Answer:
I believe the answer to this question is Letter A: Evaporation
Snug but do not make it too tight because if it is very tight against the skin then blood circulation will decrease.
However, if the friend appears to be very injured, he/she might need to get examined by a professional
Answer:
Density and density-independent factors for populations. Density-independent variables including geography and atmosphere affect city size independently of population density. The effects of density-dependent factors are, however, steadily increasing as the population grows.
Explanation:
Density and density-independent factors for populations. Density-independent variables including geography and atmosphere affect city size independently of population density. The effects of density-dependent factors are, however, steadily increasing as the population grows.
Hope this helps.
CD4+ t cells are activated by interaction between CD4+ and MHC II.
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What is MHC molecule?</h3>
- Antigens are foreign proteins that enter the host body through an infection. Antigens are generally high molecular weight proteins or polysaccharides. Viruses and bacteria contain antigen on their surface or inside the body.
- Epitope is the molecular region on the surface of the antigen which interact with the antibody binding site on the antigen. Epitopes are capable of stimulating an immune response so, these are also known as antigenic determinants. Binding between the receptor and epitopes occurs when they both fit together like a puzzle, that event is necessary to activate B-cell production of antibodies.
- A sizable region of vertebrate DNA called the major histocompatibility complex houses a group of closely related polymorphic genes that code for the cell surface proteins needed by the adaptive immune system. These MHC molecules are cell surface proteins.
- A controlled, efficient immune response to pathogens depends on CD4+T cells. After interacting with the antigen-MHC complex, naive CD4+T cells become activated and undergo specialized subtype differentiation that is largely influenced by the cytokine milieu of the microenvironment.
- Hence the correct answer is interaction between CD4+ and MHC II.
To learn more about MHC molecule refer to:
brainly.com/question/13051585
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Answer:
It is important that he human trachea is reinforced with cartilaginous rings to keep the passage open as pressure keeps fluctuating during the process of breathing.
Explanation:
The trachea is reinforced with cartilaginous rings as it doesn't allow the trachea to collapse in our day to day lifestyle. It also keeps the air way passage open in spite of the continuous pressure changes during breathing.
The rings are not complete posteriorly to provide another advantage, that is it allows the esophagus to expand anteriorly ( inside the body) when we swallow food.