mod 9

Question 1

Function of spinal cord And system its apart of

Answer 1

sensory and motor innervation of the body, 2 way conduction pathway for signals between body and brain, major center for reflexes. apart of CNS

Question 2

How many spinal nerves and how are they numbered

Answer 2

31 spinal nerves, c1-c7 emerge above respective vertebrae, c8 emerge below respective vertebrae

Question 3

filum terminale

Answer 3

long filament that extends from conus meduallaris

Question 4

conus medullaris

Answer 4

inferior end of actual spinal cord

Question 5

cauda equina

Answer 5

bundle of nerve roots at inferior end of vertebral canal is cauda equina

Question 6

layers that protect spinal cord

Answer 6

dura mater, arachnoid mater, and pia mater

Question 7

dorsal root

Answer 7

carries sensory neuron signals to spinal cord

Question 8

dorsal root ganglion

Answer 8

where cell bodies are held

Question 9

ventral root

Answer 9

signals going out to motor neurons travel through here

Question 10

what structures carry both sensory and motor information

Answer 10

ventral and dorsal rami

Question 11

define a reflex and give example

Answer 11

rapid, automatic, unlearned motor response ex: blinking

Question 12

dermatome

Answer 12

area of skin supplied by a singular spinal nerve

Question 13

what ventral rami contributes to cervical plexus

Answer 13

first 4 cervical nerves (c1-c4)

Question 14

what ventral rami contributes to bracial plexus

Answer 14

C5-c8 and most of t1

Question 15

what ventral rami contributes to lumbar plexus

Answer 15

l1-l4

Question 16

what ventral rami contributes to sacral plexus

Answer 16

l4-s4

Question 17

what ventral rami contributes to lumbosacral plexus

Answer 17

l4-s4

Question 18

major nerve associated with cervical plexus and what does it innervate

Answer 18

phrenic nerve innervates diaphragm

Question 19

5 major components of brachial plexus

Answer 19

ventral rami, trunks, divisions, and cords

Question 20

5 nerves associated w brachial plexus

Answer 20

musculocutaneous, median, ulnar, radial, axillary

Question 21

nerves associated w lumbosacral plexus

Answer 21

femoral, obturator, tibial, common fibular,

Question 22

functions of skin

Answer 22

protects from mechanical damage, prevents water loss, vitamin D production, sensory perception, temp regulation, excretion of salt/ waste

Question 23

layer of skin that has blood vessels and nerves

Answer 23

dermis

Question 24

cells found in the epidermis

Answer 24

melanocytes, Merkel cells, keratinocytes, melanocytes

Question 25

dermis and its layers

Answer 25

layer below epidermis, papillary layer and reticular layer

Question 26

hypodermis and what you find there

Answer 26

supports skin, you find areolar and adipose loose CT

Question 27

function of hair

Answer 27

protection, sensation, and insulation

Question 28

eccrine glands

Answer 28

secreted onto the skin surface

Question 29

apocrine glands

Answer 29

discharge into hair follicles

Question 30

ceruminous glands

Answer 30

lines external ear canal and produces earwax

Question 31

mammary glands

Answer 31

secretes milk

Question 32

sebaceous glands

Answer 32

multicellular exocrine glands open onto hair follicles and secrete sebum

Question 33

function of melanin and what does it protect against

Answer 33

produce melanin and protect against uv rays

Question 34

why do some people have more active melanocytes

Answer 34

exposure to uv rays and genetics

Question 35

autonomic nervous system

Answer 35

general visceral motor system of PNS. controls all the routine functions of physiological systems

Question 36

sympathetic nervous system

Answer 36

“fight or flight”

Question 37

parasympathetic nervous system

Answer 37

“rest and digest”

Question 38

differences between parasympathetic and sympathetic

Answer 38

sympathetic heart rate picks up, adrenaline rushes, pupils dialate
parasympathetic heart rate slows, respiration slows, pupils constrict