Chapter 6- The nervous sys-Part 1 Flashcards Preview

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Flashcards in Chapter 6- The nervous sys-Part 1 Deck (73)
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1

There're are 3 functions of the nervous system:
1-----------
2-----------
3-----------

1. Sensory (detection and input)

2. Integrative ( 1. processing/storing/analyzing of sensory info
2.decision making)

2. Motor (output)

2

how does the process for a muscle respond to a nerve impulses ?

1. Sensory Receptor ( responds to a stimulus by producing a
a receptor potential) that goes to
2. Sensory Neuron (axon conducts impulses from the receptor to the
integrating Centre)

3. Integrating Centre (relay impulses from sensory to motor neurons)

4. Motor Neurons ( Axon conducts impulses from integrating Centre
to effector)

5. Effector (muscle that responds to motor nerve impulses)

3

1. ------------2.-------------3.-------------
are involved in the relay of sensory stimuli, --------------, such as perception and motor activities.

1. Graded potential
2. Nerve action potential
3. Muscle action potential

- integrative function

4

What is interneuron ? and what they do ?

- It is called a relay neuron , create neural circuits, enabling
communication between sensory or motor neurons and the
CNS. Found between ( afferent and efferent neuron)

5

The Nervous tissue is designed for -------------

communication

6

The nervous tissue has 2 cells :
1) -----------
2)-----------

1) Neuroglia
2) Neurons

7

The 3 functions of the Neuroglia;
1.-----------
2.-----------
3.-----------

1. Support
2. Nourish
3. Protect

8

With Injury /disease, ------------- multiply to fill the spaces formerly occupied by neurons

Neuroglia

9

The Neuroglia has 4 types of cells:
1.-----------
2.----------
3.----------
4.----------

1. Astrocytes
2. Oligodendrocytes
3. Microglia
4. Ependymal

10

Provides ----------- to the neurons , help form the BBB(---------) ; it is called --------cytes. Located in the -------- and acts as a ------------ and it is made from ----------

- nutrition
- Blood Brain Barrier
- Astrocytes
- CNS
- Bodyguard
-Neuroglial cells

11

------------protects the brain from harmful substances, thick ------------- , tight junction. Also, prevents the passage of ------------ from the blood and the brain
and its surrounding fluid).

Blood-Brain Barrier
basement membrane
materials

12

------------form/maintain the myelin sheath of the CNS neurons.

- Oligodendrocytes- it hugs the MYELIN SHEATH
Olig = few, dendride = branches

13

------------Phagocytotic cells ( similar to tissue macrophages), they remove debris, phagocytize microbes.

Microglia

14

What is CFS ? and what does it do ?

- It is a cerebrospinal fluid, it is clear colorless fluid that
circulates around the brain and spinal cord. It protects the
brain and spinal cord from injury.

15

----------cells that encircle axons in the ----------.

Schawnn cells
PNS

16

---------form Myelin sheath of -------axons.

Schawnn cells, PNS

17

-------------are involved in the regeneration(after injury) of PNS axons.

Schwann cells

18

Schawnn cells (do not have branches), It is a ------------of the --------?

-Neuroglia of the PNS

19

The two main division of the nervous system are:
1) ---------------which consist of the ------- and --------
2)------------------which consist of all the --------- -------outside the ------.

1. CNS (central nervous system) , Brain , Spinal cord
2. Peripheral Nervous System (PNS) , nervous, tissue outside
the CNS

20

Neurons are --------cells , It has 3 types of cells
1.
2.
3.

- nerve
1. Dendrite
2. Cell Body ( aka soma, perikaryon)
3. Axon

21

-------input portion of the neuron, it has single or multiple extensions off the cell body.

Dendrite

22

-------contains lots of receptor sites for receiving chemical messages

Dendrite

23

---------contains the nucleus and other organelles, and a act as cell processes (e.g- synthesize protein)

Cell body (aka soma, perikaryon)

24

----------a thin cylindrical process off the cell body , it is the output portion of the neuron.

Axon

25

The ends of an axon divides into many fine processes called -------- ------------

axon terminals

26

----------------the swollen ends of some axon terminals

Synaptic end bulb

27

some axons are -------

myelinated

28

-------------a multilayered lipid and protein covering that speeds up the signal (action potential)

-Myelin

29

Axons coated in myelin are called ---------

myelinated axons

30

One of the causes of Multiple Sclerosis is malfunction of the --------- ---------where the immune system keeps attacking or eating up the ------- --------

Myelin Sheath