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Ksju [112]
3 years ago
14

What acts as alarm signals to activate the body 's immune system by stimulating helper t-cells​

Medicine
1 answer:
solong [7]3 years ago
7 0

Answer:

Helper T cells are arguably the most important cells in adaptive immunity, as they are required for almost all adaptive immune responses. They not only help activate B cells to secrete antibodies and macrophages to destroy ingested microbes, but they also help activate cytotoxic T cells to kill infected target cells. As dramatically demonstrated in AIDS patients, without helper T cells we cannot defend ourselves even against many microbes that are normally harmless.

Helper T cells themselves, however, can only function when activated to become effector cells. They are activated on the surface of antigen-presenting cells, which mature during the innate immune responses triggered by an infection. The innate responses also dictate what kind of effector cell a helper T cell will develop into and thereby determine the nature of the adaptive immune response elicited.

In this final section, we discuss the multiple signals that help activate a T cell and how a helper T cell, once activated to become an effector cell, helps activate other cells. We also consider how innate immune responses determine the nature of adaptive responses by stimulating helper T cells to differentiate into either TH1 or TH2 effector cells.

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The normal pattern of venous and lymphatic drainage of the superficial tissues of the anterior abdominal wall is arranged around
alexgriva [62]

Answer:

E. Level of umbilicus

Explanation:

Level of umbilicus

The umbilicus region is a major area for the lymphatic and venous drainage of the wall of the abdominal region .

In the above region of the umbilicus , the The venous blood drains into the superiors epigastric vein and the lymphatics drain into the axillary lymph nodes .

In the region below the umbilicus , the while the venous venous blood drains into the inferior epigastric vein and the external iliac vein and the lymphatics drains into the superficial inguinal lymph nodes .

6 0
3 years ago
In the majority of adults with acute concussion, how many days does it take for signs and symptoms to resolve
faust18 [17]

Answer:

Explanation:

Headache is the most common symptom. Most symptoms resolve within 14 to 21 days. Although recovery plans are unique to each person, all involve mental and physical rest and a gradual return to activity

7 0
2 years ago
Brain-imaging techniques can determine all of the following EXCEPT :
pantera1 [17]

Answer:

The answer is letter c, The structure of individual neurons.

Explanation:

Brain-imaging technique- <u><em>this comprises of different techniques for analyzing the brain's activities as well as structure, function and other problems.</em></u>

There are many brain-imaging techniques such as <u>Positron Emission Tomography or PET,</u> which traces the part of the brain that is activated during specific tasks as well as the localization of brain activity in response to a specific stimulus. These areas are seen with high radioactivity.

Patterns of blood flow in the brain can be detected by using <u>MRI (Magnetic Resonance Imaging) test.</u> There is an increase in blood flow to areas in the brain with high activity level.

With the explanation given, it shows that letter c is the only choice that the brain-imaging techniques cannot determine.

7 0
3 years ago
Thomas was told that the tumor in his brain is benign. it means that the tumor is:____.
Tems11 [23]

Answer:

noncancerous

Explanation:

that it is not cancer

3 0
2 years ago
How to prevent gallstone from forming? 250 words answer. thank you.
Kipish [7]

Answer:

Being over weight, particularly being obese, increases the amount of cholesterol in your bile, which increases your risk of developing gallstones. You should control your weight by eating a healthy diet and taking plenty of regular exercise. But you should avoid low-calorie, rapid weight loss diet.

7 0
3 years ago
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