Available Answers

1. 1.

   Choose and write the correct answer(MCQs):

   1. When we breathe in, we suck air into parts of our body called ___________.
      1. nostril
      2. trachea
      3. lungs
      4. pharynx
   2. The process of taking in oxygen and giving out carbon dioxide is called ___________.
      1. internal respiration
      2. external respiration
      3. breathing
      4. both(b) and(c)
   3. Exhalation is ______________.
      1. taking in oxygen
      2. giving out oxygen
      3. taking in carbon dioxide
      4. giving out carbon dioxide
   4. The wind pipe is also called a ____________.
      1. pharynx
      2. trachea
      3. bronchus
      4. diaphragm
   5. During inhalation the ribs ______________.
      1. move upwards
      2. move downwards
      3. do not move
      4. move inwards 
2. 2.

   Fill in the blanks:

   1. During respiration ____________ is taken in and ____________ is given out.
   2. The waste product of respiration is ____________.
   3. The oxygen carrying pigment in the blood is ____________.
   4. The leaves of plants have small pores called ____________.
   5. ____________ is a single-celled animal.
3. 3.

   Match the column A with column B:

   A	B
   1. Earthworms	a. Gills
   2. Fish	b. Stomata
   3. Cockroaches	c. Skin
   4. Plants	d. Spiracles
   5. Diaphragm	e. Haemoglobin
   6. Red Blood Cells	f. Chest cavity

4. 4.

   What is respiration? Name its two processes.
5. 5.

   What is the main difference between aerobic and anaerobic respiration?
6. 6.

   What happens to your breathing rate when you exercise?