Somatic and Autonomic Nervous System (PNS)

Question 1

What does the PNS coordinate?

Answer 1

involuntary functions like heart rate and respiration, as well as voluntary functions and sensory functions

Question 2

What is the Somatic Nervous system?

Answer 2

part of PNS, includes nerves involved in voluntary control of skeletal muscles

Question 3

What is the Autonomic Nervous system?

Answer 3

Body functions that are mainly involuntary and controlled by signals that pass from brain to glands and organs, includes sympathetic and parasympathetic system

Question 4

What is the function of the somatic system?

Answer 4

carries sensory signals from the environment and voluntary motor commands to skeletal muscles

Question 5

what is the function of the autonomic system?

Answer 5

Sense internal conditions and regulates the involuntary activity of visceral organs

Question 6

Where are Somatic sensory signals conveyed?

Answer 6

from the sensory receptors through spinal nerves into ascending tracts in the spinal cord, or through cranial nerves. they are processed in cerebral cortex.

Question 7

How are Somatic motor signals sent?

Answer 7

sent through descending tracts from the cerebral cortex, in the white matter of the spinal cord to spinal nerves, or through cranial nerves to skeletal muscles. control muscle contraction.

Question 8

what do skin sensory receptors do?

Answer 8

convey signals for tactile sensations

Question 9

what are the cells and corpuscles that detect touch sensations in the skin?

Answer 9

Merkel cells and Meissner corpuscles that detect touch, pressure and vibration. Pacinian Corpuscles that detect pressure and free nerve endings detect itch.

Question 10

What are the motor pathways for somatic signals?

Answer 10

motor signals descend in direct (pyramidal) and indirect (extrapyramidal) pathways

Question 11

Where do direct pathways extend from?

Answer 11

The motor area of the cerebral cortex

Question 12

where do indirect pathways originate?

Answer 12

Brain stem

Question 13

What are the pathways for somatic sensory signals

Answer 13

ascend through the spina cord to the sensory Cortex of the brain through the spinothalamic and posterior column pathway

Question 14

What do the basal ganglia and cerebellum do?

Answer 14

coordinate movement of skeletal muscles (somatic)

Question 15

What is the function of the Autonomic System?

Answer 15

controls involuntary visceral activities like heart rate, respirations, digestion, and glandular secretion and reproduction.

Question 16

what is the main center of control for autonomic functions?

Answer 16

hypothalamus and brain stem

Question 17

what nerves are the autonomic functions managed by?

Answer 17

nerves that activate daily processes or manage the need for increased activity

Question 18

What is the sympathetic nervous system?

Answer 18

The system that ramps up body functions of increased activity (fight or flight)

Question 19

What are the sympathetic nervous systems functions?

Answer 19

produces fight or flight response in stressful situations, pupils, blood vessels, airways dilate, heart rate increases, digestive activity on hold

Question 20

where do sympathetic nerves arise from?

Answer 20

thoracic and lumbar segments of spinal cord

Question 21

what is the parasympathetic nervous system?

Answer 21

activates resting processes like digestion and waste elimination

Question 22

where do parasympathetic nerves originate ?

Answer 22

In the brain stem and sacral spinal cord

Question 23

what is the function of the parasympathetic system?

Answer 23

active during times of rest, digestive and urinary activities take place, heart rate decreases as does airway diameter.

Question 24

Sympathetic motor neurons synapse at ganglia

Answer 24

False

Question 25

which cranial nerves have autonomic functions?

Answer 25

3, 7, 9, and 10