Biology - 0610 CIE

Homeostasis

Gbogbo ọrọ náà

Whether you are sunbathing or shivering in the snow, your core body temperature stays close to 37 degrees Celsius. Whether you have just eaten a sugary meal or skipped breakfast, your blood glucose stays within narrow limits. This steady internal world is called homeostasis, and your body works constantly to maintain it.

In this lesson you will learn what homeostasis is, how negative feedback keeps conditions near a set point, how insulin and glucagon control blood glucose, how Type 1 diabetes is treated, and how the skin keeps your temperature constant through sweating, shivering, vasodilation and vasoconstriction.

Ebumnobi

Describe homeostasis as the maintenance of a constant internal environment
State that insulin decreases blood glucose concentration
[Supplement] Explain the concept of homeostatic control by negative feedback with reference to a set point
[Supplement] Describe the control of blood glucose concentration by the liver and the roles of insulin and glucagon
[Supplement] Outline the treatment of Type 1 diabetes
[Supplement] Identify in diagrams and images of the skin: hairs, hair erector muscles, sweat glands, receptors, sensory neurones, blood vessels and fatty tissue
[Supplement] Describe the maintenance of a constant internal body temperature in mammals in terms of: insulation, sweating, shivering and the role of the brain
[Supplement] Describe the maintenance of a constant internal body temperature in mammals in terms of vasodilation and vasoconstriction of arterioles supplying skin surface capillaries

Akọmọ Ojú-ẹkọ

Enzymes that run every cell reaction only work well within a narrow range of temperature and concentration. Homeostasis keeps those conditions steady so the reactions of life can continue reliably. Blood glucose control and temperature control are favourite exam topics, and both rely on the same idea: negative feedback.

Ọ dị na ngwa Green Bridge

Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.

Akwụkwọ ndụmọdụ zuru oke nwere eserese

Onye inyeaka mmụta AI

Mụọ n'ụzọ na-enweghị ịntaneti, oge ọbụla, ebe ọbụla

Budata ngwa ekwentị Budata ngwa kọmputa

Ọ dị na Android, Windows, macOS, na Linux

Ayẹwo Ẹkọ

Ekele diri gi maka imecha ihe karịrị na Homeostasis. Ugbu a na ị na-enyochakwa isi echiche na echiche ndị dị mkpa, ọ bụ oge iji nwalee ihe ị ma. Ngwa a na-enye ụdị ajụjụ ọmụmụ dị iche iche emebere iji kwado nghọta gị wee nyere gị aka ịmata otú ị ghọtara ihe ndị a kụziri.

Ị ga-ahụ ngwakọta nke ụdị ajụjụ dị iche iche, gụnyere ajụjụ chọrọ ịhọrọ otu n’ime ọtụtụ azịza, ajụjụ chọrọ mkpirisi azịza, na ajụjụ ede ede. A na-arụpụta ajụjụ ọ bụla nke ọma iji nwalee akụkụ dị iche iche nke ihe ọmụma gị na nkà nke ịtụgharị uche.

Jiri akụkụ a nke nyocha ka ohere iji kụziere ihe ị matara banyere isiokwu ahụ ma chọpụta ebe ọ bụla ị nwere ike ịchọ ọmụmụ ihe ọzọ. Ekwela ka nsogbu ọ bụla ị na-eche ihu mee ka ị daa mba; kama, lee ha anya dị ka ohere maka ịzụlite onwe gị na imeziwanye.

Homeostasis is the maintenance of a constant: A. external environment B. internal environment C. body mass D. heart rate Answer: B
After a sugary meal the blood glucose level rises, and the pancreas releases a hormone that brings it back down. Which hormone is this? A. glucagon B. insulin C. adrenaline D. testosterone Answer: B
When the body is too hot, the skin arterioles: A. narrow (vasoconstriction) B. widen (vasodilation) C. disappear D. stop carrying blood Answer: B
Shivering helps to warm the body because muscle contraction releases heat from: A. evaporation B. respiration C. digestion D. excretion Answer: B
Type 1 diabetes is treated mainly with regular: A. glucagon tablets B. insulin injections C. adrenaline injections D. extra sugar Answer: B