Respiration in Organisms - UPSC Sci & Tech Free MCQ Test with solutions

Insect bodies have openings, called spiracles, along the thorax and abdomen. These openings connect to the tubular network, allowing oxygen to pass into the body, regulating the diffusion of CO₂ and water vapor. 

The part of breathing during which oxygen rich air is taken in is called inhalation.

During exhalation, i.e. releasing air during respiration, the ribs move downwards to reduce the volume of the thoracic cavity.
During exhalation, your diaphragm relaxes and moves upward into the chest cavity. The intercostal muscles between the ribs also relax to reduce the space in the chest cavity. As they relax they position the rib cage downwards and inwards.

Stomata are microscopic pores found on the surface of leaves and are responsible for gas exchange.
They allow plants to take in carbon dioxide and release oxygen, playing a crucial role in photosynthesis and respiration.

Gills are respiratory organs in fish. Gills intake oxygen from water.

Frogs are unique creatures that can breathe through both their skin and lungs. This ability allows them to take in oxygen efficiently, especially when they are in water.

Here are some key points about frogs' breathing:

• Skin respiration: Frogs can absorb oxygen directly from the water through their skin.
• Lung respiration: When on land, they primarily use their lungs to breathe air.
• Moist skin: Their skin needs to remain moist for effective oxygen absorption.

This dual method of breathing helps frogs survive in various environments, making them fascinating amphibians.

When cells break down food with the help of oxygen, it is called aerobic respiration. This is like how our bodies get energy from the food we eat by using oxygen. It helps us move, play, and do all our activities!

Yeasts are single-celled organisms. They respire anaerobically and during this process yield alcohol. In this process glucose breaks down into alcohol (ethanol) and carbon dioxide.

Athletes breathe faster and deeper after a race to supply more oxygen to their cells. During intense physical activity, the body's demand for energy is high, but the oxygen supply is limited. This leads to anaerobic respiration in muscle cells. After the race, rapid and deep breathing helps replenish the oxygen deficit. Interestingly, some athletes practice controlled breathing techniques to improve their performance and recovery.

The normal range of breathing rate per minute for an average adult at rest is typically between 12 and 18 breaths per minute. From the options you provided, the closest range is 15-18 breaths per minute.