NS PPT1a

Question 1

Somatic nervous system

Answer 1

Actions under conscious or voluntary control

Question 2

Autonomic nervous system

Answer 2

Controls and coordinates automatic functions

Question 3

Example of autonomic nervous system

Answer 3

Slowing of heart rate in response to an increased blood pressure

Question 4

Neurons

Answer 4

Functional units of the nervous system

Question 5

Neuroglial Cells

Answer 5

“helper” cells
support & protect neurons

Question 6

Serve as sensory receptors

Answer 6

Dendrites

Question 7

Conduct nerve impulse to cell body

Answer 7

Dendrites

Question 8

Receive nerve impulse from other neurons

Answer 8

Dendrites

Question 9

Short, numerous, multibranched

Answer 9

Dendrites

Question 10

Single, long process

Answer 10

Axons

Question 11

Conduct nerve impulse away from cell body

Answer 11

Axons

Question 12

Do myelinated or unmyelinated axons conduct impulses faster?

Answer 12

Myelinated

Question 13

Oligodendrocytes are located in the

Answer 13

brain & spinal cord

Question 14

Schwann cells are located in the

Answer 14

nerves outside brain and spinal cord

Question 15

How are neurons similar to other cells in the body?

Answer 15

Surrounded by a cell membrane
Contain cytoplasm, mitochondria, & other organelles
Carry out basic cellular processes (protein synthesis & energy production)

Question 16

How does an electrical signal in a neuron occur?

Answer 16

Ions move across the neuronal membrane

Question 17

What does the protein membrane of a neuron act as?

Answer 17

A barrier to ions

Question 18

What makes neurons special (able to conduct)?

Answer 18

High intracellular K and low Na

Question 19

Polarized at rest

Answer 19

inside is negative with respect to outside of cell