PT 103 - CNS - Unit 1 Flashcards Preview

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Flashcards in PT 103 - CNS - Unit 1 Deck (20):
1

Q: Describe the RESPONSIBILITY of the MYELIN SHEATH

A: Wraps around the axon to help with impulse (like insulation).

2

Q: WHAT nervous system works best while we are at REST?

A: Parasympathetic System

3

Q: When an adrenergic response action happens, WHAT compounds are responsible for ACTIVATION?:

A: Adrenaline like compounds

4

Q: WHAT is the central nervous system composed of?

A: 1. Brain
A: 2. Spinal cord

5

Q: WHAT is a NEURON?

A: The smallest unit of the nervous system; nerves through out body carrying messages back & forth from the CNS.

6

Q: HOW MANY nerve cells does the adult brain contain?

A: 100 billion

7

Q: The MEDULLA OBLONGATA controls 3 VITAL CENTERS- WHAT are they?

A: 1. Respiratory
A: 2. Cardiac
A: 3. Vasomotor

8

Q: Automatic functions are controlled by WHAT nervous system?

A: Autonomic Nervous System

9

Q: WHAT response is activated by the sympathetic system?

A: The "Fight or Flight" Response

10

Q: The HYPOTHALAMUS has a built-in thermostat and ________________ center.

A: Appetite Replay Center

11

11: WHAT is the simulated "Fight or Flight" Response?

A: Stimulated response by the body during stress or crisis.

12

Q: WHAT is a SYNAPSE?

A: A small gap between the end of one neuron and dendrites.

13

Q: WHAT are the main neurotransmitters of the sympathetic nervous system?

A: 1. Norepinephrine
B. 2. Epinephrine

14

Q: The cerebrum, medulla oblongata and cerebellum are ALL parts of the ___________.

A: Brain

15

Q: WHAT are AFFERENT NEURONS?

A: Sensory neurons that give electrical impulses from the body TOWARDS the CNS.

16

Q: WHAT is the main neurotransmitter of the parasympathetic system?

A: Acetylcholine (ACh)

17

Q: WHAT are SYMPATHOMIMETICS?

A: Drugs that mimic the sympathetic system

18

Q: WHAT protects the SPINAL CORD NERVES?

A: Vertabrae

19

Q: WHAT are the parts of the BRAIN STEM?

A: Midbrain, Pons, Medulla oblongata

19

Q: WHAT protects the BRAIN and SPINAL CORD?

A: Blood Brain Barrier