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Describe how a reflex occurs?

A reflex is an innate (in built) action designed to keep an organism safe from harm. A good example of a reflex is to imagine you touch a hot pan, you immendiately withdraw your hand from the painful stimulu...
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Answered by Isabelle H. • Biology tutor
7960 Views

What is the best way to go about answering a long answer biology question?

Answering questions in biology that offer more marks is all about key words - usually the examiner has a few of these in front of them that offer a mark simply for using the word in your answer. The good thi...
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Answered by Daisy Y. • Biology tutor
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Why is the human circulation em called a double circulation system?

In the double circulation system there are two routes that the blood can take: 1. Through the lungs 2. To the rest of the body The blood starting in the heart has no oxygen in it. It flows from the heart and...
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Answered by Elizabeth L. • Biology tutor
16509 Views

What is the difference between osmosis and active transport?

First of all we have to understand that there are concentration gradients between cells and the outside. A higher concentration of solute is when there is more solute (eg salt) dissolved in the solvent (e.g ...
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Answered by Elizabeth L. • Biology tutor
53926 Views

What happens to the blood when it enters the heart?

The heart has four chambers; the right ventricle and atrium, and the left ventricle and atrium. Deoxygenated blood, once it has travelled the entire body, enters the heart from the vena cava into the right a...
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Answered by Giulia Z. • Biology tutor
4554 Views