MYTUTOR SUBJECT ANSWERS

1154 views

What is Homeostasis?

Homeostasis is the maintenance of a constant internal environment within the body.

This sounds quite confusing but don’t panic – in simpler terms, homeostasis is the process which works to keep the conditions inside the body the same. This means that the reactions happening within cells can happen under their optimum conditions, which in turn means they are more efficient.

Here are some examples of conditions that need to be regulated:

Body Temperature

Blood sugar level

Water content

Homeostasis works because of negative feedback mechanisms. Negative feedback mechanisms work like this:

A change in the system from normal à this change is detected à control mechanisms are activated, returning conditions to normal à control mechanisms are switched off

Regulation of Body Temperature

Optimum body temperature is 37.5ºC. When body temperature is different from this, control mechanisms are activated to return the body to its optimum temperature.

When too hot:

Vasodilation – blood vessels dilate allow more blood to flow through the skin.

Sweating – when sweat evaporates it removes heat energy from the skin.

When too cold:

Vasoconstriction – blood vessels constrict, conserving heat in the center of the body

Shivering – shivering is caused by muscle contraction. Some of the energy produced by respiration of the muscle cells will be lost as heat, increasing body temperature.

Yvonne W. GCSE Biology tutor, GCSE Human Biology tutor

1 year ago

Answered by Yvonne, a GCSE Human Biology tutor with MyTutor


Still stuck? Get one-to-one help from a personally interviewed subject specialist

38 SUBJECT SPECIALISTS

£18 /hr

George R.

Degree: Biology with Industrial Experience (Bachelors) - Manchester University

Subjects offered:Human Biology, Psychology+ 5 more

Human Biology
Psychology
Maths
French
English Literature
Biology
-Personal Statements-

“Hardworking and enthusiastic people person that loves the subjects I tutor and loves to learn as well as teach!”

£24 /hr

Alisha R.

Degree: Medicine (Bachelors) - York University

Subjects offered:Human Biology, Science+ 7 more

Human Biology
Science
Religious Studies
Maths
Chemistry
Biology
.UKCAT.
-Personal Statements-
-Medical School Preparation-

“Friendly medical student looking forward to helping students achieve their goals in science and maths :)”

£20 /hr

Mollie W.

Degree: Natural Sciences (Bachelors) - Bath University

Subjects offered:Human Biology, Science+ 4 more

Human Biology
Science
Maths
Further Mathematics
Chemistry
Biology

“I am a final year Natural Sciences student with a keen interest in science, problem solving and sport.”

About the author

Yvonne W.

Currently unavailable: for regular students

Degree: Biological Sciences (Bachelors) - Durham University

Subjects offered:Human Biology, Environmental Studies+ 1 more

Human Biology
Environmental Studies
Biology

“About me I am a Biological Sciences Student at Durham University. From Ecology to Molecular geneticsI love all things Biology and hope to pass this enthusiasm onto you, allowing you to reach your full potential and really enjoy your s...”

MyTutor guarantee

|  1 completed tutorial

You may also like...

Posts by Yvonne

What is Homeostasis?

What is osmosis?

Other GCSE Human Biology questions

What are the waste products of respiration?

Explain how negative feedback mechanisms help the body achieve homeostasis

What are bacteria?

How does the heart pump blood through the chambers of the heart to then send it round he body?

View GCSE Human Biology tutors

We use cookies to improve your site experience. By continuing to use this website, we'll assume that you're OK with this. Dismiss

mtw:mercury1:status:ok