Essay
aasignment 5- homeostasis M2, p6, D1, D2
- Institution
- OCR
achieves M2, P6 , D1 and D2 of assignment 5- homoeostasis work is marked and passed by teacher
[Show more]
3 reviews
By: 40089792 • 6 year ago
By: bodilawns • 6 year ago
By: tomoke2016 • 6 year ago
good
Content preview
HomeostasisWhat is Homeostasis
Homeostasis is the control of internal conditions, be it temperature, specific blood
conditions or other variables within living organisms. Homeostasis is the conditions inside
our body must be controlled within a certain limits. These conditions include water content,
ion content, and body temperature and blood glucose concentration. The thermoregulatory
centre is the part of the brain that monitors and controls body temperature. The pancreas
meanwhile monitors and controls blood glucose concentration. It produces a hormone
called insulin that reduces blood glucose levels. Diabetes is a disease which can be caused
by insufficient insulin.
Negative feedback
Negative feedback is an important type of control that is found in homeostasis. A negative
feedback control system react when conditions change from the ideal or set point and puts
the conditions to the original set point. Negative feedback ensures that, in any control
system, changes are reversed and put back to the original set level. Negative feedback
keeps our body temperature at a constant 37°c. If we get too hot, blood vessels in our skin
become larger and we lose heat and cool down. If we get too cold blood vessels in our skin
become smaller, we lose less heat and our body warms up, this is called negative feedback.
Examples of things controlled by homeostasis…
Maintaining a constant internal environment is called homeostasis. The nervous system and
hormones are responsible for this. Here are some of the other things inside our body that
are controlled:
Blood sugar level
This is controlled to give cells a constant supply of energy. The blood sugar level is
controlled by the release and storage of glucose, which is then controlled by a hormone
called insulin.
Body temperature
This is controlled to balance the temperature at which enzymes work best, which is 37°C.
Our body temperature is controlled by:
Controlling blood flow to the skin
Sweating
Shivering
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller sultana55. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £7.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
75759 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy revision notes and other study material for 14 years now