This decrease of pressure in the thoracic cavity relative to the environment makes the cavity pressure less than the atmospheric pressure. This pressure gradient between the atmosphere and the thoracic cavity allows air to rush into the lungs; inhalation occurs. The resulting increase in volume is largely attributed to an increase in alveolar space because the bronchioles and bronchi are stiff structures that do not change in size.
The atom is made of three subatomic particles.
protons, neutrons, and electrons. The protons and the neutrons make up the center of the atom called the nucleus and the electrons fly around above the nucleus in a small cloud.
Answer:
Explanation:
There are an estimated 200 million microvilli per square millimeter of small intestine, greatly expanding the surface area of the plasma membrane and thus greatly enhancing absorption.
Answer: Option (a) is the correct answer.
Explanation:
Conduction is defined as the process in which there is transfer of heat through the material of substance due to the difference in temperature of adjoining regions.
For example, cooking omelet in a pan is a conduction process.
Thus, we can conclude that out of the given options conduction is the process which describes the transfer of heat through matter by molecular activity.
