MEDIUM
Lower Secondary Stage 8
IMPORTANT
Earn 100

Why do alveoli have thin walls?

Important Questions on Respiration and Circulation

EASY
Lower Secondary Stage 8
IMPORTANT
Cambridge Lower Secondary Science Stage 8 : Student's book>Chapter 2 - Respiration and Circulation>Exercise 14>Q 6

How do alveoli change the surface area of the inside of a lung? Why is this adaptation important?

MEDIUM
Lower Secondary Stage 8
IMPORTANT
Cambridge Lower Secondary Science Stage 8 : Student's book>Chapter 2 - Respiration and Circulation>Exercise 14>Q 7
Explain how capillaries are adapted for gaseous exchange. 
EASY
Lower Secondary Stage 8
IMPORTANT
Cambridge Lower Secondary Science Stage 8 : Student's book>Chapter 2 - Respiration and Circulation>Exercise 15>Q 8
Give another name for the windpipe. 
EASY
Lower Secondary Stage 8
IMPORTANT
Cambridge Lower Secondary Science Stage 8 : Student's book>Chapter 2 - Respiration and Circulation>Exercise 15>Q 9
The trachea divides into many smaller tubes. What structures are present at the ends of all these tubes?
MEDIUM
Lower Secondary Stage 8
IMPORTANT
Cambridge Lower Secondary Science Stage 8 : Student's book>Chapter 2 - Respiration and Circulation>Exercise 15>Q 11
Describe how diaphragm muscles increases the volume of the chest. What happens when your chest volume increases?
MEDIUM
Lower Secondary Stage 8
IMPORTANT
Cambridge Lower Secondary Science Stage 8 : Student's book>Chapter 2 - Respiration and Circulation>Exercise 15>Q 12
A student inhales and exhales six times in 30 seconds, what is the breathing rate?
EASY
Lower Secondary Stage 8
IMPORTANT
Cambridge Lower Secondary Science Stage 8 : Student's book>Chapter 2 - Respiration and Circulation>Investigating changes in breathing rate>Q A1
What effect does exercise have on breathing rate?
EASY
Lower Secondary Stage 8
IMPORTANT
Cambridge Lower Secondary Science Stage 8 : Student's book>Chapter 2 - Respiration and Circulation>Exercise 17>Q 13
What is the difference between respiration and breathing?