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Deffense [45]
3 years ago
7

Question 1(Multiple Choice Worth 2 points)(05.05 MC)How does the human immune system initially respond to a pathogen?

Biology
1 answer:
Rufina [12.5K]3 years ago
4 0

Immediately, the pathogen has been recognized:

Macrophages acts as the first line of defence by engulfing pathogens identified by antigens which will now present the antibody shape to a helper T cell.

The Helper T cells produce a signal to plasma and Memory B cells to yield antibodies that attach to the antigens. The cytotoxic cells that leads to cell death are activated by the helper T cells.

Antibodies helps to immobilize pathogen for macrophage to feed on.

if the pathogen comes back a 2nd time the memory cells helps in quick and efficient recovery by producing the specific B and T cells for the antigen.

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What is the term that maintain a constant internal environment?
adoni [48]

Answer:

Hey mate.....

Explanation:

This is ur answer.....

<em>Homeostasis is the maintenance of a stable internal environment. Homeostasis is a term coined to describe the physical and chemical parameters that an organism must maintain to allow proper functioning of its component cells, tissues, organs, and organ systems.</em>

Hope it helps!

Brainliest pls!

Follow me! ♧

6 0
3 years ago
Which group of microorganisms is most likely to spoil a freshwater trout preserved with salt? A) Psychrophiles B) Facultative ha
Naddika [18.5K]

The right option is; B. Facultative halophiles  

Facultative halophiles are the group of microorganisms that is most likely to spoil a freshwater trout preserved with salt because they can survive, grow and reproduce in extremely salty environments. Facultative halophiles can also survive and reproduce at not-high salt concentrations as they do not rely on high salt concentrations for growth. Examples of facultative halophiles are Staphylococcus aureus and Streptococcus spp.

3 0
3 years ago
You are observing two juvenile chimpanzees. When they first meet, they embrace. They then begin tickling each other and wrestlin
Bess [88]

Answer: Affiliative behavior

Explanation:

Affiliative behavior is the behavior in which social interaction is seen between two animals through cohesion, meeting, hugging, involvement with each other, playful acts etc. They try to display emotional and social bond between them.

According to the question, chimpanzees displaying embracing behavior , ticking and little wresting shows that they have social and emotional link with each other.

Thus, they have affiliative behavior rather than aggressive and anger-based behavior.

6 0
3 years ago
3. A direct-mail advertising campaign from a training facility based in Area C
Rina8888 [55]
The answer is A area c alone
7 0
3 years ago
Why do complex organisms need specialized cells?
Yuliya22 [10]
Because these complex multicellular organisms have many functions and are interdependent with other cells to survive. Also, because of mitosis the organism is able to grow and communicate with other surrounding cells forming a bigger and organized system of cells. 


A Eukaryotic cell contains a nucleus; more than one chromosome and is typically a multi-celled organism.  Both plant and animal cells are eukaryotic cells.
<span>The advantage is that eukaryotic cells have a nucleus which functions formally as to store the DNA of the cell which can translate into many functions such as cell division and work structure between cells that forms the hierarchial function to tissues. </span>
6 0
3 years ago
Read 2 more answers
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