S4_Science_Human_System

Digested food undergoes process X in body cells.

What is process X?

Which blood component transports oxygen?

The diagram shows parts of the digestive system.

Which part is to produces enzymes that digest food?

The graphs show the rate of reaction of two enzymes, X and Y, at different pH conditions and temperatures.

Which enzymes that works best in acidic conditions and the enzyme that works best at around 35∘C?

A student tests exhaled air with cobalt chloride paper.

What are her observations?

Which part of the digestive system break down food into simpler substance?

Which component of blood transports food substances around the body?

Which part of the respiratory system can be blocked by food to cause choking?

A student measures the following quantities.

1 pulse rate

2 heart rate

3 blood pressure

Which measurements are used to provide information about the flow of blood through the body?

Which diagram shows the direction of blood flow through the heart?