Top answers

What are the two main forms of biological classification, and how do they differ?

Artificial classification is used to divide organisms by their characteristics, which can vary depending on the specific situation which you are considering. Features that are considered are known as analogo...
LK
Answered by Luke K. • Biology tutor
7018 Views

How are red blood cells adapted to carry out their function?

Contain haemoglobin - a molecule that can bind reversibly to oxygen. Biconcave disk shape - increases surface area to allow more diffusion of oxygen. No nucleus - allows more space for haemoglobin. Flexible ...
LC
Answered by Lily C. • Biology tutor
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Describe the electrical activity that occurs during the cardiac cycle?

The cardiac cycle, by convention, is considered to begin with depolarisation of the sino-atrial node (SAN). This depolarisation spreads across the two atria, causing the right and left atria to contract. The...
LK
Answered by Luke K. • Biology tutor
3156 Views

Describe how an atheroma may lead to a myocardial infarction.

An atheroma is the deposition of fatty material in the innermost lining of an artery (caused by the process of 'atherosclerosis'). Atheromas have a tendency to rupture and this increases the likelihood of th...
JW
Answered by Jovian W. • Biology tutor
9254 Views

Name the process by which fatty acids and glycerol enter the intestinal epithelial cell from the lumen of the intestine

Simple diffusion - fatty acids and glycerol are lipophilic and hydrophobic, therefore can diffuse straight through the lipid bilayer membrane of the epithelial cells down the concentration gradient
JD
Answered by Jack D. • Biology tutor
12637 Views