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