Neurons Flashcards
1
Q
Types of nerve tissues
A
- Neurons
- Neuroglia
2
Q
Neurons
A
- Working units of the nervous system that generate and transmit impulses
- A neuron is composed of a cell body from which protoplasma processes arise.
3
Q
types of processes
A
- Axon
- Dendrites
4
Q
Neuroglia
A
- Are the connective tissue cells of the central
nervous system
5
Q
Axon
A
- Are long processes and only one axon arises from each nerve cell
- A nerve fibre that conveys nervous impulses away from cell body.
6
Q
What surrounds the axon
A
Myelin sheath
7
Q
sensory neurons
A
- Collects information from the environment and transmitting it to the brain for interpretation.
7
Q
Dendrites
A
*Are short processes and one or more arise from each nerve cell.
* Convey impulses towards the cell body
8
Q
what forms the white matter and grey matter
A
- axon and dendrites are extensions of the cell body and they form the white matter.
- Cell bodies form the grey matter of the nervous system
9
Q
types of neurons
A
- Sensory neurons
- Relay or interneurons
- Motor neurons
10
Q
Motor neurons
A
- Take instructions from the Brain and the spinal cord and translate them into precise movement.
11
Q
relay neurons
A
- Neurons that ensure smooth communication between sensory and motor neurons.
12
Q
Classes of neurons
A
- Multipolar neurons
- Bipolar neurons
- Pseudounipolar neurons
- unipolar neurons
13
Q
Multipolar neurons.
A
- Have one axon and 2 or more dendrites (most motor neurons and connector neurons are of this type)
13
Q
Bipolar neurons
A
- Oval cells that have one dendrite and one axon
- Arise from opposite poles of the cell body
