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Leto [7]
2 years ago
6

GIBING BRAINLIEST, PLEASE ANSWER FOR 40 PTS, DUE IN 30 MINUTES 4 STEM CLASS!!!

Biology
2 answers:
melamori03 [73]2 years ago
8 0

Answer:

Sorry kid my middle school day re long gone but ummm... don't do drugs

:)

Explanation:

ANEK [815]2 years ago
6 0
Did you get it done already?
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Evidence with individual characteristics can lead to a determination of common origin (single source). Which type of evidence CA
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Answer is B. Single-layer paints

Explanation:

All the options mentioned are used by forensic experts to detect or have evidence about a person that committed a crime that is being investigated.

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If you were 16 years old on earth how old would you be on a planet that took 450 earth days to rotate around the sun.
tigry1 [53]

It's About 13 I just took the test and got it right

4 0
3 years ago
Explain the interaction that occurs between a t-helper lymphocyte and a b cell when the b cell is being induced to produce peanu
Paraphin [41]

Answer:

           According to Dr. Ray Schiling (member of the American Academy of Anti-aging medicine) about 1.5 million people suffer from peanut allergies. The seeds of peanut (<em>Arachis hypogea</em>) contain an array of allergens that can induce the production of IgE specific antibodies predisposed individuals. Ara1 and Ara2 are most common seed storage protein that cause allergy. Other allergen proteins such as Ara3 to Ara 17 have also been identified that cause allergy.  


Entry of peanut allergen into body

When peanut allergens enter the body of an individuals it leads to development of different symptoms like itchy skin, tingling sensation, nausea, runny nose and anaphylaxis.  

Allergic response

There are two subsets of T-cells Th1 and Th2. Both invoke different response to allergens. Th1 direct a non-allergic response while Th2 direct allergic response ranging from releasing of histamine to anaphylactic response. The presence of IL-12 cytokines direct a Th1 based, nonspecific response.  


Mechanism of allergic response (interaction between helper T cell and B cell)

Step 1.  

           When allergen enter to body they are encountered by B cells. Immunoglobulin receptors on the surface of B cells recognize antigen (Peanut allergens) and get attached, which are then internalized and processed. Within B cells the fragments of antigens combine with HLA class 2 proteins.  

Step 2

             HLA class 2 with antigen fragments (peanut allergens) then display on the surface of B cells.

Step 3

            Receptors on the surface of helper T cells recognizes the complex of HLA class 2 and antigen fragments (peanut allergen) and is activated to produce cytokines, which activate the B cells.  

Step 4

             B cell is activated by cytokines and begins clonal expansion. Some of the progeny become anti-body producing plasma cells while other become memory B cells.  


7 0
3 years ago
Hormones are _____. see concept 45.1 (page 998) signals that must interact with dna in order to be effective always proteins pro
DENIUS [597]
<span><span>The answer is ‘transported in blood or hemolymph are all under the control of the pituitary gland’. The pituitary is the master gland because it controls functions of other endocrine glands that produce different hormones.</span> <span>Hormones allow communication between organs and tissues for physiological regulation and behavioral activities, such as digestion, metabolism, respiration, and tissue function. </span></span>




4 0
3 years ago
From which part of the alimentary canal!<br>is this cross section taken​
MAXImum [283]

Answer:

I believe this is a traverse cross section of the gut.

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6 0
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