VN 17 Study Guide Test 6-DONE

Question 1

1. WHAT DOES THE NERVOUS SYSTEM DO? (Pg.233)

Answer 1

It directs the functions of the body’s organs and systems.

Question 2

2. WHAT DOES THE CENTRAL NERVOUS SYSTEM CONSIST OF? (Pg.233)

Answer 2

BRAIN & SPINAL CORD

Question 3

4. WHAT ARE SCHWANN CELLS?(pg.235)

Answer 3

form myelin sheaths around nerve fibers in the PNS.

Question 4

5. WHAT IS AN EFFERENT NEURON?

Answer 4

Brings about the reaction to the original stimulus. Usually muscular (like pulling away from a source of heat or pain) but can also be glandular (like salivating after smelling freshly baked cookies.)

Question 5

7. WHAT ARE SYNAPSES? (Pg.241)

Answer 5

Areas where the terminal branches of an axon (the axon terminals) are anchored close to, but not touching, the ends of the dendrites of another neuron.

Ensure that the nerve impulse travels in only one direction.

Question 6

8. WHAT ARE NEUROTRANSMITTERS?(pg.241)

Answer 6

transmission across synapses is brought about by the secretions of very low concentrations of chemicals.

(your bodys chemical messengers)

Question 7

10.THE SPINAL CORD IS A CONTINUATION OF WHAT?(Pg.242)

Answer 7

Of the medulla oblongata of the brainstem

Question 8

11.HOW MANY PAIRS OF CERVICAL NERVES ARE THERE? (Pg.243)

Answer 8

8

Question 9

12.WHAT IS A NEURON?(pg.106)

Answer 9

basic unit of organization of nervous tissue. (nerve cell)

Question 10

13.WHAT IS THE NAME OF THE FLUID THAT SERVES AS A SHOCK ABSORBER FOR THE CNS? (Pg.253)

Answer 10

Cerebral spinal fluid

Question 11

15.WHAT IS THE PINEAL GLAND?(pg.294)

Answer 11

is a small pinecone-shaped structure found between the two cerebral hemispheres attached to the upper part of the thalamus near the top of the third ventricle.
Produces the hormone melatonin

Question 12

17.WHAT DOES THE OCCIPITAL LOBE DO? (Pg.257)

Answer 12

Receives & interprets visual input

Question 13

18.WHAT DOES THE SYMPATHETIC DIVISION DO?(pg.234&258)

Answer 13

prepares the body for stressful situations that require energy expenditure such as increasing heartbeat & breathing rates to flee from a threathning situation

Question 14

19.WHAT DOES THE PARASYMPATHETIC DIVISION DO?(pg.234&58)

Answer 14

operates under normal nonstressful conditions. Restores the body to a restful state after a stressful experience.

stimulates bodys vegetative actvities such as digestion, urination, defecation

Question 15

20.DESCRIBE THE FOLLOWING PARTS OF THE EYE:

A. SCLERA (pg.263)

Answer 15

The outermost layer of the eye. It is white and composed of tough connective tissue.

Question 16

20B. IRIS (pg.263)

Answer 16

colored part of the eye consisting of smooth muscle that surrounds the pupil.

Question 17

20C. VITREOUS HUMOR (pg.264)

Answer 17

Fills the posterior compartment of the eye. Maintains ocular pressure, refracts or bends light and holds the retina and lens in place.

Question 18

20 D. RETINA (pg.263)

Answer 18

Innermost layer of the eye, its gray in color and contains the light sensitive cells known as rods and cones.

Question 19

20 E. CONES (pg.264)

Answer 19

Cones produce color and they require lots of light.

Question 20

21.DESCRIBE THE FOLLOWING PARTS OF THE EAR:

A. TYMPANIC MEMBRANE (pg.265)

Answer 20

is silvery gray in color, is very delicate and sound waves cause it to vibrate

Question 21

21 B. SEMICIRCULAR CANALS (pg.266)

Answer 21

involved in balance