Exercise 17: Histology Of Nervous Tissue Flashcards Preview

Mammalian Physiology Lab > Exercise 17: Histology Of Nervous Tissue > Flashcards

Flashcards in Exercise 17: Histology Of Nervous Tissue Deck (35)
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1
Q

Supporting cells of the CNS

A

Glial cells

2
Q

6 types of glial cells

A

CNS: Oligodendrocytes, Astrocytes, microglia, ependymal cells

PNS: Schwann cells, satellite cells

4
Q

Basic functional units of nervous tissue

A

Neurons

5
Q

All neurons have a ____________ from which slender processes or fibers extend.

A

Cell body

6
Q

Clusters of cell bodies in CNS

A

Nuclei

7
Q

Collections of cell bodies in PNS

A

Ganglia

8
Q

Neuron processes in CNS

A

Tracts

9
Q

Neuron processes in PNS

A

Nerves

10
Q

The cytoskeletal elements of the neuron

A

Neurofibrils

11
Q

An elaborate type of rough ER; involved in metabolic activities of the cell

A

Nissl bodies

12
Q

Receptive region of neuron

A

Dendrite

13
Q

Generate and conduct nerve impulses

A

Axons

14
Q

Branches of axon

A

Collaterals

15
Q

Slightly enlarged cell body structure

A

Axon hillock

16
Q

The axon ends in many small structures called _________________, which form synapses with neurons or effector cells.

A

Axon terminals

17
Q

Each axon terminal is separated from the cell body of dendrites of the postsynaptic neuron by a tiny gap called the _____________________.

A

Synaptic cleft

18
Q

Long nerve fibers covered with a fatty material (myelin)

A

Myelinated fibers

19
Q

Schwann cells

A

Myelinate axons in the PNS

20
Q

Peripheral part of the Schwann cell and its exposed plasma membrane

A

Neurilemma

21
Q

Myelinating cells of CNS

A

Oligodendrocytes

22
Q

Gaps in myelin sheath

A

Nodes of Ranvier

23
Q

One very short process (which divides into peripheral and central processes) extends from the cell body

A

Unipolar neuron

24
Q

Nearly all neurons that conduct impulses toward the CNS are _______________.

A

Unipolar

25
Q

2 processes attached to the cell body…..rare neuron type found in the retina and ear

A

Bipolar neuron

26
Q

Many dendrites and one axon extend from the cell body; mostly CNS neurons and neurons with axons that carry impulses away from CNS

A

Multipolar neuron

27
Q

Neurons carrying impulses from sensory receptors in the viscera, skin, skeletal muscles, joints, or special sensory organs

A

Sensory (afferent) neuron

28
Q

Sensory neurons are typically what type of neuron?

A

Unipolar

29
Q

Neurons carrying activating impulses from the CNS to the viscera, body muscles and glands

A

Motor (efferent) neuron

30
Q

Motor neurons are mostly what type of neuron?

A

Multipolar

31
Q

Neurons situated between and contribute to pathways that connect sensory and motor neurons

A

Association neuron (interneuron)

32
Q

Interneurons are typically what type of neuron?

A

Multipolar

33
Q

A bundle of neuron fibers or processes wrapped in connective tissue coverings that extends to and/or from the CNS and visceral organs or structures of the body periphery

A

Nerve

34
Q

Nerves carrying both sensory and motor fibers are called __________.

A

Mixed nerves

35
Q

All _____________ nerves are mixed nerves.

A

Spinal

36
Q

Nerves that carry only sensory processes and conduct impulses only toward the CNS

A

Sensory nerves