Last updated on August 30th, 2023 at 10:10 pm
Class 7 Respiration in Organisms Extra Questions
Respiration in Organisms Fill in the blanks:-
- Each organism is made up of small units called ………….[cells ]
- In an organism, a ……….. is the smallest structural and functional unit. [cell]
- We breathe out air which is rich in ……………[carbon dioxide]
- Insects exchange gas through a network of tubes called ………..[tracheae]
- Earthworms exchange gases through their moist …………[skin]
- A ………… is a single-celled organism. [yeast]
- The process of breaking down food to release energy is called ………. [respiration.]
- Frogs breathe through their lungs and ………..[skin]
- In insects, gas exchange takes place through ………[spiracles]
- Plants exchange gases through their ………..[stomata.]
- Inhaled air contains a high concentration of …[oxygen]
- Anaerobic respiration produces ………….& ……[carbon dioxide and alcohol]
- The act of …….involves both inhalation and exhalation.[ breathing]
- In humans, the …………are the main organ of respiration.[ lungs]
- An organ that lies at the bottom of the chest cavity is the ……..[diaphragm]
Answer the following Questions
Define the following terms:
Anaerobes – Anaerobes are organisms that can survive without air, such as yeast
Inhalation & Exhalation – Taking in oxygen-rich air and exhaling carbon dioxide-rich air are known as inhalation and exhalation, respectively.
Breath Rate – A person’s breathing rate is determined by how many times they breathe per minute
[Q] What is the function of cell?
Nutrition, transport, excretion, and reproduction are all functions performed by each cell of an organism.
[Q] What is cellular respiration?
Cellular respiration occurs when foods are broken down in the cell and energy is released.
[Q] What are the main organs of the respiratory system?
The respiratory system consists of the nose, mouth, pharynx, larynx, trachea, bronchi, and bronchioles.
[Q] Define Stomata?
The stomata are tiny pores found on the underside of a leaf. They contribute to the exchange of oxygen and carbon dioxide in a leaf as well as the loss of water through transpiration.
[Q] What is the function of the Diaphragm?
A diaphragm is an elastic membrane at the bottom of the chest cavity that can stretch like a balloon and pull-down making them larger while inhalation.
[Q] Define Aerobic Respiration?
It takes place in the presence of oxygen. Glucose is completely oxidised to carbon dioxide and water. A large amount of energy is released. The end products of this reaction are carbon dioxide and water. This process is carried out by plants, animals, and humans.
[Q] Define Anaerobic Respiration?
The following reaction occurs in the absence of oxygen: Glucose is incompletely oxidized into Alcohol and carbon dioxide. The energy released is minimal Carbon dioxide and coal or lactic acid are the products of this reaction, which is carried out by bacteria and yeast.
[Q] Why you get muscle cramps after heavy exercise?
Muscle cramps occur when cells respire anaerobically. When glucose breaks down partially, it produces lactic acid. This builds up in muscles and causes cramps. A hot water bath or massage relieves cramps. Hot water baths and massage improve blood circulation.
The increase in oxygen supply to the muscles results in the breakdown of lactic acid into carbon dioxide and water as a result.
[Q] Describe the process of breathing?
Our nostrils take in air When we inhale, air passes through our nostrils into the nasal cavity. The air then reaches our lungs through the windpipe. The chest cavity is filled with lungs, which are surrounded by ribs. The floor of the chest cavity is made of a large muscular sheet called the diaphragm. Breathing involves the movement of both the diaphragm and the rib cage.
When we inhale, the ribs move up and outwards and the diaphragm moves down. This movement increases the chest cavity and allows air to rush into the lungs.
When you exhale, the ribs move down and inwards, and your diaphragm rises. Your chest cavity shrinks, and the lungs are emptied.
