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Spinal nerves
Action potential
Spinal Nerves 2
Misc.
Misc. 2
100
Number of nerves that arise from the spinal cord.
What is 31?
100
These are most commonly initiated by excitatory postsynaptic potentials from a presynaptic neuron.
What are action potentials?
100
The first pair of cervical nerves leave between these two bones.
What is the occipital bone and the 1st cervical vertebra?
100
formed from cervical nerves C3, C4, and C5 and contains both sensory and motor fibers that innervate the diaphragm.
What is the phrenic nerve?
100
Dorsal horns contain these kinds of fibers.
What are sensory?
200
Number of cervical nerve pairs?
What is 8?
200
In action potential these are released by the presynaptic neuron.
What are neurotransmitters?
200
The remaining cervical nerves leave above their corresponding vertebra except for this pair of cervical nerves.
What is the 8th, which leaves above the first thoracic vertebra?
200
An area of skin innervated by sensory fibers derived from a particular spinal nerve or segment of the spinal cord.
What is a dermatone?
200
These surround nerurons.
What are cell membranes?
300
Number of thoracic nerve pairs.
What is 12?
300
The neurotransmitters bind to receptors on the postsynaptic cell which opens these.
What are various types of ion channels?
300
The way in which the spinal nerves leave the vertebral canal.
What is the intervertebral formina?
300
These carry both sensory and motor fibers from the ventral and dorsal roots and are distributed to the deep nad superficial muscles of the back.
What are rami (ramus)?
300
The electric potential charge on the outside of the membrane is positive while the electrical charge on the inside of the membrane is negative.
What is a polarized neuron membrane?
400
Number of lumbar nerve pairs.
What is 5?
400
This opening has the further effect of changing the local permeability of the ___ _______________ and thus the membrane potential.
What is cell membrane?
400
These are formed from dorsaland ventral roots.
What are spinal nerves?
400
Comes from the Latin expression from twining. It is an interlacing network of nervous or anastamoses blood vessels or lymphatics.
What is a plexus?
400
The outside of the cell contains excess ___________, while the inside of the cell contains excess ___________. Additionally, negatively charged protein and nucleic molecules also inhibit the cell; threfore, the inside is negative as compared to the outside.
What is sodium;potassium?
500
Number of sacral nerve paris and the number of coccygeal nerve pairs.
What is 5 and 1?
500
Action potential begins here.
What is the axon hillock?
500
Ventral horns contain these fibers.
What are motor fibers?
500
Fromed by the ventral primary rami of the lower 4 cervical nerves and the first thoraccic nerve (C5- T1). Injury to the upper trunk of this anatomical feature may be caused by violent separation of the head from the shoulder which results in a "waiter's tip hand."
What is the brachial plexus?
500
When a neuron is inactive and polarized it is said to be this.
What is at it s resting potential?