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John begins to exercise and his heart rate increases - explain how and why his heart rate increases

His heart rate increases as his cellular demand for oxygen increases and the amount of carbon dioxide in his blood increases, this is due to an increase in the rate respiration because of increased ATP de...

SM
Answered by Sian M. Biology tutor
2908 Views

How does a reduction in interest rates affect the level of aggregate demand

Aggregate demand (AD) is total spending on goods and services. The formula = AD = C (consumption) + I (investment) + G (government spending) + (X (exports) - M (imports))Interest ...

IP
5022 Views

During exercise changes happen at the skin involving blood vessels and sweat glands, describe these changes.

During exercise body temperatures increase, as this can be damaging to biological processes (enzymes may be denatured) the body tries to maintain a constant body temperature in a process called homeostasi...

AC
Answered by Adam C. Biology tutor
7876 Views

What is the relative molecular mass of ammonia?

Ammonia is NH3.
Nitrogen has a relative atomic mass of 14.
Hydrogen has a relative atomic mass of 1.
14 + (3 x 1) = 17
Ammonia has a relative molecular mass of 17.

AC
Answered by Adam C. Chemistry tutor
48329 Views

How do I write an introduction

A good introduction will simultaneously outline the argument your essay will take and acknowledge the question. Your individual take on the question should be apparent from the introduction e.g. whether y...

KP
Answered by Katie P. English tutor
1887 Views

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