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Describe how the structure of alveoli in the lungs enables efficient oxygen supply during aerobic respiration?

The alveoli are sac like structures which have a large surface area to volume ratio allowing for fast diffusion of oxygen into the blood (Fick's law). This large SA:V ratio is generated because the alv...

PB
Answered by Philip B. Biology tutor
6604 Views

How does the heart pump blood through the chambers of the heart to then send it round he body?

Firstly the heart is myogenic, thereofore is controlled by the autonomic nervous system hence doesnt require conscious control. The pumping mechanism of the heart begins with stimulation of the Sinoatrial...

KB
6030 Views

How do I calculate the gradient of a linear (straight) graph?

To find the gradient of a straight line we can use the change in the X and Y directions.

The gradient (Slope) of a straight line is defined as :

​Grad = (Change in Y) / (Cha...

NA
Answered by Nathan A. Maths tutor
6470 Views

How can I improve my philosophical essay writing?

One thing to remember when writing philosophical essays is that it is very important to be as clear as possible. Let's face it, philosophy is difficult, full of categorical imperatives and hard problem...

DD
3223 Views

What features of the nephron allow ultrafiltration to take place in the kidneys?

The glomerulus is a knot of cappilaries inside the Bowman's capsule. The afferent arteriole (small blood vessel leading into the glomerulus) has a much larger diameter than the efferent arteriole (smal...

LE
Answered by Laura E. Biology tutor
25410 Views

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