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3 years ago

When the body is invaded by antigens, the immune system forms substances called?

1 answer:

4 0

<span>Antibodies. A. k.a. immunoglobulins. They are produced by a group of white blood cells called B lymphocytes (or B cells). There are 5 classes of immunoglobulins; IgM,IgA,IgE,IgG and IgD.The classes of antibody diifferent both in their constant region and in their activity.IgG, the most common antibody, and is found mostly in the blood and tissue fluids, and IgA is localized in the mucous membranes which line the respiratory and gastrointestinal tracts.</span>

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Which of the following statements is true?

mr Goodwill [35]

Answer:

Spongy bone is well adapted to accept stress in many directions, which makes it good for shock absorption

Explanation:

Spongy bone tissue is less compact and always present towards the interior of the bone and is covered by compact bone. Spongy bone tissue has lamellae that are arranged in an irregular pattern. The thin irregular columns of lamellae are called trabeculae.

The trabeculae of spongy bone tissues are precisely arranged along the line of stress. This feature of spongy bones allows them to resist the stress applied from many directions and to transfer the force making them a good shock absorber. The final arrangement of trabeculae is achieved only after the person learns the locomotory movements completely.

4 0

3 years ago

Question 1 6 pts

balu736 [363]

uestion 1 6 pts

In a lab report, the hypothesis should be in the "method" section.

True

False

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Question 2 6 pts

In a lab report, the background information / research should only be one sentence.

True

False

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Question 3 6 pts

In a lab report, the "materials" section is a bulleted list of the materials used.

True

False

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Question 4 6 pts

In a lab report, the "statement of purpose" is in the "introduction" section.

True

False

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Question 5 6 pts

In a lab report, a discussion of the results should be in the "results" section.

True

False

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Question 6 6 pts

In a lab report, any errors made should be mentioned in the "discussion" section.

True

False

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Question 7 6 pts

In a lab report, a numbered, step-by-step set of instructions for performing the experiment should be in the "discussion" section.

True

False

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Question 8 6 pts

In diffusion, solute moves from an area of high concentration to an area of low concentration.

True

False

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Question 9 6 pts

In osmosis, the solvent moves.

True

False

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Question 10 6 pts

One of the products produced in photosynthesis is glucose.

True

False

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Question 11 6 pts

The order of mitosis is: interphase, prophase, anaphase, telophase, metaphase.

True

False

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Question 12 7 pts

Human cells have 17 chromosomes.

True

False

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Question 13 7 pts

Meiosis is involved in the production of gametes.

True

False

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Question 14 7 pts

Plant cells have a cell wall.

True

False

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Question 15 7 pts

ATP is produced in the mitochondria.

True

False

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Question 16 6 pts

In the process of cellular respiration, ATP is produced

True

False

8 0

3 years ago

Sodium has the atomic number 11. How many electrons are in a sodium ion,

AleksandrR [38]

The number of electrons is 10

5 0

3 years ago

Eli is making a diagram to compare plant-like protists and fungus-like protists. Which belongs in the area labeled Y? are decomp

QveST [7]

Answer:

The correct option is a decomposers

Explanation:

Decomposers can be described as organisms which feed on dead and decaying material. These organisms break down molecules and use them as a source of food. Among the options mentioned, the option of decomposers is the only one which is applicable to fungus like protists and is unique to it. On the other hand, Plant like protists make their own food by the process of photosynthesis. Hence, option A is correct.

3 0

3 years ago

Animals cannot produce enzymes to digest cellulose, yet many termite species consume cellulose from plant material as a main par

Aliun [14]

The correct answer is mutualistic bacteria in the hindgut of the termite digest the cellulose into sugars.
<span>
Termites depend upon the whole complex of microbes in their hindgut. Microbes inside the termites help the breakage of the complex sugars like a cellulose into short-chain fatty acids.</span>

7 0

3 years ago