I have no humor

studied byStudied by 11 people
5.0(3)
get a hint
hint

Sense Organs

1 / 68

Tags and Description

Biology

8th

aqueous humor on deez biologically nonexistent nuts

69 Terms

1

Sense Organs

body structures that gather info from surroundings

New cards
2

Stimuli

change/signal in environment organism can react to

New cards
3

Nervous System

receives info of what’s happening in and outside the body; directs how body reacts to this; maintains homeostasis

New cards
4

Divisions of Nervous System

Central NS

  • Brain

  • Spinal Cord

Peripheral NS

  • Somatic NS

  • Automatic NS

  • Sympathetic NS

  • Parasympathetic NS

New cards
5

Peripheral Nervous System

gathers info and carries out activity; like workers in a corporate company;

New cards
6

Somatic Nervous System

controls voluntary actions

New cards
7

Automatic Nervous System

control involuntary actions

New cards
8

Sympathetic Nervous System

at work when body is at rest/relaxed (homeostasis)

New cards
9

Parasympathetic Nervous System

active when in flight/fight/freeze reaction

New cards
10

Central Nervous System

directs body activities and interprets stimuli; the a-hole boss you gotta listen to.

New cards
11

Spinal Cord

thick bundle of nerves through vertebrae; connects brain to PNS

New cards
12

Brain

86 billion interneurons and neurons, central control of Nervous System.

New cards
13

Brain Stem

Control involuntary functions, connects the brain to the spinal cord

New cards
14

Cerebrum

“Thinking”, problem-solving, learning, voluntary actions,

4 lobes split into left and right hemisphere connected by the corpus callosum

New cards
15

Cerebelium

coordinates muscle movement/balance

New cards
16

Frontal lobe

thinking, reasoning, behaviors, judgement

New cards
17

Parietal lobe

perception of stimuli

New cards
18

Temporal lobe

language, learning

New cards
19

Occipital lobe

vision and spacial reasoning

New cards
20

Limbic system

set of brain structures located at the top of the brain stem involved in emotions, motivation, and memory, especially those related to survival

New cards
21

Amygdala

almond shaped structure; responsible for automatic responses associated with fear and hormones; determines memory storage

New cards
22

Hippocampus

directs long-term memories to appropriate storage areas and retrieves memories

New cards
23

Hypothalamus

connects brain to endocrine system; what releases hormones

New cards
24

Thalamus

controls sleep/ consciousness by relaying sensory receptors between the brain stem and cerebral

New cards
25

Nerve Impulse

message neurons can carry

New cards
26

Neurons

Cells that carry info through the nervous system

New cards
27

Types of Neurons

Sensory Neurons

Interneurons

Motor Neurons

New cards
28

Sensory Neurons

pick up stimuli; converts in to nerve impulse; impulse travels with other sensory neurons til it reaches interneurons; usually in brain or spinal cord

New cards
29

Interneurons

carry nerve impulse to another interneuron or motor neuron

New cards
30

Motor Neurons

send impulse to a muscle or gland enabling it to respond

New cards
31

Neuron Vocabulary

Dendrite

Axon tips

Axon

Synapse

Salutatory conduction

Myelin sheath

New cards
32

Dendrites

thread-like extensions of a neuron that picks up nerve impulses

New cards
33

Axon

Long structure leading away from cell body; cells only have one axon

New cards
34

Synapse

liquid in between neurons where neurons transfer impulses; impulses are changed from electrical to chemical to cross gap of synapse.

New cards
35

Saltatory conduction

Process of which an impulse skips down the axon.

New cards
36

Axon tips

branch-like structure at end of an axon that transfers nerve impulses to other neurons.

New cards
37

Myelin sheath

a layer around axons that allow nerve impulses to travel faster; myelination, the process where a neuron due to a change or maturing develops a myelin sheath. Pruning; the removal of the myelin sheath.

New cards
38

Neurotransmitters

Serotonin

Apetite

Melatonin

Dopamine

Epinephrine (Adrenaline)

Cortisol

New cards
39

Serotonin

sleep, mood,

New cards
40

Apetite

mood, etc

New cards
41

Melatonin

sleep/tiredness

New cards
42

dopamine

happiness/reward

New cards
43

epinephrine(adrenaline)

excitement/fear/flight/fight/freeze

New cards
44

cortisol

stress hormones

New cards
45

How nerve impulse travels

Sensory neurons gather stimuli/ info and create electrical signal that moves from dendrites to axon →

Electrical signal move down axon by saltatory conduction →

Axon tips convert signals to chemical neurotransmitters so signals can cross synapse (goo) to interneurons →

Interneurons interpret info/signals →

message/reactions get sent back to motor neurons to carry out reactions

New cards
46

Eye

Respond to stimuli of light; convert to impulse the brain can interprets.

