Ovido
Språk
  • Engelska
  • Spanska
  • Franska
  • Portugisiska
  • Tyska
  • Italienska
  • Nederländska
  • Svenska
Text
  • Stora bokstäver

Användare

  • Logga in
  • Skapa konto
  • Uppgradera till Premium
Ovido
  • Hem
  • Logga in
  • Skapa konto

biology 5

what is homeostasis?

the regulation of the internal conditions of a cell or organism to maintain optimum conditions for function in response to internal and external changes

name 3 things that are controlled by homeostasis

blood glucose concentration, body temperature and water levels

what do all control systems include?

receptors, effectors and coodination centres

name an example of a receptor

specialised cells

name examples of coordination centres

brain, spinal cord, pancreas

name examples of effectors

muscles, glands

what do receptors do?

detect stimuli

what do coordination centres do?

recieve and process information

what do effectors do?

bring responses to restore optimum levels

what is the order of the nervous system?

stimulus, receptor, sensory neurone, relay neurone, motor neurone, effector, response

what is the role of the nervous sytem?

to react to the surroundings and to coordinate our behaviour

what does cns stand for?

central nervous system

which two organs make up the cns?

brain and spinal cord

what is the function of the nerve cell?

to carry electrical impulses rapidly around the body

name some parts of the nerve cell (revise where these are)

cell body, dendrites, myelingheath, axon, synapse, nucleus

what is the function of dendrites?

it can make lots of connections to other nerve cells

name two functions of the axon

its very long to carry the nerve impulse a long way and its insulated so the impulses travel rapidly

why does the cell body have lots of mitochondria?

to transfer the energy needed to make transmitter chemicals

why are reflexes important?

reflexes happen rapidly and automatically you dont have to think about them. this helps you to avoid danger/harm. bodily functions like breathing and food digestion happen via reflexes

what is the first step of the reflex arc?

the receptor is stimulated

what is the second step of the reflex arc?

an electrical impulse travels along the sendory neurone to the cns

what is the third step of the reflex arc?

at the synapse a chemical is released, it diffuses across the synapse

what is the fourth step of the reflex arc?

an electrical impulse is triggered in the relay neurone

what is the fifth step of the reflex arc?

when the impulse reaches the next synapse, a chemical is released which travels across the synapse

what is the sixth step of the reflex arc?

an electrical impulse is triggered in the motor neurone

what is seventh step of the reflex arc?

the impulse reaches the effector which is stimulated to respond

what are all the parts of the reflex arc (revise where they are)

receptor, effector, sensory neurone, motor neurone, relay neurone, synapse, spinal cord

describe the endocrine system

the endocrine system produces a chemical responce to a stimulus. the glands of the endocrine system secrete hormones into the blood stream. the blood carries hormones to target organs which have receptors to pick up the hormone. hormonal effects are slower than the nervous system but last for longer

name the main endocrine glands

pituitary, thyroid, adrenal, pancreas, ovaries, testes

how does insulin control blood glucose levels?

glucose is taken in by cells, glucose is converted to glycogen in the liver and muscles, blood glucose falls, normal level of blood glucose, pancreas, insulin released

what causes type 1 diabetes?

the pancreas does not make enough insulin, so blood glucose isnt controlled and it gets very high after eating a meal

when does type 1 diabetes usually start?

in children and teenagers

how is type 1 diabetes treated?

with insulin injections

what causes type 2 diabetes?

the cells in the body no longer respond to the insulin that is produced by the pancreas

what are the risk factors for type 2 diabetes?

obesity and lack of exercise

how is type 2 diabetes treated?

a carbohydrate controlled diet and an exercise routine

what will happen to someone who has diabetes after they eat?

their blood glucose concentration rises high after they have a meal

what is the main reproductive hormone in the female?

oestrogen

what is ovulation?

when a mature egg is released from an ovary

what is the main reproductive hormone in the male?

testosterone

what does testosterone do?

stimulates sperm production

what does fsh stand for?

follicle stimulating hormone

what does lh stand for?

luteinising hormone

what do fsh do?

causes maturation of an egg in the ovary

what does lh do?

stimulates the release of an egg

what does oestrogen and progesterone do?

maintains the uterus lining

how does oral contraceptive work?

contains hormones that inhibit fsh production so that no eggs mature

how do barrier methods work?

prevents the sperm from reaching en egg

how does abstinence work?

avoids intercourse when an egg might be in the oviduct

how do surgical methods work?

sterilise the male or female by cutting or tying tubes to prevent the egg or sperm reaching their target area

how do intrauterine devices work?

