Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Biology > Homeostasis > Flashcards

Homeostasis Flashcards

You may prefer our related Brainscape-certified flashcards:
AP® Biology flashcards Biology 101 flashcards
1
Q

what is homeostasis

A

maintaining a constant internal environment

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

what and where is the hypothalamus

A

in the brain and it detects body temperature

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

what is the stimuli

A

a change in the environment

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

what is a receptor

A

cells that detect stimuli

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

describe homeostasis

A
  1. receptors detect changes in the body
  2. the control centre send out signals to coordinate a response
  3. effecter (can be a muscle or gland) bring about the response
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

How does the nervous system work

A

receptor, sensory neurone, CNS, motor neurone, effecter, response

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

The full reflex equation

A
  1. stimulus - change in the environment
  2. receptors on the skin will detect the stimulus
  3. an electrical impulse travels along the sensory neurone to the CNS
  4. after the sensory neurone there is a synapse where chemicals diffuse
  5. the electrical impulse continues to the relay neurone until it reaches another synapse and then continues along the motor neurone
  6. and finally reaches the effector (can be a muscle or gland)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

what are the ciliary muscles and the suspensory ligaments

A

they change the shape of the lens to focus light on the retina

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

in bright light what happens to the eye muscles

A
  • circular muscles contract
  • radial muscles relax
  • pupil constricts
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

in dim light what happens to the eye muscles

A
  • circular muscles relax
  • radial muscles contract
  • pupil dilates
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

what is the Cerebral cortex

A

memory, consciousness, language and intelligence

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what is the Cerebullum

A

coordination of all muscular activity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

what is the medulla

A

Unconsciousness Activity - heart beat and breathing

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

give me some example of homeostasis

A 
blood glucose concentration 
body temperature 
water content of the body 
blood pressure 
salt iron concentration
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

what is the S,R,M in storm

A

sensory, relay, motor neurone

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

how does the eye focus on an image

A

the cornea bends (or refracts) light

the lens produces further refraction

an image is bought into focus on the retina

optic nerve carries nerve impulses to the brain

17
Q

what is the cornea

A

the transparent region of the sclera at the front of the eye, it refracts light

18
Q

what is the iris

A

it has sets of muscles that control the size of the pupil and regulates the light reaching the retina

19
Q

what is the retina

A

made up of light sensitive cells called receptor cells (cone and rod cells)

20
Q

what is the sclera

A

tough outer white layer of the eye that protects and hold the eye in place

21
Q

what is the optic nerve

A

nerve that carries impulses from the retina to the brain

22
Q

what is myopia

A

short sightedness when people see objects close but cant distant objects

23
Q

when does myopia happen

A

the eyeball is to long
cornea is too curved
light focusses in front of the retina

24
Q

how can myopia be fixed

A

concave lens

25
Q

what is hyperopia

A

long sightedness when people see objects at long but struggle to see near

26
Q

why does hyperopia happen

A

light focusses behind the retina
eyeball is too short
cornea not curved enough

27
Q

how can hyperopia be fixed

A

convex lens

28
Q

vasodilation?

A

blood cells widen

blood vessels can rise closer to your skin so that heat energy can be released into the environment

29
Q

vasoconstriction?

A

when your cold

blood vessels get smaller so they are not close to your skin

to stop heat energy from being released

30
Q

why is it important to be able to control your internal environment

A

cells need the right conditions to function properly

right conditions for enzyme activity

31
Q

why does homeostasis need to maintain optimal conditions

A

cells depend on the bodies environment to live and function

32
Q

list three conditions that the body needs to maintain

A

water content

blood glucose

body temperature

33
Q

what is a sensory neurone

A

the sensory neurones carry information as electrical impulses from the receptors to the CNS

34
Q

what is a motor neurone

A

the neurones that carry electrical impulses from the CNS to effectors

35
Q

what is an MRI

A

a scan which uses strong magnetic fields and radio waves to produce detailed images of the inside of the body

36
Q

what is an EEG

A

recording of brain activity

37
Q

Far Objects

A

ciliary muscles relax so lens is flatter and thinner

suspensory ligaments tighten

allows light to focus on retina

38
Q

close objects

A

ciliary muscles contract so lens becomes fatter and wider

suspensory ligaments loosen

this allows light to focus on the retina

Biology (8 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions