Lecture Test 4 Flashcards Preview

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Flashcards in Lecture Test 4 Deck (103)
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1

Name the three major regions of the brain and state which ones are referred to as the "brain stem

Pons
Medulla
Midbrain

2

What are the ventricles of the brain and what is their function?

Openings in the brain. They make it lighter, serve as conduit for nutrients and waste, and as a shock absorber.

3

How many are there and in which portions of the brain are they located?

There are 4 ventricles:
-2 lateral (in the cerebrum)
-3rd in the diencephalon/thalamus
-4th in the pons/medulla

4

What is the cerebral aqueduct of Sylvius and where is it located?

Connects the 3rd & 4th ventricles. Located in the midbrain.

5

Where is cerebral spinal fluid (CSF) produced and what is its function?

Produced by epyndymal cells (special neuroglia). It's a shock absorber, regulates intracranial pressure, moves nutrients and wastes.

6

What is the effect of a damaged visual association area?

Can see, but cannot interpret

7

What is the function of the limbic system? The pons? The thalamus?

-emotion and behavior
-relay signals to the cerebellum
-relay signals to the cerebrum

8

What is the blood-brain barrier?

Does not permit things in the blood to cross over to the brain e.g. bacteria

9

What portion of the brain could most appropriately be called the center for homeostasis?

Hypothalamus

10

Where are the cardiovascular and respiratory centers located?

Medulla

11

What effect does Alzheimer's disease have on the mental capabilities of the victims of the disease and what specific part of the brain appears to be damaged?

-decreased memory
-The hippocampus

12

What type of waves would be seen a person who was really concentrating?

Beta - concentrating, awake, alert

13

What is the role of the reticular activating system (RAS)?

consciousness

14

Define perception

preception of the pain (cold, hot) with in the brain

15

Define sensation

sight, hearing, equilibrium, taste, small

16

List the general senses and the special senses. Which one of the special sense organs does NOT have hair cells?

All have hair cells Except the Eye( sight)

17

What is an EEG?

Electroencephalogram

18

What parts of the body are controlled by the somatic nervous system?

skeletal muscle

19

When does the autonomic nervous system operate?

ALWAYS Operates unconscious control that maintains homeostasis

20

In reference to the sympathetic nervous system, what regions of the spinal cord give rise to the preganglionic fibers?

SNS-Thoracolumbar (T1-L2).
PNS- Craniosacral

21

What are the major effects of this division SNS?

Flight or fight response: increase HR, dilate pupils, etc.

22

What neurotransmitter substances are utilized by this division SNS?

Postgaglionic in SNS uses epinephrine which is adrenergic.

23

Define adaptation

Reduction in sensitivity in presence of constant stimulus

24

What are the major effects of the division PNS?

Rest & Repose response

25

What neurotransmitter
substances are utilized by this division PNS ?

PNS uses acetylcholine (ACH) in preganglionic neurons.

26

What body structures receive NO parasympathetic innervation ?

- Skin (sweat glands, arrector pili)
- Adrenal medulla (adrenal gland)
All blood vessels and organs

27

What is the main integration center of the autonomic nervous system?

Hypothalamus

28

30. Be able to indicate what division of the autonomic nervous system (ANS) would be most active in certain activities. For example, running
away from a bear as opposed to reading a book for pleasure

Bear = sympathetic
Sex (Book) = parasympathetic

29

What bactericidal substance is found in lacrimal fluid?

lysozyme (tears)

30

What structures compose the three (fibrous, vascular, and sensory) tunics of the eye?

- Vascular: iris, ciliary body, choroid