Neurons

What does the body's nervous system contain?

• Brain, spinal cord, and billions of nerves

• Heart, lungs, and muscles

• Skin, bones, and blood vessels

• Stomach, liver, and intestines.

Neurons have 3 tasks: receive information from other neurons, carry information down the neuron, and ________.

• pass on information to other neurons

• store information temporarily

• convert information to energy

• block information from other neurons

What are neurons responsible for forming in the nervous system?

• Muscles

• Nerves

• Bones

• Skin

Dendrites: branchy extensions that ______ messages from other cells.

• receive

• send

• block

• ignore

Soma (cell body): contains nucleus and chemical 'machinery' common to most ______.

• cells

• animals

• plants

• bacteria

Axon: passes messages away from cell body on towards the ______ terminals.

• axon

• dendrite

• synapse

• cell

Myelin Sheath: insulating material that encases some axons; acts to speed up ______.

• transmission

• digestion

• respiration

• circulation

Axon ends in a cluster of axon terminals (terminal buttons) which are small 'knobs' that store and secrete ______.

• neurotransmitters

• hormones

• enzymes

• proteins

Glial cells serve many functions. Which of the following is NOT a function of glial cells?

• A) Structure

• B) Insulation

• C) Communication

• D) Digestion

Fill in the blank: Glial cells provide various types of _______ for neurons.

• support

• nutrition

• protection

• insulation