-The number of B cells producing the antibody is proportional to the concentration of that antibody.
-On day 16, one out of 100000 B cells are specific for antigen A
\frac{1}{100000} = 1 x 10⁻⁵ B cells
- on day 16, Antibody concentration is 2 × 10¹= 20 Antibodies
- on day 36, antibody concentration 8 × 10³.= 8000
20 antibodies ------------ 1 x 10⁻⁵ B cells
8000 antibodies--------------x
x= (8000 x 1 x 10⁻⁵)/ 20
x= 4x10⁻³ or 1 in 250 are <span>B cells specific for antigen A</span>
The oceanic crust is denser than the continental crust.
Also, the oceanic crust consists mostly of basalt.
What is the oceanic crust made of?
The topmost layer of the tectonic plates' oceanic part is called the oceanic crust. It is made up of two oceanic crusts: the upper crust, which contains pillow lavas, and the bottom crust, which is made up of troctolite, and ultramafic cumulates. The crust sits on top of the hard mantle's topmost layer.
Dark-colored rocks named basalt and gabbro make up the majority of the marine crust. It is lighter-colored rocks called andesite and granite that make up the continental crust, which is thinner and denser. Because of its low density, continental crust "floats" high above the viscous mantle, generating dry land. It develops as magma rises to fill the space between divergent tectonic plates and is consumed in subduction zones.
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Yes, if it is a worthwhile project, others might want it done as well. Therefore, promoting it on social media will get your earnings higher.
Answer:
The presence of DNA, RNA, and membrane components suggest that the cell was destroyed during the process of secretion. This is consistent with a holocrine type of secretion.
Explanation:
Holocrine is a term used to classify the mode of secretion in exocrine glands in the study of histology. Holocrine secretions are produced in the cytoplasm of the cell and released by the rupture of the plasma membrane, which destroys the cell and results in the secretion of the product into the lumen. Skin glands in mammals are classified into holocrine (e.g., sebaceous glands), and merocrine (e.g., sweat glands). The sub mandibular or chin gland of rabbits is a modified sweat gland (apocrine; Lyne et al., 1964) developed from the external root sheath of the hair follicle and attached to it
False, common examples of pathogens are pollen and animal hair.
An antigen called an allergen causes the immune system to react in an excessively ferocious way to a perceived threat that would otherwise be harmless to the body. Allergies are the term for such reactions.
Technically speaking, an allergen is an antigen that, when exposed to atopic persons, can trigger an immunoglobulin E (IgE) response, resulting in a type-I hypersensitivity reaction.
The majority of Immunoglobulin E responses in humans are only activated in response to parasite infections. Some people, however, may react to a variety of widespread environmental antigens. Atopy is the name given to this inherited tendency. Non-parasitic antigens in atopic people cause erroneous IgE production, which results in type I hypersensitivity.
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