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How is the structure of alveoli in the lungs optimised for gas exchange?

Alveoli are microscopic air sacs in the lungs. During inspiration (breathing in), oxygen diffuses from the air in the alveoli into the blood. At the same time, carbon dioxide carried in the blood diffuses ou...
RF
Answered by Robert F. • Biology tutor
6798 Views

Explain the movements of Glucose through the Nephron.

Ultrafiltration in the Bowman's capsule- happens due to high pressure created by the difference in diameter of the Afferent and Efferent arterioles. Glucose now in filtrate and not blood.Glucose then travels...
HW
Answered by Holly W. • Biology tutor
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What is nitrogen fixation?

Conversion of answering gas into Nigerian containing compounds. Lightning can cause this, but there are also two types of bacteria which perform this role: 1) Mutualistic N-fixing bacteria: live in nodules o...
XO
Answered by Xuan O. • Biology tutor
3771 Views

How do you go about writing a 25 mark essay question?

Always start with planning. Even if there is little time, mind map briefly as many points that you could talk about. Ideally you need to write about at least five.Always start the essay with a brief introduc...
DL
Answered by Dillon L. • Biology tutor
12500 Views

Give 2 adaptions of the alveoli that maximise gas exchange

Curved surfaces, providing a large surface areaThin, providing a short diffusion distance
MH
Answered by Michael H. • Biology tutor
3290 Views