Chaoter 3- Nerve Cells Flashcards
(9 cards)
1
Q
Define neuron
A
A nerve cell
2
Q
Define interneuron
A
A nerve cell in the brain or spinal cord that carries messages between other nerve cells
3
Q
Label a typical neuron with a myelinated axon
A
- cell body
- dendrite
- nucleus
- myelin sheath
- Neurilemma
- Schwann cell
- node of ranvier
- Axon terminals
- axon covered with myelin sheath and neurilemma
4
Q
What are the three functional types of neurons and where are they in the body
A
- sensory neurons- brain and spinal cord
- motor neurons- muscles and glands
- interneurons neuron- central NS
5
Q
What are the three structural types of neurons and label a diagram of them
A
- multipolar neurons
- bipolar neurons
- unipolar neurons
6
Q
What is a nerve fibre
A
Any long extension of cytoplasm of a nerve cell body
7
Q
What is a nerve
A
A bundle of nerve fibres held together by connective tissue
8
Q
Define synapse
A
The junction between the branches of adjacent neurons
9
Q
What is a neuromuscular junction
A
The junction between branches of a motor nerve cell and a muscle fibres
