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Fed [463]
4 years ago
13

Explain how an immune response starts after a macrophage attacks a pathogen

Biology
1 answer:
erastova [34]4 years ago
6 0
After the macrophage fails the Helper T Cell stimulates the B cells (create antibodies) if pathogen is extracellular and Cytotoxic T Cells (killer T cells, release perforin) if pathogen is intracellular. Once the pathogen is killed the B Cells create Memory B Cells and the Killer T Cells create memory T Cells. 

Hopefully I helped answer your question :)
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What species originally eliminated the wolves in yellowstone so that they had to be reintroduced?.
bezimeni [28]

Humans were the species that originally eliminated the wolves in Yellowstone so that they had to be reintroduced.

I was in the year 1800 that an expansion in an area caused native predators and preys to come close the the domestic livestock. The wolves, being predators, began to feed on the domestic livestock due to its abundance and closeness.

To stop the wolves from feeding om domestic livestock, it were the humans who became the reason for wolves being eliminated. The people in those times were unaware of the natural understanding of ecosystems and hence considered wolves to be a threat.

It was in the 1970's that national awareness was made to protect endangered species. Hence, an effort was the made to reintroduce the wolves into Yellowstone.

To learn more about wolves, click here:

brainly.com/question/25958333

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7 0
2 years ago
Macrophages and neutrophils express several enzymes that are involved in biochemical mechanisms that kill ingested microbes. Whi
Gwar [14]

Answer:

<h2>B. Granzyme B</h2>

Explanation:

Granzyme B is a type of serine protease that is present in granules cells such as cytotoxic T cells and natural killer cells. This enzyme plays an important role in the process of mediate apoptosis.  

      Neutrophils are a type of white blood cell that plays an important role in immunity. These cells produce many enzymes such as Myeloperoxidase, Lysozyme, Hydrolases and some other.

3 0
3 years ago
What is meant by the term "density"? Please provide an example of how
WARRIOR [948]

Answer:

1) density "the degree of compactness of a substance."

2) air masses "More dense, or “heavier” air will slow down objects moving through it more because the object has to, in effect, shove aside more or heavier molecules. Such air resistance is called “drag,” which increases with air density."

Explanation:

BRAINLIEST? plz

7 0
3 years ago
The water on the Earth today has been sustaining life for millions of years. Please select the best answer from the choices prov
amm1812

The answer is that it is True. It is true because the earth has been around for millions of years, and water has been around for just as long. hope this answer helps!

5 0
4 years ago
Read 2 more answers
How long does it take to become a registered nurse after high school
patriot [66]

Answer: About 16 months to 4 years.

Explanation: Depending on the specific nursing program you enroll in. On average, becoming a registered nurse can take 3 years.

6 0
3 years ago
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