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klemol [59]
2 years ago
9

How does the immune system function?

Biology
1 answer:
professor190 [17]2 years ago
3 0

Answer:

Immune system of the body helps in fighting with the infectious agents that are foreign for the body. So the immune system protects us from infection.

When any foreign substance(antigen) comes in the body B-lymphocyte recognize it by binding the antigen through its receptor. After recognizing the antigen, B cell divides into antibody-producing plasma cell and memory cell.

Antibodies produced by plasma cells help in destroying the antigen by getting the antigen recognized by phagocytic cells or by complement activation.

B cells are antigen-presenting cell which present antigen to T cell and then T cell activates and produce chemicals that kill the antigen. Therefore the immune system has many immune cells that activate when an antigen comes in the body. This is how the immune system functions.

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Your left wrist is what anatomical direction from your left elbow?
Norma-Jean [14]

Answer:

The correct answer will be- distal

Explanation:

In anatomy, the anatomist defined the standard position and movement of the bones of the skeletal system by universal anatomical terminologies.

The directional position of the bones of arms and legs is represented by the proximal and distal plane.

The proximal direction represents the bone closest to the point of origin or reference while distal represents the bone closest to the farthest away from the reference.  Since the left wrist is farther from the reference or the elbow therefore, it is considered distal to the elbow.

Thus, distal is the correct answer.

3 0
3 years ago
When a plant cell in normal water is moved into a 20% salt solution, the cytoplasm and vacuole of the plant cell shrink. the rea
son4ous [18]
The salt solution is hypertonic to the plant cells. water from the plant cells seeped out. plasmolysis apply
5 0
2 years ago
What is the make-up (structure) of the plasma membrane? what makes the plasma membrane selectively permeable? how are the phosph
devlian [24]
Lipid bilayer model was proposed for its structure but it was modified and new structure is according to fluid mosaic model. Plasma membrane is selectively permible as it selects small molecules like lipid etc (composition is also of lipid and as solubility principle like dissolve like) so large and charged molecules like plasma and ion can't pass through it. Lipid are in form of layer so at the chain when ever other phosphate group attach the place conjugate molecule (phospholipid ) formed
3 0
3 years ago
What represents the flow of energy in a food chain
ipn [44]
Arrows coming from one organism and pointing to another shows the flow of energy.

Plant------>Mouse

The mouse is getting energy from the plant.
6 0
2 years ago
After the rain of 12th june 2017 an ecologist measured a volume of 1414cm cube of rain water from a rain gauge wish a funnel dia
larisa [96]
Rainfall is measured as depth on the surface of the Earth, typically in mm. We know the volume of water in the rain gauge: 1414 cubic centimetres. We know need to know the area of the Earth that this volume fell on. This would be the area of the funnel opening that points up to the sky to catch the rain. We know the diameter is 24 cm. So we need to determine the area of a circle with a diameter of 24 cm. The equation to use is: area = pi * radius^2. Since the radius of a circle is half the diameter, the equation is:
So area is 3.14159 * 12^2
= 452.39 cm^2Volume = depth * areadepth = volume/areadepth = 1414/452.39= 3.13 cm = 31.3 mm
5 0
3 years ago
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