (Cl-)

• Potassium (K+)

Which system is known as the 'rest and digest' system in the autonomic nervous system?

• Sympathetic system

• Parasympathetic system

• Somatic nervous system

• Central nervous system

What is the space between two neurons where neurotransmitters are released called?

• Synapse

• Cerebellum

• Dendrite

• Axon terminal

What is the main function of the action potential in neurons?

• Regulating breathing

• Maintaining homeostasis

• Producing neurotransmitters

• Communicating with other neurons

If someone tickles the bottom of your foot, your ankle automatically flexes. Arrange the following neurons in the correct sequence for information flow during this reflex: (X) interneuron, (Y) sensory neuron, (Z) motor neuron.

• X, Y, Z

• Y, X, Z

• Z, Y, X

• Y, Z, X

• X, Z, Y

Which ions are important in maintaining the membrane potential of the neurons?

• sodium and chloride

• potassium and calcium

• sodium and potassium

• magnesium and calcium