Science

On an average, an adult human being at rest breathes in and out 15–18 times in a minute. During heavy exercise, the breathing rate can increase upto 25 times per minute. While we exercise, not only do we breathe fast, we also take deep breaths and thus inhale more oxygen.

The number of times a person breathes in a minute is termed as the breathing rate. During breathing inhalation and exhalation take place alternately. A breath means one inhalation plus one exhalation

. The taking in of air rich in oxygen into the body is called inhalation and giving out of air rich incarbon dioxide is known as exhalation.

Anaerobic respiration takes places in the muscle cells to fulfil the demand of energy: In muscle, in the absence of oxygen Glucose → lactic acid + energy( 2ATP)

There are some organisms such as yeast that can survive in the absence of air. They are called anaerobes.

Anaerobic respiration In the absence of oxygen, glucose breaks down into alcohol and carbon dioxide, as given below:-in the absence of oxygen, Glucose →ethyi alcohol + carbon dioxide + energy(2 ATP)

In the cell, the food (glucose) is broken down into carbon dioxide and water using oxygen. When breakdown of glucoseoccurs with the use of oxygen it is called aerobic respiration. Food can also be broken down, without using oxygen. This is called anaerobic respiration. Breakdown of food releases energy. in the presence of oxygen Glucose …

Aerobic respiration and anaerobic respiration. Read More »

The process of breakdown of food in the cell with the release of energy is called cellular respiration.