Sometimes when we do heavy exercise, anaerobic respiration takes place in our muscle cells. What is produced during this process?
  • alcohol and lactic acid
  • alcohol and CO
  • lactic acid and CO
  • lactic acid only
Yeast is used in wine and beer industries because it respires.
  • aerobically producing oxygen
  • aerobically producing alcohol
  • anaerobically producing alcohol
  • anaerobically producing CO
During the process of exhalation, the ribs move
  • down and inwards
  • up and inwards
  • down and outwards
  • up and outward
Which are the gases involved in breathing?
  • O and NO
  • O and SO
  • O and O
  • O and CO
Name the organ of the body in which the blood is oxygenated.
  • Heart
  • Lungs
  • Lever
  • Pancreas
After heavy exercise, due to the accumulation of which substance we get muscle cramps ?
  • Malaic acid
  • Fumaric acid
  • Lipoic acid
  • Lactic acid
Yeasts are used in
  • wine and beer industry
  • bakery
  • in both
  • none of these
In the following figure of respiratory system organs labelled by 1 and 2 are respectively:
  • Tracheae, Lungs
  • Lungs, Tracheae
  • Nasal cavity, Lungs
  • Lungs, Nasal cavity
Breathing rate in human beings in normal condition is
  • 12-15 times in a minute
  • 15-18 times in a minute
  • 18-22 times in a minute
  • 22-25 times in a minute
which is of these animals can be breathe through lungs as well as skin
  • Frog
  • Fish
  • crocodile
  • earthworm
Match the column
class7-science-chapter-10-mcq-1.png
  • p ->iv, q ->iii, r ->ii, s- >i
  • p ->ii, q ->iv, r ->i, s- >iii
  • p ->i, q ->iii, r ->iv, s- >ii
  • p ->iv, q ->iii, r ->i, s- >ii
During inhalation
  • ribs move up and outwards and diaphragm moves down
  • ribs move down and inwards, while diaphragm moves up
  • ribs move lefts , while diaphragm moves right
  • ribs move right , while diaphragm moves left
During Exhalation
  • ribs move up and outwards and diaphragm moves down
  • ribs move down and inwards, while diaphragm moves up
  • ribs move lefts , while diaphragm moves right
  • ribs move right , while diaphragm moves left
Yeast is used in wine and beer industries because it respires
  • aerobically producing oxygen.
  • aerobically producing alcohol.
  • anaerobically producing alcohol.
  • anaerobically producing CO2
The respiratory gases are
  • oxygen and Nitrogen dioxide
  • Oxygen and Carbon dioxide
  • Carbon dioxide and Sulphur dioxide
  • oxygen and ozone
The gaseous exchange during the respiration in animals happens in
  • Bronchi
  • trachea
  • lungs
  • Alveoli
What is the function of the hair in the nose?
  • To secrete mucus.
  • To trap dust particles.
  • To protect the mucus glands.
  • To prevent germs from entering the lungs.
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