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Describe the process of atherosclerosis and the effect it has on the properties of the blood vessel

Atherosclerosis occurs when the endothelium of a blood vessel becomes damaged. This may due to various reasons such as high blood pressure or toxins from cigarette smoke. This causes an inflammatory response...
LT
Answered by Laura T. • Biology tutor
2800 Views

Describe how vaccination can lead to protection against bacterial meningitis (6 marks)

Vaccines provide a dead/inactive form of bacterial meningitis. Phagocytes such as macrophages recognise the antigens of bacterial meningitis as foreign so engulf the pathogen forming a phagosome. The lysosom...
JH
Answered by James H. • Biology tutor
11271 Views

Explain the process of skeletal muscle contraction and why glucose is required for this process.

In skeletal muscle there exists a thick filament, myosin, and a thin filament, actin. For contraction both of these filaments need to interact causing a power stroke and muscle contraction. At rest, the myos...
SM
Answered by Shabri M. • Biology tutor
4227 Views

Describe the part played by each of the organelles involved in the production and secretion of the enzymes.

The Nucleus contains the DNA code for the amino acid sequence (2) 3. The Nucleolus makes rRNA (4) 5. The Ribosomes translate mRna in protein synthesis 6. The endoplasmic reticulum allows for the transport of...
AM
Answered by Aoife M. • Biology tutor
3355 Views

Use your knowledge of Water Potential applied to the GIT to describe what can cause or prevent Constipation

Water Potential is the measure of the ability of water molecules to move freely in solution. A solution of pure water where there is no solute and all of the water molecules are free to move, the water poten...
TM
Answered by Teresa M. • Biology tutor
10683 Views