science teachers association

Associated with the sieve tube is a small cell containing dense cytoplasm and a large elongated nucleu..

Electrons revolve around the nucleus in different energy levels or shells and each shell is associated with definite energ..

Apart from the lungs, there are several associated organs and structures which together form the respiratory system. The respiratory system is closely linked with the circulatory system as the transport of the gases takes place through bloo..

It is the potential energy associated with water. For example, water at a height has more water potential and will, therefore, flow down. When water is present in a dilute solution it has higher potential and will therefore move towards the concentrated soluti..

The physical movements associated with the gaseous exchange are called breathing. They are controlled by the respiratory centre of the medulla oblongata in the human brain. Thus, the breathing movements are involuntary to a large extent. However, we can control the rate of breathing and ..

Liver is the largest gland and is found in the upper part of the abdomen on the right side of the body just below the diaphragm. Its secretion is called bile juice. It is alkaline and rich in organic salts called the bile salts. The alkaline nature serves to neutralize the acidic pH of the gastric..

It is the largest part of the brain and is made up of two hemispheres called the cerebral hemispheres. The two hemispheres are joined together by a thick band of fibres called the corpus callosum . The cerebrum is made up of four distinct lobes - frontal, parietal, temporal and occipetal. The out..

Chemical Properties of Carbon Compounds - Most of the carbon-containing compounds associated with hydrogen i.e., hydrocarbons are fuels that produce heat on burning. Petroleum products like natural gas, petrol, diesel, kerosene, heavy oils etc., and in a larger sense, wood, biogas, charco..

Question: Afferent nerves are also called the _______________. 1. motor nerves 2. sensory nerves 3. mixed nerves 4. association nerves Answer: ..

The male reproductive system comprises of the following: a pair of testes , organs that produce the male gametes i.e., sperms a network of tubules and tubes for passage of the sperms called the duct system associated glands a mating organ called the penis ..