Presentation 3rd week

Question 1

nervous system

Answer 1

it is the body’s main control system, it recieves input from amount of resources to control physical movements, keep in balance, controllin mental stuff

Question 2

Nervous system is made up

Answer 2

nerve cells, neurons, they generate electric impulses, action potentials to communicate with each other with chemical substances (neurotransmitters) or electric impulses

Question 3

homoestasis

Answer 3

biological balance, maintain order works closely with endocrine system

Question 4

nervous system is working

Answer 4

automatically but sometimes conciounsness is needed

Question 5

central nervous system

Answer 5

brain and spinal cord

Question 6

Periphral nervous system

Answer 6

sensory (input) carries all senses to brain and motor (output) gets information from the brain carries to entire body

Question 7

somatic division in motor output

Answer 7

control of skeletal muscle

Question 8

autonomic division in motor output its automatic

Answer 8

control of smooth muscle cardiac muscle (heart) glands (hormons) and has two parts sympthatic or parasympthatic

Question 9

dendrites

Answer 9

responsible for communacation

Question 10

axons

Answer 10

carry electrical impulses to cell body to other neurons

Question 11

myelin sheat

Answer 11

sometimes communication needs to be faster not all neurons have myelin sheat, it heals itself. Energy speed heals

Question 12

Neuron types

Answer 12

sensory neuron, motor neuron, interneuron

Question 13

sensory neuron

Answer 13

they carry information, such as light to the central nervous system periphrel

Question 14

motor neurons

Answer 14

carry information from central nervous system to all organs and tissues muscles glands periphral

Question 15

interneurons

Answer 15

connecter or associasion neurons they carry information within the central nervous system between the components of central nervous system

Question 16

resting potential

Answer 16

inside of the cell negatively charged (polarized) the cell is resting the resting disturbed by impulse come from another neuron

Question 17

action potential

Answer 17

when resting phase is over, we call it action potential it starts to act. greater change is needed. once arrive treshold possitive potassium ions rushs into cell and cause depolarizing

Question 18

sodium ions

Answer 18

outside of the cell when resting potential

Question 19

potessium ions

Answer 19

inside of the cell when resting potential

Question 20

repolarization

Answer 20

its like calming. potassium ions gets out

Question 21

hyperpolarization

Answer 21

its occur once repolarize phase is over, cell is too much negative

Question 22

action potentials vary in terms of

Answer 22

speed or velocity, reflexes is more quick and glands hormones are slower myelin sheat is important here

Question 23

communication between neurons

Answer 23

synaptic claft, synapse electrical and chemical synapse

Question 24

in electric synapse

Answer 24

we dont need chemical conversation. the immidiate signal

Question 25

chemical synapse

Answer 25

first electrical message should be converted to chemical and back to electrical again. action potential causes release of some chemical substances (neurotransmitters). the slow signal and more controlable, more precise and more selective

Question 26

chemical synapse happens that way

Answer 26

action potential arrives on axon terminals on presynaptic neuron and calsium gates open, and neurotransmitter is released in presynaptic neuron, and they binds to receptors on target cell and cause an action potential (depolarize)

Question 27

excitory neurotransmitters

Answer 27

causes depolarize and making positive glutamate

Question 28

inhibitory neurotransmitters

Answer 28

causes hyperpolarize and making inside even more negative serotonin

Question 29

serotonin

Answer 29

mostly inhibitory, role in regulating mood, apetite, circaddian rythm and sleep, some antidepressants can help stabilize moods by stabilizing serotonin levels

Question 30

dopamine

Answer 30

influences emotion and attention makes you feel awesome if there is more dopamine than its needed psychosis less domapine adhd

Question 31

norepinephrine

Answer 31

triggers your fight or flight response, increases heart rate, primes muscles both excitory and inhibitory like dopamine depending on the receptor