Science MCQ (1 Marks)

Fish breathe with the help of gills which are richly supplied with blood vessels. The gills help the fish to

Joggers often develop cramps in calf muscles. Which of these chemicals, when produced, causes muscle cramps?

People use different methods to get rid of nose hairs such as trimmers, waxing and many more. However, some health specialists are against the idea of removing nose hair. What likely is the concern regarding the removal of nose hairs?

A teacher asked a student to observe inhalation. The student observed an expansion in his chest during inhalation. The teacher told the student that it is because of the movement of ribs and diaphragm. What movement is likely to be found in ribs and diaphragm of the student during inhalation?

Naman recorded that at rest, he was breathing in and out at the rate of 18 times per minute. After playing the football for 15 minutes, his breathing rate increased up to 27 times per minute. What could be the reason for the change in breathing rate?

The breakdown of food particles takes place inside the cell and during this process, lots of energy releases out. Which life process helps the cell to perform this function?

Cells perform various functions like digestion, excretion, reproduction and transport. This is the reason the cells require energy to perform all these activities in organism. What is the source of the energy which is utilised by the cells?

Choose which among the following can breathe through lungs as well as through skin?

Which of these animals breathes through its skin?

Earthworms and frogs breathe through their skin because of which the skin of both the organisms is

Spiracles on the body of insects are connected to a network of thin air tubes called

During the process of exhalation, the ribs move

Main organ of human respiratory system is

Minimum loss of energy takes place while we are

Sometimes when we do heavy exercise, anaerobic respiration takes place in our muscle cells. What is produced during this process?

Yeasts are used in

Yeast is used in wine and beer industries because it respires

The raw material for cellular respiration is

The mountaineers carry oxygen with them because

During exhalation, the ribs

Normal range of breathing rate per minute in an average adult person at rest is

During heavy exercise, we get cramps in the legs due to the accumulation of

In cockroaches, air enters the body through

Percentage of oxygen in the exhaled air is

Birds breathe through

Unwanted particles in air are trapped in which part of the human respiratory system?

Which of the following processes allow exchange of gases?