Friday , March 29 2024
Respiration in organism

NCERT 7th Class (CBSE) Science: Respiration in Organism

Question: What do you mean by ‘stomata’ apparatus?

Answer: Stomata apparatus means stomata along with nearby guard cells and other cells.

Question: What are the main organs of the respiratory system?

Answer: Main organs that help in respiration are :

  1. Nostrils (The passages in the nose)
  2. Trachea (Windpipe)
  3. Bronchi
  4. Lungs

Question: What chemical reaction occur during anaerobic respiration in yeast?

Answer: In yeast, the cellular glucose is converted into alcohol and carbon dioxide which give us energy.

Question: An athlete suffers from muscular cramps while running a race. How can you help him overcome the quips?

Answer: To relief from these cramps we should massage the affected part or take a hot bath.

Question: How does exchange of gasses occur in the following:

Answer:

  1.  Fish: fish have special structure called girls. Dissolved oxygen is used from the water entering the gills. Gills are well supplied with blood for exchange of blood.
  2. Cockroach: Cockroaches movement of draws air in and out of the opening called spiracles. These openings are present on the body surface and are connected internally with a network of branched air tubes (trachea) and their branches (Tracheoles).

Question: How are combustion and cellular respiration similar to each other? In what ways are they different?

Answer: Similarities – During cellular respiration the sugar molecules in food are form carbon dioxide and water and energy is given out.

C6 H12 O6+ 602 → 6CO2 + 6H2O + energy

This is similar to the chemical reaction that occurs during burning or combustion.

Parameter
Combustion
Cellular Respiration
Rate
Combustion is a fast process.
Cellular Respiration is a slow process.
Temperature
It occurs at high temperature.
It occurs at body temperature.
Place
It can occur anywhere.
It occurs only in living cells.
Energy
Energy is released in a single step in the form of heat and light.
Energy is released in steps and stored in chemical molecules called ATP.

Check Also

10th Science NCERT

How do Organisms Reproduce? MCQs: 10th Science Ch 08

How do Organisms Reproduce? MCQs: CBSE Class 10 Science Chapter 08 How do Organisms Reproduce? …