HNS - Peripheral Nervous System

Question 1

PNS consists of _____ primarily.

Answer 1

12 pairs of cranial nerves

31 pairs of spinal nerves

Question 2

What do the motor nerves do?

Answer 2

Conduct impulses from the CNS to the effectors.

Question 3

What do sensory nerves do?

Answer 3

Conducting impulses from the receptors to the CNS.

Question 4

The motor nerves, connect to which two systems?

Answer 4

The autonomic nervous system and the somatic nervous system.

Question 5

What does autonomic mean?

Answer 5

Refers to involuntary muscles.

Question 6

What does the autonomic nervous system do?

Answer 6

Conducts impulses from the CNS to the involuntary muscles.

Question 7

What does the somatic nervous system do?

Answer 7

Conducts impulses from the CNS to the voluntary muscles.

Question 8

What does somatic refer to in this context?

Answer 8

Voluntary muscles.

Question 9

Connected to the autonomic nervous system are which two methods of division?

Answer 9

1. Sympathetic division

2. Parasympathetic division.

Question 10

What does sympathetic division refer to / do?

Answer 10

It preps the body for fight or flight.

Remember : sympathetic - SHAME I GOTTA GO

Question 11

What does parasympathetic division do?

Answer 11

Brings the body back to normal after sympathetic division aka back to the status quo.

Question 12

What is the main function of the CNS?

Answer 12

Receiving nerve impulses from the effectors, interpreting that info, and transmitting it to the effectors for the desired response.

Question 13

What is the brain enclosed by?

Answer 13

The skull, skin, and three cerebral membranes, namely Pia matter, Dura matter, and Arachnoid membrane.

Question 14

What is the pia membrane?

Answer 14

The innermost membrane, wrapped tightly around the brain.

It is rich in blood cells and provides oxygen + nutrients in the CNS.

Question 15

What is the Dura membrane?

Answer 15

The tough outermost layer, closest to the skull cavity and spinal canal.

Question 16

What does the arachnoid membrane refer to?

Answer 16

The thin middle layer between the dura and pia matter.

Question 17

What are the functions of cerebral fluid?

Answer 17

1- acts as a shock absorber
2- removes waste
3- supplies neurons with nutrients and oxygen 
4- prevents neuron dehydration 
5- maintains pressure around CNS

Question 18

Cerebral fluid exists where?

Answer 18

In the space between the dura matte and the arachnoid membrane.

Question 19

What are the functions of the peripheral nervous system?

Answer 19

• Conducting nerve impulses from the receptors to the CNS

- conducting nerve impulses from the CNS to the effectors

Question 20

What relationship do the parasympathetic and sympathetic divisions have?

Answer 20

An antagonistic one.