prevent the implantation of the embryo or releases a hormone

how does progesterone work?

inhibits the maturation and release for a number of months or years

how do spermicidal agents work?

kill or disable sperm

what are nerve cells?

nerve cells are called neurones. they are adapted to carry electrical impulses from one place to another , a bundle of neurones is called a nerve

where is the pituitary gland?

at the base of the brain below your hypothalamus

where is the thyroid gland?

in the front of the neck and above the collarbones

where is the adrenal gland?

on top of each kidney

where is the pancreas?

high up in your abdomen

what hormones does the pituitary gland release?

fsh and lh

what hormone does the thyroid gland release?

thyroxine

what is the synapse?

the junction between neurones. chemicals called neurotransmitters diffuse across the synapse

what is the dendron?

tiny branches that recieve impulses from other neurones

Quiz
Kristendomen
biology 1
De l'après-guerre à la revolution tranquille (1945-1960)
Bio klausurk
biology 3
An Inspector Calls
Cell Biology - Osmosis
unit 6
arthrose✅
marketinf
Cell Biology - Diffusion
Woyzeck
Greetings
Stilmittel
Unit11Lernen für die Unit11 wiederholung
💗
💗
💗
La Marcha
les mots connecteurs
MBCS
ASSOLUTISMO E LIBERALISMO
Physik 4a 1Lzl
Cell Biology - Stem Cells
Cell Biology - Mitosis and the Cell Cycle
Cell Biology - Cell Specialisation
Polish Final
risposta multipla
Cell Biology - Eukaryotes and Prokaryotes
4btuamadre
Cell Biology - Animal and Plant Cells
vero o falso
Born a crime 5
4ache palle
Arbetsliv, jämnställdhet på arbetsmarknaden
Sf ai associate last set
Haut
anglais
Nat 5 english
Themenfeld 6
Biology Ecology Unit (Pre-IB Science 10)
Inglesverbos
IPA-Quiz
Ai associate
so np Judendom
geografiaexame de geografia A
UNIT 3
Spanish GC
kunst
cour 1
quiz sobre eliza
futur simple
Auge
Stilmittel und Rhetorische Figuren in der deutschen Literatur
resesrhc ,ethocs
새 단어 14과 3급
새 단어 13과 3급
avstod
inspector calls
IVASPE
ire
POU100
Irene Tomei
german
Français: Théâtre
the eye
diversificazione
VBM
.
cell stucture
samhällsekonomi
kf
fysikprov 25/4/2025
Hjärtat & Blodet v 18
Matteläxa 29/4
hola
phrasal verbs si
Internationell ekonomi 2
unam biologia
Вітька + Галя частина 1
Osmosis
engelska glosor v.17
Unter der DrachenwandDer Roman "Unter der Drachenwand" von Arno Geiger aus 2018, ist ein Kriegsroman des zweiten Weltkriegs.
language paper 2
politik
synthese
philo exam 3
apr 23
Karel Čapek
BUSINESS TAX
Tabela de sais e acidos
parole criminale ita-se
Parole criminale se-ita
Les Contraires Fréquents
Hulpmiddelen bij bedverpleging
ziekenkamer
verpleegkunde terminologie
test 4
samhällkunskap begrepp
paisos i capitals europa
Vocabulary
PATHFIT 4
ENTREP MIND
17
Geburtsdaten und -orte
Stand
Ingles- ABC fluent vocabulary
tell me questions
vocabulario
beenderenstelsel
richtingsaanduidingen (organen orienteren tegen over elkaar)
aanzichten (huid en spieren)
medische terminologie
Bekkengordel (pelvis)
czasowniki
kapitel 9
Paradigmi
sciencerevision for science test
BAB 5 - copy
SES C6
vocabulario ingles
Chemistry Test 3
IQs
Verbi irregolari
BAB 5
spanisch 4hulllulu
Biologie - Cytologie 3aucune
spanska mutligt
music listening testmusic listening test
ebaregulaarsed sõnad õp lk76(-er)
sõnad õp lk 76(-er)
Spanish study guide
Biologie - Cytologie 2aucune
wervelkolom
sarah
schedel
ans 4
Engelska glosor inför uppsats (50 st)
Código Penal
Unit 1 KA3 - Gene Expression
Forensic Medicine (Countries)
Mexico history
mot 576
Capitals Àsia
WordsWords all type
CE 7
mot 545
VorstellenName, Job, alter, herkunft
Vegetables & Fruitvegetables
Phrasal verbsphrasal verbs
swedish words day1
niu prov
Fhrasal verbs
Househouse english vocabulary
State capitalsthe state capitals of the US
ANS test 3