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elena55 [62]
3 years ago
15

Mepolizumab and reslizumab improve asthma control by binding to

Biology
2 answers:
insens350 [35]3 years ago
8 0
<span>Both Mepolizumab and reslizumab bind to interleukin-5 (IL-5), a key cytokine responsible for the differentiation, maturation, and activation of human eosinophils. Both antibodies bind to IL-5 and prevents binding to the interleukin 5 receptor alpha subunit, on the surface of eosinophil white blood cells. When these antibodies bind to IL-5, they stimulates B cell growth and increases immunoglobulin secretion, and this reduces the survival of eosinophils. Eosinophils, along with basophils and mast cells, are important mediators of allergic responses and severe asthmas.</span>
kicyunya [14]3 years ago
3 0
Interleukin-5 (IL-5). IL-5 is responsible for the recruitment and maturation of eosinophil. Eosinophils on the other hand are majorly involved in the inflammatory response in asthma- characterised by narrowing of the airways. Mepolizumab and reslizumab are, therefore, anti-IL-5
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Reptiles do not live in the Arctic; however, some birds do live in the Arctic even though they evolved from reptiles. Offer an e
noname [10]
Evolution over time has allowed them to adjust to their surroundings. Birds can also survive on eating less/smaller things whereas reptiles usually have to eat more to survive. Also, birds eat a lot of plants while reptiles eat a lot of meat. 
3 0
3 years ago
Many bedbugs are highly resistant to insecticides, but the scientist’s bedbugs aren’t resistant. Explain why this happens based
Nutka1998 [239]

Wild Bedbugs become insecticide resistant because of the mutations and natural selections.

<h3><u>Explanation</u>:</h3>

As the huge amount of pesticides and insecticides are sprayed in the rooms for cleaning, the pests and insects like bedbugs dies in huge portions because of the toxin. But some of the bedbugs remain alive as they have mutations that help them to detoxify the toxins given, or bypass the metabolic processes so that the toxins don't hamper them much.

Now as the population becomes very small(bottle neck effect), the nature selects these organisms over the other to propagate more sufficiently and enormously. As the nutrients and supplies are also available, so the bedbugs don't suffer any lack of nutrition which can be a determining factor of their population.

Thus the wild bedbugs become resistant to insecticides while the experimental one remain succeptible to insecticides.

4 0
3 years ago
Which of the following is not a step of Natural Selection?
kati45 [8]

Answer:

im pretty sure it is underpopulation.

6 0
3 years ago
What happens to a population if the birth rates and death rates are equal?
polet [3.4K]

Answer:

Population size decreases

8 0
3 years ago
During what stage does land get ready for the arrival of a new species
34kurt

Answer

           The correct option is B.

Explanation

          Ecological succession of any species is composed of following stages:

A. Migration

            The movement of species from one place to another location for the purpose of setting permanently o temporary is known as migration . Forexample

             Siberian crane (<em>Leucogeranus leucogeranus</em>) that live in the arctic tundra of eastern and western Russia. The eastern population of birds migrate to china while western population of these birds migrate to Iran, India and Nepal during winter season.

B. Ecesis

         The complete establishment of species in new habitat that was completely barren or left barren due to some catastrophe is known as Ecesion. This process is dependent upon the climatic, edaphic and biotic factors. The success of plant depend upon some of the adaptations to withstand the unfavorable conditions which includes both biotic and abiotic conditions.

Forexample

               The process of succession in xerosphere start on barren area from pioneer stage covered by crustose lichen, then foliose lichen followed by moss stage, herbaceous stage and a last by shrub stage.

C. Nudation

       The initiation of new species by major environmental disturbance such as volcano eruption is known as Nudation.

D. Reaction

            It represents the effect of established species on the habitat. Forexample plants alter habitat condition as they grow. They extract raw materials from the environment in large amounts and return metabolic wastes. The waste accumulates in large amounts and differ from the original raw materials, thus altering the environment.  

E. Competition

             The phenomenon which involves struggle for existence between two or more individuals growing in same area, that make excessive demand that are similar in nature on the soil is known as competition.

Such struggle may be in between same species or different species. The competition may be interspecific or intraspecific. Because of completion the weak individuals are eliminated as strong ones are retained.

 


8 0
3 years ago
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