Nervous system 12/4

What does the CNS include?

• The Central Nervous System (CNS) includes the brain and spinal cord.

• The Central Nervous System (CNS) includes the heart and lungs.

• The Central Nervous System (CNS) includes the liver and kidneys.

• The Central Nervous System (CNS) includes the stomach and intestines.

The PNS is divided into two parts: AUTONOMIC and ________.

• SOMATIC

• CENTRAL

• PERIPHERAL

• SYMPATHETIC

The autonomic system controls your eyes and kidneys.

• False

• True

Tags

NGSS.HS-LS1-3

Fill in the blank: Neurons "fire" with the ______ principle. When a neuron fires, it does so at full strength and if the neuron is not stimulated past the minimum, it does not fire at all.

• all-or-none

• partial-response

• graded-response

• variable-intensity

What are the branch-like structures at the top of a neuron called?

• Axons

• Dendrites

• Soma

• Nucleus

Fill in the blank: The soma or cell body is at the center of the dendrites and contains the _______.

• nucleus

• mitochondria

• ribosome

• cytoplasm

What is the function of the axon in a neuron?

• The axon transmits impulses away from the neuron's cell body to other neurons or muscles.

• The axon stores neurotransmitters for later use.

• The axon receives signals from other neurons and transmits them to the cell body.

• The axon provides structural support to the neuron.

What is the purpose of the myelin sheath?

• The myelin sheath is a fatty covering that some axons have to help insulate and speed along the electrical impulses that occur within the axon.

• The myelin sheath is a protein layer that protects the cell body from damage.

• The myelin sheath is a structure that helps in the production of neurotransmitters.

• The myelin sheath is a membrane that regulates the entry and exit of ions in the neuron.

Where is the nucleus located?

• Soma

• Axon

• Dendrites

• Myelin Sheath

In some neurological disorders, the myelin can become damaged, causing the neurons to fire more slowly, or less consistently. An example is _________.

• multiple sclerosis

• Alzheimer's disease

• Parkinson's disease

• Huntington's disease