MEDIUM
Earn 100

How does gas exchange occur in the lungs and tissues?

Important Questions on Life Processes

HARD
Science>Biology>Life Processes>Respiration in Humans

Vocal cords are found in _____

MEDIUM
Science>Biology>Life Processes>Respiration in Humans

The middle step between the gaseous exchange at lung’s level and tissue level is _____.

MEDIUM
Science>Biology>Life Processes>Respiration in Humans
Reason for the diffusion of oxygen from alveoli to blood.
EASY
Science>Biology>Life Processes>Respiration in Humans
When air is blown from mouth into a test-tube containing lime water, the lime water turned milky due to the presence of
EASY
Science>Biology>Life Processes>Respiration in Humans
Why are alveoli so small and uncountable in number?
MEDIUM
Science>Biology>Life Processes>Respiration in Humans
In humans, which of the following is not a step in respiration?
EASY
Science>Biology>Life Processes>Respiration in Humans

Which contains more carbon dioxide: exhaled air or inhaled air? Why?

HARD
Science>Biology>Life Processes>Respiration in Humans
What happens when carbon dioxide becomes excessive in the bloodstream?
EASY
Science>Biology>Life Processes>Respiration in Humans
Cotyledons are also called-
EASY
Science>Biology>Life Processes>Respiration in Humans
Why does the rate of breathing increase while walking uphill at a normal pace in the mountains? Give two reasons.
EASY
Science>Biology>Life Processes>Respiration in Humans
The blood leaving the tissues becomes richer in
EASY
Science>Biology>Life Processes>Respiration in Humans
Air leaves the tiny sacs in the lungs to pass into capillaries. What modification is needed in the statement?
MEDIUM
Science>Biology>Life Processes>Respiration in Humans
What is the normal percentage composition of respiratory gases in the inspired air and expired air respectively?
MEDIUM
Science>Biology>Life Processes>Respiration in Humans
What is tissue respiration?
MEDIUM
Science>Biology>Life Processes>Respiration in Humans
Why is it dangerous if someone is trapped in a smoke-filled room? 
MEDIUM
Science>Biology>Life Processes>Respiration in Humans
How are most of the carbon dioxide transported in blood?
HARD
Science>Biology>Life Processes>Respiration in Humans
Take 3 test tubes. Fill 3/4th of each with water. Label them X, Y, and Z. Keep a snail in test tube X, a water plant in test tube Y, and in Z, keep snail and plant both. Which test-tube would have the highest concentration of CO2? Give reason in support of your answer.
EASY
Science>Biology>Life Processes>Respiration in Humans
 Food sometimes enters our wind pipe which results in choking. How does it happen?
MEDIUM
Science>Biology>Life Processes>Respiration in Humans
How is oxygen and carbon dioxide transported in human beings?
MEDIUM
Science>Biology>Life Processes>Respiration in Humans
Explain the role of blood in respiration.