Respiration in Organisms

When inhaled air enters lungs

1. Diaphragm moves down
2. Diaphragm moves up
3. There is no effect on the diaphragm
4. Ribs move towards inside

Why yeasts are used to make wine and beer?

1. Because they are multi-cellular organisms
2. Because they respire aerobically
3. Because they produce alcohol
4. All of them

In muscles, glucose breaks to give lactic acid and energy in

1. In presence of oxygen
2. In absence of oxygen
3. Both presence and absence of oxygen
4. Glucose breakdown never takes place in muscles

Match: Gills - Fishes, Inhalation - Taking in air, Aerobic-respiration - Presence of oxygen, Stomata - Leaves

1. A-(iii), B-(iv), C-(ii), D-(i)
2. A-(i), B-(iv), C-(ii), D-(iii)
3. A-(i), B-(ii), C-(iii), D-(iv)
4. A-(ii), B-(iv), C-(iii), D-(i)

Yeasts are single-celled micro-organisms which are also called as anaerobes, because

1. they can survive only in presence of oxygen
2. they can survive in absence of oxygen
3. they can survive both in absence and presence of oxygen
4. None of above

Respiratory exchange in earthworms occurs through the skin. Because

1. their skin has holes called spiracles
2. their skin is dry and rough
3. their skin is thin and moist
4. All of the above

A breath means

1. inhalation of air rich in oxygen
2. exhalation of air containing carbon-di-oxide
3. one inhalation plus one exhalation
4. one contraction and relaxation

Like other living organisms plant also respire for their survival. Respiration in plants occur through

1. Flowers of different colours
2. root hair present underground
3. Tiny pores present on leaves
4. All of the above

Aquatic animals like fishes can survive under water. The reason for this is

1. a pair of lungs present in their chest cavity
2. they have gills for breathing
3. they inhale through mouth
4. they do not breathe at all

Underground part of plant i.e. root absorbs air from ..........

1. atmosphere
2. soil
3. water
4. all of these

Breathing is a part of respiration, during which exchange of gases occurs by ............ and ..........

1. inhalation and exhalation
2. contraction and relaxation
3. both a and b
4. none of these

A large muscular sheet called ............ forms the floor of the chest cavity

1. rib
2. diaphragm
3. spiracle
4. wind-pipe

Main respiratory organ of cockroach are

1. Lungs
2. Tracheae
3. Skin
4. All of these

Sometimes after heavy exercise we feel muscle cramps. This is due to accumulation of ............ in muscles.

1. Oxygen
2. Lactic acid
3. carbon-di-oxide
4. water

During breathing air rich in carbon-di-oxide is given out and this process is known as

1. respiration
2. exhalation
3. excretion
4. All of the above

Lactic-acid is produced as a by-product during

1. aerobic respiration
2. anaerobic respiration
3. both aerobic and anaerobic respiration
4. None of these

During heavy exercise like swimming, running, cycling etc, rate of breathing

1. decreases
2. increases
3. stops
4. both decreases and increases

Skeletal structures which protect chest-cavity are

1. wind-pipe
2. ribs
3. trachea
4. diaphragm

Animals like Cow, Buffalo, Dog and Cat respire through

1. Skin
2. Lungs
3. Gills
4. Spiracles

The main organs required for breathing are

1. Nostrils and nasal cavity
2. Trachea (wind-pipe)
3. Lungs
4. All of the above

Cellular respiration takes place in the cells of all organisms. It is of two types.

1. Aerobic respiration
2. Anaerobic respiration
3. inhalation
4. Both Aerobic and Anaerobic respiration

The respiratory organs of frog are

1. Lungs
2. Skin
3. Both Lungs and Skin
4. None

An organism which can survive in the absence of oxygen is

1. cockroach
2. yeast
3. fish
4. all

Partial breakdown of glucose during heavy exercise produces

1. carbon-di-oxide
2. water
3. lactic-acid
4. all

When any unwanted particle, such as pollen, dust etc. enters nasal cavity, we

1. yawn
2. sneeze
3. both
4. none

The process of breakdown of food in the cell with the release of energy is called

1. breathing
2. digestion
3. respiration
4. all of the above

Cockroach has small openings on the sides of its body through which air goes in and comes out. These openings are called

1. nasal cavity
2. wind-pipe
3. spiracles
4. All of the above

In our body anaerobic respiration is performed by

1. heart
2. lungs
3. muscles
4. all of the above