The Nervous System Part 1

What is the main function of the nervous system?

• To digest food

• To coordinate everything you do and help you respond and adapt to stimuli

• To pump blood

• To produce hormones

Tags

NGSS.HS-LS1-3

Specialized cells that are the basic units of structure and function in the nervous system are called _______.

• neurons

• hormones

• enzymes

• glia

Which part of the neuron receives impulses from neighboring cells?

• Axon

• Dendrite

• Myelin

• Terminal

What is the function of myelin in a neuron?

• To receive impulses

• To control the cell

• To coat the axon and allow impulses to be transmitted faster

• To send impulses to other cells

The chemical signal that crosses the synapse is called a _______.

• neurotransmitter

• hormone

• enzyme

• receptor

The messages transmitted between neurons in a nerve can travel in both directions.

• True

• False

The primary function of the nervous system is:

• to transport oxygen in the blood

• to break down food for energy

• to coordinate and control body activities

• to provide structural support to the body

2. Neurons are made up of three main parts. Which of the following correctly describes the function of each part?

• Dendrites receive signals, the cell body processes signals, and the axon transmits signals.

• Axons receive signals, dendrites transmit signals, and the cell body stores energy.

• The cell body transmits signals, dendrites store information, and axons receive signals.

• Dendrites transmit signals, axons process signals, and the cell body receives signals.

Myelin is ________, and its function in the neuron is ________.

• a fatty substance; to insulate axons and speed up nerve impulses

• a type of neurotransmitter; to transmit signals across synapses

• a protein; to provide energy to the neuron

• a type of cell body; to generate electrical impulses

The role of a neurotransmitter in the nervous system is to carry messages across the synapse from the axon of one neuron to the dendrite of another neuron.

• To store energy in the neuron

• To carry messages across the synapse from the axon of one neuron to the dendrite of another neuron

• To protect the neuron from damage

• To produce electrical impulses in the axon