Top answers

Some babies are born with a hole between the right and the left ventricles. These babies are unable to get enough oxygen to their tissues. Suggest why.

This question is an example of the 'suggest' questions that are asked. 'The hole is due to the failure of the foramen ovale to close. As a result, oxygenated blood from the left ventricle mixes with deoxygen...
LH
Answered by Lamis H. • Biology tutor
11350 Views

How is blood glucose controlled in homeostasis?

Blood glucose concentration is controlled mainly by the pancreas. If there is a rise in blood glucose concentration the pancreas will detect this and the beta cells will secrete insulin. At the same time the...
AP
Answered by Anushri P. • Biology tutor
3843 Views

What happens during mitosis?

Mitosis consists of four stages: prophase, metaphase, anaphase and telophase. During prophase, the chromosomes that have already been replciated during interphase become condensed, making them visible under ...
VG
Answered by Valentina G. • Biology tutor
11730 Views

How does the kidney produce concentrated urine?

There are various mechanisms by which the kidney produces concentrated urine. The most important of these are the loop of Henle and the role of ADH, anti-diuretic hormone. Let's examine each of these in turn...
AH
Answered by Amy H. • Biology tutor
25893 Views

How does vaccination provide immunity?

Pathogens are microorganisms that can cause disease. If they enter the body, they can start an immune response. On their surface, they have antigens, which are substances that start that immune response. Ant...
LF
Answered by Lana F. • Biology tutor
3174 Views