Nervous System

Question 1

CNS

Answer 1

Brain analyzes, interprets and stores info

Question 2

Types of receptors

Answer 2

chemoreceptors
thermoreceptors
baroreceptors
proprioceptors

Question 3

chemoreceptors

Answer 3

detects changes in chemicals such as CO2 or calcium

Question 4

thermoreceptors

Answer 4

send changes in temperature

Question 5

baroreceptors

Answer 5

walls of arteries to detect changes in BP

Question 6

proprioceptors

Answer 6

in muscles to detect changes in body position

Question 7

2 systems of the PNS

Answer 7

Somatic and autonomic

Question 8

somatic system

Answer 8

regulates voluntary movement after feedback from senses

Question 9

autonomic system

Answer 9

involuntary regulation of internal systems

Question 10

2 parts of autonomic system

Answer 10

sympathetic and parasympathetic

Question 11

sympathetic nervous system

Answer 11

accelerates systems- fight or flight

Question 12

parasympathetic

Answer 12

pumps the breaks

Question 13

2 types of neurons

Answer 13

affrent and effrent

Question 14

affrent neurons

Answer 14

carry messages to CNS

long dendrite, short axon

Question 15

effrent neurons

Answer 15

motor commands from CNS to target

Question 16

dendrites

Answer 16

receive messages then send to cell body

Question 17

axon

Answer 17

extends from cell body

carry info from cell body ot axon terminal

Question 18

nucleus

Answer 18

DNA of cell

Question 19

node of ranvier

Answer 19

allows nutrients and waste to enter/leave cell

Question 20

synapses

Answer 20

gaps between neurons and muscle cells that neurotransmitters neither excite or inhibit

Question 21

2 neurotransmitters that activate synapse

Answer 21

acetylcholine (muscle contraction)

norepinephrine (adrenaline)

Question 22

neuron membrane

Answer 22

negatively charged inside (action potential)
impulse causes sodium ions to penetrate enuron
action potential becomes positively charged and is allowed to move
potassium ions restore balance

Question 23

motor unit

Answer 23

smallest unit of contraction, recruited in an all or none principal

Question 24

fewer fibers in motor unit =

Answer 24

more precise movement

Question 25

force is determined by

Answer 25

number of fibers in a motor unit. smaller units are recruited first

Question 26

stretch reflex

Answer 26

prevents overstretching through golgi tendon organ reflex

Question 27

golgi tendon orgon reflex

Answer 27

golgi organs detect degree of force exerted against tendon by a contracting muscle, if the force is too much, golgi organs fire off inhibitory signals to CNS

Question 28

reciprocal inhibition stretching

Answer 28

stretch is more effective if muscle is already relaxed, done with a partner

Question 29

plyometrics

Answer 29

concentric muscle contraction is stronger if immediately follows eccentric contraction of same muscle rapid deceleration of body followed by rapid acceleration in opposite direction

Question 30

3 phases of plyometrics

Answer 30

pre-stretch, amortization, muscle contraction