The responses observed in type IV hypersensitivities result from the action of T cells and phagocytes.
Hypersensitivity IV type, also called delayed-type hypersensitivity (DTH), involves T cell-antigen interactions that cause activation and secretion of cytokines. This type of hypersensitivity requires sensitized lymphocytes that respond 24–48 hours after exposure to soluble antigens. A type IV hypersensitivity reaction is a cell-mediated reaction that can occur in response to contact with certain allergens, resulting in what is called contact dermatitis, or in response to certain diagnostic procedures such as the tuberculin skin test. Certain allergens need to be avoided to treat this condition. Type IV hypersensitivity response is observed results from the action of T cells and macrophages while other types are mediated by antibodies. This reaction occurs at least 1–3 days after the initial exposure. Type IV hypersensitivity is the mechanism of many autoimmune disorders.
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B): Energy is radiated more than absorbed near the poles
D): Energy is absorbed more than radiated near the equator.
E): Energy is carried from the equator to poles in surface currents.
Explanation:
Thermal energy is a form of energy carried by heat as a result of temperature differences between two places or bodies.
At the equator the sun is overhead and directly bursting energy from space. Areas around the equator have very low albedo because the bulk of radiation is absorbed. The surfaces here are like black bodies.
At the poles, the ice caps and bodies causes the reflection of the bulk of these radiations. Such regions have a very high albedo. Most of the energy here is radiated.
- Warm water in the equator due to absorbed energy are rises to the surface and are carried away to the pole.
- Colder water moved from the pole towards the equator by deep ocean currents.
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C. The digestive system breaks down food and the circulatory system transports the nutrients throughout the body.
The Digestive system is the system that helps the body digest food. It consists of the following organs: liver, stomach, gallbladder, large and small intestines, pancreas, rectum, and esophagus.
The Circulary system is the system that pumps blood through body. The blood contains all the nutrients and minerals the body needs. The system consists of the following organs: heart, blood vessels, blood, lymph, lymphatic vessels, and glands.
Answer:
this tree tells us that the amnion is found in mammals, lizards, snakes, crocodiles, and birds
Explanation:
