What are characteristics of thalassaemia? or What do you know about Thalassemia?
It is characterized by the presence of microcytes by splenomegaly (enlargement of spleen) and by changes in the bones and skin. This disease is more common in children especially of Mediterranean parents. The blood of these patients is to be replaced regularly, with normal blood. How thalassaemia is cured? transplant which is very expensive – and does not give 100% cure rate.
What is oedema? Also name its types.
Oedema is the presence of excess fluid in the tissues of the body. there are two types of oedema i.e., intracellular and extracellular oedema.
What is location of human heart?
The heart of man is located in the chest cavity, between two lungs.
What is pericardial cavity?
The heart is enclosed in a double membranous sac the pericardial cavity. Pericardial cavity is a part of body cavity and is between parietal and visceral lining of mesoderm.
What is antiserum? or Define antiserum.
Antiserum is a serum containing antibodies.
What is immunity? Give its types.
The capacity to recognize the intrusion of any material foreign to the body and to mobilize cells and cell products to help remove the particular sort of foreign material with greater speed and effectiveness is called immunity. It has two types: Active immunity which is obtained by the use of vaccines. Passive immunity obtained when antibodies are injected in the form of antisera.
What do you know about vein?
Veins are the blood vessels which transport blood from body cells towards heart. They have larger lumen and thinner walls as compared to arteries.
How do humidity and vapour pressure affect rate of transpiration.
When air is dry the rate of diffusion of water molecules, from the surfaces of mesophyll cell, air spaces, and through stomata to outside the leaf, increases. So more water is lost, increasing the rate of transpiration. In humid air the rate of diffusion is much reduced. This decreases the rate of transpiration significantly.
What is the role of capillaries in blood circulation and transportation.
The capillaries are sites where exchange of materials i.e., gases, digested food, hormones etc., between blood and body tissue takes place.
What is the significance of lymph nodes?
Lymph nodes are lymphoid masses present in the neck region, axilla and groin of humans. They produce lymphocytes. Spleen and thymus, tonsils, i adenoids are also lymphoid masses.