Nervous System CH 9 (sec 1-10) Test

What are the main types of cells that make up the nervous system?

• axons & dendrites

• neurons and neuroglial cells

• central and peripheral cells

• somatic and autonomic cells

Signals enter a neuron through small extensions. A neuron usually has many of these small extensions, known as _______.

• dendrites

• axons

• myelin

• ganglia

Neurons have long projections to transmit impulses. What is the name of these projections?

• dendrites

• axons

• myelin

• ganglia

The __________ sheath is an electrical insulator, made of layers of lipids that covers the axon.

• lipid

• microglia

• myelin

• ganglia

Sodium and potassium ions reverse membrane orientation during an action potential. How do they return to their resting potential positions?

• They are pumped across the membrane.

• They diffuse across the membrane.

Tags

NGSS.HS-LS1-3

What protein maintains the resting potential of a neuron?

• the sodium-potassium pump

• the magnesium-potassium pump

• the sodium-phosphorus pump

• the magnesium-phosphorus pump

The human nervous system can be most generally broken down into the following two major parts:

• the autonomic and somatic nervous systems

• the central and peripheral nervous systems

• the sympathetic and parasympathetic nervous systems

• the brain and spinal cord

Transmit information from the CNS to muscles, organs, and glands. Also called efferent nerves.

• Sensory nerves

• Motor nerves

• Mixed nerves

Transmit information from receptors in the body to the CNS. Also called afferent nerves.

• Sensory nerves

• Motor nerves

• Mixed nerves

Primarily senses the internal environment and controls involuntary activities.

• somatic nervous system

• autonomic nervous system