10 questions
These organs help our body to breath except
Nasal cavity
Lungs
Trachea
Mouth
Which of the following processes transport oxygen from the alveoli into the capillaries?
Respiration
Inhalation
Exhalation
Diffusion
During exhalation, what will happen to these respiratory organs?
Diaphragm moves downward and flatten
Rib cage moves upwards and outwards
intercostal muscles relax
Intercostal muscles contract
When inhalation
Thoracic cavity become smaller
The air pressure in the thoracic cavity increases
The air pressure n the thoracic cavity decreases
Air is pushed out
The composition of the oxygen in inhaled air is
21%
16%
4%
0.04%
The composition of carbon dioxide in exhaled air is
79%
21%
4%
0.04%
What is diffusion process?
Molecules move from a region of lower concentration to a region of higher concentration
Molecules move from a region of higher concentration to a region of lower concentration
State the products of respiration in the body cells?
Oxygen, carbon dioxide and water
glucose, oxygen and water
carbon dioxide, water and oxygen
carbon dioxide, water and energy
Following are the characteristics of alveoli that make it efficient for gaseous exchange except:
Thin wall of blood capillaries
small surface area of alveoli
Moist wall of alveoli
Dense netword of blood capillaries
What is the name of the compound found in the red blood cells
Oxyhaemoglobin
Haemoglobin
Hormones
Enzymes