The Nervous System (Pt. 1)

Question 1

The master controlling and communicating system of the body

Answer 1

Nervous system

Question 2

Every __ , __ , and __ reflects the activity of the nervous system (3)

Answer 2

• thought
• action
• emotion

Question 3

The signaling device, or means of communication with the body cells is?

Answer 3

Electrical impulses

Question 4

Electric impulses are __ , __ , and cause almost __ __ (3)

Answer 4

• rapid
• specific
• immediate responses

Question 5

The brain and spinal cord are part of the?

Answer 5

Central nervous system

Question 6

The nervous system includes the? (2)

Answer 6

• brain
• spinal cord

Question 7

The brain and spinal cord occupy what body cavity?

Answer 7

Dorsal body cavity

Question 8

The brain and spinal cord act as the __ and __ centers of the nervous system (2)

Answer 8

• integrating
• commanding

Question 9

The central nervous system (brain and spinal cord) interprets what?

Answer 9

Sensory information

Question 10

The central nervous system issues instructions based on past __ __ and current __ __ (2)

Answer 10

• Past experiences
• Current conditions

Question 11

Supporting cells are lumped together as __ or simply glia

Answer 11

Neuroglia

Question 12

__ __ are lumped together as neuroglia, or simply glia

Answer 12

Supporting cells

Question 13

Neuroglia, or glia means?

Answer 13

nerve glue

Question 14

Supporting cells will support, insulate, and protect delicate __

Answer 14

neurons

Question 15

__ __ will support, insulate, and protect delicate neurons

Answer 15

Supporting cells

Question 16

Although neuroglia resembles neurons structually, they are not able to transmit __ __

Answer 16

Nerve impulses

Question 17

Nerve impulses are a function that is highly __ in neurons

Answer 17

developed

Question 18

Rough ER are __ substances?

Answer 18

Nissel substances

Question 19

Found inside the cell body

Answer 19

Neurofibrils

Question 20

What is the main function of neurofibrils? To maintain what?

Answer 20

Maintain cell shape

Question 21

The armlike processes or fibers of neurofibrils vary in length, from __ to __ - __ feet (3)

Answer 21

• microscopic
• 3-4 feet

Question 22

The longest ones in humans reach from the lumbar region of the spine to the big toes

Answer 22

Neurofibrils

Question 23

The longest neurofibrils reach from the __ region to the __ __ (3)

Answer 23

• lumbar region
• big toes

Question 24

The neuron that process and conveys incoming messages (electical signals) towards the body

Answer 24

Dendrites

Question 25

Dendrites process and convey __ messages __ the body (2)

Answer 25

- incoming - towards

Question 26

Electircal signals are:

Answer 26

incoming messages

Question 27

Neuron processes that generate nerve impulses and conduct them away from the cell body

Answer 27

Axons

Question 28

Axons are neuron processes that generate nerve impulses and conduct them __ from the cell body

Answer 28

away

Question 29

All axon branch at their terminal end, forming hundreds to thousands of __ __ (2)

Answer 29

Axon terminals

Question 30

Axon terminals contain hundreds of tiny __ , or membranous __ (2)

Answer 30

- tiny vesicles - membranous sacs

Question 31

The tiny vesticles/membranous sacs contain chemicals called?

Answer 31

Neurotransmitters

Question 32

Each axonal terminal is separated from the next neuron by a tiny gap called the?

Answer 32

Synaptic cleft

Question 33

Syn means?

Answer 33

Clasp or joint

Question 34

The functional junction of the synaptic cleft, is called the?

Answer 34

Synapse

Question 35

Myeliate axons outside the CNS, they are specialized supporting cells

Answer 35

Schwann cells

Question 36

Schwann cells __ themselves tightly around the __ (2)

Answer 36

- Wrap - Axon

Question 37

The tight coil wrapped membrane of the schwann cell is called the?

Answer 37

Myelin sheath