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xz_007 [3.2K]
3 years ago
8

Identify the three stages of immunity.

Biology
1 answer:
kompoz [17]3 years ago
7 0
<span>The Immune System has 3 Lines of Defense Against Foreign Pathogens:
</span><span>Physical and chemical barriers form the first line of defense when the body is invaded.
</span>
1. Physical and Chemical Barriers (Innate Immunity)
<span>2. Nonspecific Resistance (Innate Immunity)
</span><span>3. Specific Resistance (Acquired Immunity)
</span><span>Physical Barriers
</span><span>The skin has thick layer of dead cells in the epidermis which provides a physical barrier. Periodic shedding of the epidermis removes microbes.   
</span><span>Chemical Barriers
</span><span>Lysozyme, an enzyme produced in tears, perspiration, and saliva can break down cell walls and thus acts as an antibiotic (kills bacteria)
</span><span>
Nonspecific Resistance (Innate Immunity)
</span>
The second line of defense is nonspecific resistance<span> that destroys invaders in a generalized way without targeting specific individuals:
</span><span>Specific Resistance (Acquired Immunity)
</span>The third line of defense is specific resistance<span>. This system relies on </span>antigens, which are specific substances found in foreign microbes.<span>







</span>
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Answer:

A. Mid ocean ridge

Explanation:

A divergent plate boundary often forms a mountain chain known as a ridge. This feature forms as magma escapes into the space between the spreading tectonic plates.

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How does heart failure affect the lungs? A. Blood leaves the lungs. B.Fluid can build up in the lungs. C.Carbon dioxide enters t
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Explanation:

A&D

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As the size of a cell increases
Hoochie [10]

Answer:

The correct answers are-

a. Its metabolic demands increase.

b. It's surface area-to-volume ratio decreases.

c. Its ability to transport enough nutrients in and transport wastes out to meet cellular metabolic demands decreases.

Explanation:

As the size of a cell increases the surface area to volume ratio decrease. So a big cell has less surface area and small volume. Therefore surface area for transfer of metabolic substance per unit volume decreases so the cell's ability to transport enough nutrients in and transport wastes out to meet cellular metabolic demands also decreases.

But due to an increase in the volume of the cell the metabolic demand of cell increases because a larger cell requires more nutrients than a smaller cell to survive which can not be fulfilled efficiently due to less surface-area-to-volume ratio.

Therefore the correct answer is a, b, and c.

3 0
4 years ago
Please HELP me i cant fail this class What are the two forces of gravity that contribute to tectonic plate movement at mid-ocean
iragen [17]

Answer:

"Plate movement is thought to be driven by a combination of the motion of the seafloor away from the spreading ridge (due to variations in topography and density of the crust, which result in differences in gravitational forces) and drag, with downward suction, at the subduction zones."

Explanation:

Does this help?

5 0
3 years ago
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2. How might you model the relationship between a tomato plant and the hornworm caterpillar?
Korvikt [17]

Answer:

Parasitism is the relationship between tomato plant and hornworm.

Explanation:

The relationship between a tomato plant and the hornworm caterpillar is parasitism because parasitism is a type of symbiotic relationship in which one organism get benefits from other and the other get harmed. We know that hornworm caterpillar feed on leaves and destroy the tomato crop. So it gets nutrients from tomato plant and the tomato plant is destroyed. The input of this system is the vegetative part of tomato plant which can be eaten while the output is the conversion of hornworm caterpillar into a moth.

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