Nervous System Review 9-1-9.10 - 2/27/18

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This neurotransmitter stimulates the muscles to contract: _________

Acetylcholine

When a threshold is achieved, an event called the _________ potential occurs.

Action

_________ are cells found between neurons and blood vessels.

Astrocytes

The smooth muscles and glands are controlled by the ___________ nervous system.

Autonomic

A nerve impulse is received by the dendrites then travels down the _________.

Axon

The nervous system consists of two parts, the brain and the spinal cord make up the _________ nervous system, and the nerves throughout the body make up the _________ nervous system.

Central, peripheral

There are twelve pairs of _________ nerves.

Cranial

Neurons consist of a cell body, axons, and _________, which receive information.

Dendrites

These cells form a membrane that covers specialized brain parts:

Ependymal

These types of neurotransmitters increase membrane permeability, thus increasing the chance that threshold will be achieved. _________

Excitatory

The _________ function of the nervous system refers to information being interpreted so that the brain can make decisions.

Integrative

Where is the axon?

It connects the axon terminals to the cell body

Where are schwann cells?

Letter E

Where is the nucleus?

Letter H

_________ cells help destroy bacterial cells and cellular debris

Microglia

White matter is composed of axons that are sheathed in _________.

Myelin

Neurons are composed of a network of fine threads called _________.

Neurofibrils

Acetylcholine, serotonin and endorphins are all forms of _________.

Neurotransmitters

These support cells are responsible for secreting the myelin sheaths:

Oligodendrocytes

Where is the receptor in a synapse?

On the neuron, the things that catch the neurotransmitters

Groups of neurons that perform a common function, such as the storing of procedural memory (tying your shoes) are called neuronal _________.

Pools

Gaps in the myelin sheath are called Nodes of _________.

Ranvier

The _________ arc refers to a simple nerve pathway that would be involved with involuntary actions (ex: knee jerk or withdrawl)

Reflex

These cells have the same function as oligodendrocytes (secreting the myelin sheaths), but are packed with the myelin: _________

Schwann (cells)

Where are the Nodes of Ranvier?

Separating the schwann cells

Two ions necessary to create an electric current in a nerve fiber are potassium and _________.

Sodium

The skeletal muscles are controlled by the _________ nervous system.

Somatic

There ar 31 pairs of _________ nerves.

Spinal

The junction between two communicating neurons is called the _________.

Synapse

Where are the axon terminals?

The arrow

Where is the vesicle in a synapse?

The circles with dots inside, near the mitochondria in the axon

Where are the neurotransmitters in a synapse?

The little black dots in between the axon and neuron

Where is neuron in a synapse?

The lower half of the synapse, holds the receptors

Where is the myelin sheath?

The outer layer

Where is the mitochondria in a synapse?

The oval shapes next to the vesicles in the axon

Where is the cell body?

The question mark

Where is the dendrite?

The question mark

Where is the transporter in a synapse?

The thing that says voltage gate channel on the bottom left side of the axon; it's just a transporter.

Where is the axon in a synapse?

The upper half of the synapse, holds the vesicles and mitochondria

Where is the synapse in a synapse? (i know, i know)

The white area filled with neurotransmitters between the axon and neuron

Neurons that have a single process extending from the cell body are classified as _________, if they have two processes, they are classified as _________.

Unipolar, bipolar


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