midterm 1

Question 1

The nervous system is made up of

Answer 1

the brain, spinal cord, and nerves

Question 2

Central Nervous System (CNS)

Answer 2

Structural and functional center of the entire nervous system; Consist of the brain and spinal cord

Question 3

Peripheral Nervous System (PNS)

Answer 3

All the nerves and their branches

Question 4

Somatic Nervous system (SNS)

Answer 4

carry information to the somatic effectors (skeletal muscles)

Question 5

Autonomic Nervous System (ANS)

Answer 5

carry information to the autonomic or visceral effectors (smooth muscles, cardiac muscles and glands)

Question 6

Somatic Effectors

Answer 6

Skeletal muscles

Question 7

Efferent pathways of the ANS can be divided into the

Answer 7

Sympathetic division and the parasympathetic division

Question 8

Glia cells

Answer 8

Support the neurons

Question 9

Five major types of glia

Answer 9

1)Astrocytes 2)Microglia 3)Epedymal cells 4)Oligodendrocytes 5)Schwann cells

Question 10

Oligodendrocytes produce

Answer 10

produce the fatty myelin sheath around nerve fibers in the central nervous system

Question 11

Schwann cells support

Answer 11

support nerve fibers and sometimes forming a myelin sheath around them

Question 12

Multiple Sclerosis (MS)

Answer 12

myelin disorders; characterized by myelin loss and destruction accompanied by varying degrees of oligodendrocytes injury and death.

Question 13

All nuerons consists

Answer 13

consists of a cell body and at least two processes; one axon and one or more dendrites

Question 14

Nuerons -structural classification

Answer 14

1)Multipolar 2)Bipolar 3)Unipolar

Question 15

Multipolar Nuerons

Answer 15

have only one axon but several dendrites; most in the brain and spinal cord are multipolar

Question 16

Bipolar Nuerons

Answer 16

have only one axon and one highly branched dendrite

Question 17

Unipolar (pseudounipolar) neurons

Answer 17

have a single process extending from the cell body

Question 18

Nuerons - functional classification

Answer 18

1) afferent nuerons 2)efferent nuerons 3)internuerons

Question 19

Afferent Nuerons

Answer 19

Sensory nuerons; transmit nerve impulses to the spinal cord or brain

Question 20

Efferent Nuerons

Answer 20

Motor nuerons; transmit nerve impulses away from the brain or spinal cord to or toward muscles or glands

Question 21

Internuerons

Answer 21

conduct impulses from afferent nuerons to or toward motor nuerons

Question 22

Functional classification of nuerons in a reflex arc

Answer 22

Nuerons can be classified according to the direction in which they conduct impulses; Stimulus -Receptor- Afferent - CNS- internueron- efferent - effector -response