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Human Biology
A Level

What is Homeostasis and what are the principles behind it?

Firstly, we need to consider what the term Homeostasis means:

Homeostasis is defined as the maintenance of a stable internal environment.

-The internal environment ...

Answered by Giovana K. Human Biology tutor
12360 Views

If a person has a very poor diet they may have a very low concentration of proteins in the blood. This may cause oedema. Explain Why

Proteins are important to maintain the osmotic pressure within the blood vessels. Hence a person who has a poor diet that lacks protein will end up with swelling in their bodies this is called as oedem...

Answered by Beenish Z. Human Biology tutor
3170 Views

People get vitamins mainly from the foods they eat or from vitamin tablets. Give a different way in which people get some vitamin K.

Vitamin K is a fat-soluble vitamin which helps prevent bleeding  and it is synthesized by the bacterias which reside in the human intestines. Hence it is important to give this particular vitamin to a ...

Answered by Beenish Z. Human Biology tutor
3376 Views

What is a Vitamin?

Vitamins are dietary components which are required in small amounts to maintain our health. To help the concept stick let's try to understand first where the name "Vitamin" comes from.

Answered by Beenish Z. Human Biology tutor
4180 Views

What are the major parts of a neuron? What are the three types of nerve cells?

1) The nerve cell, also referred to as a neuron, has several parts that are important for its function in the nervous system. These parts are:

So...

Answered by Zuzana B. Human Biology tutor
32598 Views

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