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How different are the actions of antibodies against bacteria and against virus? Why is the cellular immune response activated in case of chronic viral infection?
The antibodies of the humoral immune system act against extracellular agents, such as toxins or bacteria, but they are not active in the intracellular space and they cannot fight virus efficiently.
In case of viral infection (and also of cancerous or precancerous cells) the immune attack is made by the cellular immune system, mediated by T and NK (natural killers) lymphocytes that destroy exact cells and virus.
Stomata can open and close in response to changes in the CO 2 concentration inside the leaf. Would you expect stomata to open or close if the CO 2 concentration decreased? Explai
Eukaryotic cells have nucleus delimited by two juxtaposed membranes that start with the membrane of the endoplasmic reticulum. The nuclear membrane, or karyotheca, represents pores
Q. What are the environmental harms caused by mercury pollution? What are the main sources of mercury pollution? The Mercury is a metal that when present in the water of rivers
Define about the Yeast - Saccharomyces? Classification Kingdom - Mycetae Division - Amastigomycota Class - Ascomycetes Order - Endomycetales Family - Saccharomyc
Connect point A and D by line which is convex to the left. The left border is formed by the left ventricle except at its upper end which is formed by the left auricle where there i
Explain brownian movement When you view a sol through an ultra microscope, you will observe that colloidal particles appear to be in a state of rapid and irregular motion calle
Q. What is the destination of the branchial clefts in humans? In humans the branchial clefts located in the anterior region of the pharynx also known as pharyngeal clefts are p
B a b e s i o s i s It is also known as red water disease or cattle tick fever and is characterized by fever, intravascular haemolysis, acute anaemia and haemoglobinur
what is the excreatory organ of silverfish?
Reaction of the futile cycle:- A) An adequate level of cAMP stimulates formation of the inactive 'D' form of glycogen synthase and the active form of phosphorylase. Thu
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