New cards
47

Eye Vocab

Cornea

Pupil

Iris

Lens

Aqueous Humor

Retina

Rods

Cones

Optic Nerve

New cards
48

Optic Nerve

carry light sensory info from retina to the cerebrum

New cards
49

Cornea

where light strikes first; clear tissue covers front of the eye

New cards
50

Aqueous Humor

clear jelly-like fluid between cornea and lens

New cards
51

Pupil

opening which light enters through

New cards
52

Iris

Circular structure; muscles in iris adjust how much light enters pupil; gives color to eye

New cards
53

Lens

Flexible structure that focuses light; flips image upside down

New cards
54

Retina

lines the back of eye; contains light sensitive cells

New cards
55

Rods

work best in dim light; detects black, white, shades of gray

New cards
56

Cones

work best in bright light; detects colors

New cards
57

Farsightedness

blurry nearby; clear far; short eyeballs; fixed by convex lens

New cards
58

Nearsightedness

blurry far; clear nearby; long eyeballs; fixed by concave lens

New cards
59

Ear

Sense organ that responds to the stimuli of sound; converts sound to impulses the brain can interpret

New cards
60

Ear Vocab

Outer

  • Ear Canal

Middle

  • Eardrum

  • Hammer/Anvil/Stirrup

Inner

  • Cochlea

  • Semicircular canal

  • Auditory nerve

New cards
61

Ear Canal

Funnel shaped; gather sound waves; waves travel down ear canal

New cards
62

Eardrum

membrane that vibrates when sound waves hit it

New cards
63

Hammer/Anvil/Stirrup

small bones pass vibrations to each other

New cards
64

Cochlea

snail shaped tube lined w/ sound receptor cells; receive vibrations from stirrup that travels via liquid in the cochlea; Vibrations stimulate receptors which send nerve impulse through the auditory nerve

New cards
65

Semicircular Canal

above cochlea; help maintain balance; Semicircular canal and two sacs behind it are filled with fluid and lined with tiny cells with hair-like extensions. When the head moves, the fluid moves causing the extensions to bend stimulating the receptors and creating nerve impulses containing info about the body’s motion and position.

New cards
66

Auditory Nerve

carry auditory sensory info from cochlea to the cerebrum

New cards
67

Taste bud

sensory receptors on tongue; respond to chemicals dissolved by saliva; main taste sensations: sweet, sour, salty, bitter, unami

New cards
68

Touch receptors

  • First type responds to delicate/light touch; senses textures; located in upper part of dermis

  • Second type responds to heavy pressure; located deeper in the dermis

  • Other types respond to temperature and pain

New cards
69

Olfactory Bulb

two, one above each nasal cavity, picks up info about smell and sends it to brain.

New cards

Explore top notes

note Note
studied byStudied by 65 people
Updated ... ago
5.0 Stars(1)
note Note
studied byStudied by 15 people
Updated ... ago
5.0 Stars(1)
note Note
studied byStudied by 163 people
Updated ... ago
5.0 Stars(1)
note Note
studied byStudied by 11 people
Updated ... ago
5.0 Stars(1)
note Note
studied byStudied by 50 people
Updated ... ago
5.0 Stars(1)
note Note
studied byStudied by 18 people
Updated ... ago
5.0 Stars(1)
note Note
studied byStudied by 23 people
Updated ... ago
5.0 Stars(3)
note Note
studied byStudied by 5550 people
Updated ... ago
4.7 Stars(29)

Explore top flashcards

flashcards Flashcard50 terms
studied byStudied by 27 people
Updated ... ago
5.0 Stars(2)
flashcards Flashcard23 terms
studied byStudied by 7 people
Updated ... ago
5.0 Stars(1)
flashcards Flashcard57 terms
studied byStudied by 4 people
Updated ... ago
5.0 Stars(1)
flashcards Flashcard22 terms
studied byStudied by 5 people
Updated ... ago
5.0 Stars(1)
flashcards Flashcard96 terms
studied byStudied by 149 people
Updated ... ago
4.5 Stars(2)
flashcards Flashcard30 terms
studied byStudied by 7 people
Updated ... ago
5.0 Stars(1)
flashcards Flashcard28 terms
studied byStudied by 20 people
Updated ... ago
5.0 Stars(2)
flashcards Flashcard202 terms
studied byStudied by 290 people
Updated ... ago
5.0 Stars(1)