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9966 [12]
3 years ago
7

The first cells activated by the antigens are called ?

Biology
1 answer:
juin [17]3 years ago
8 0

Answer:

Effector B- cells.

Explanation:

These are also known as plasma B cells- and are pretty much the cells that secrete antibodies against the antigen in question. They also, through a cascade of events, produce activated T-cells (T-helper and T-cytotoxic cells). The latter cells organize cell-mediated immune response against the antigen.

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Apply: Where in the Gizmo (and in real life) do the following energy conversions occur?
Fudgin [204]

Answer:

26. Coal is burned at a power plant

27. In dams.

28. Gas heater.

29. Nuclear power plant.

Explanation:

Coal is burned at a power plant where Chemical energy is converted into thermal and then into electrical current. In dams, water falls from higher altitude in which Gravitational potential is converted to kinetic energy by revolving of turbines which produces electrical  current. in heater, electrical energy is converted into radiant and also heat or thermal energy while the nuclear thermal energy is converted into electrical energy and this happen in the nuclear power plant.

4 0
3 years ago
Much of the autonomic innervation of the gastrointestinal system is parasympathetic. You would expect the preganglioninc neurons
IceJOKER [234]

Answer:

Explanation:innervate the targeted end effector (i.e., gland, smooth muscle,

4 0
3 years ago
Which term best describes an enzyme<br> A.substrate<br> B.reactant<br> C.catalyst<br> D.product
alexgriva [62]
The answer is C:  Catalyst
4 0
3 years ago
Explain how changes in Earth’s systems affect the growth of life on Earth. Use evidence from the text to support your answer.
andre [41]

Answer:

The earth system usually refers to the different ways in which various physical, chemical as well as the biological processes interacts with one another and it includes the land areas, oceans, atmosphere, minerals and also the different cycles such as carbon, nitrogen, sulfur and so on.

These processes are continuously taking place at, on and below the surface of the earth, maintaining an equilibrium. The life existing on earth is directly dependent on these conditions and on-going processes. When there occurs changes in these conditions, then the lives on earth are affected.

For example, the lives are dependent on the climatic conditions, and when suppose the concentration of green house gases and other toxic elements are increased in an ecosystem, then the temperature will eventually rise, and there reaches a point when it becomes difficult for life to sustain. The organisms will suffer from different diseases.

Thus, the growth of life on earth affects when there occurs changes in the earth's system.

8 0
2 years ago
The weight of a substance is defined as its mass divided by its volume.
crimeas [40]
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3 0
3 years ago
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