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Explain the exchange of oxygen between an alveolus and a capillary.

The blood in the capillary has just returned to the lungs from the rest of the body, so contains a low concentration of oxygen. The alveolus contains air that has just been breathed in by ventilation, so ...

Answered by Anastasia D. • Biology tutor

3358 Views

Work out area of shaded region in terms of pi. (https://prnt.sc/hqfbsl) [Question link]

Area of square : Base x Height.

Area of Circle: π x (Radius)².

Looking at the diagram we are given the dimensions of the base or he...

Answered by Mohammed A. • Maths tutor

10997 Views

What are the impacts on host countries of voluntary migration?

Using the UK as a case study, voluntary migration has benefits and costs to the host nantion. Voulntary migration can help balance demographic changes to sustain a healthy working age population. In doing...

Answered by Francesca B. • Geography tutor

5666 Views

How do I know which case to use?

There are 4 cases in German- Nominative, Accusative, Dative and Genitive. First you must know the gender of the noun to work out the case. Nominative is used for a person or thing which does the action of...

Answered by Daniel W. • German tutor

2062 Views