Які екологічні фактори діють на біологічну систему?
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Colchicine is a highly poisonous alkaloid, originally isolated from crocus. It is a very effective mitotic poison that attacks the microtubules of the spindle apparatus, thus disrupting the correct course of mitosis. Some drugs (such as some chemotherapies) work by a similar mechanism by damaging the function or structure of microtubules. Which particular process is so disrupted during mitosis?
A 19-year-old student comes to the eye clinic with a very common problem today. He suffers from cutting and burning eyes, the feeling of a foreign body in the eye, pressure, and the feeling of tired eyes. The eyes are red. He is diagnosed with dry eye syndrome. This can have many causes, and one of them is low tear production, for example, as a result of taking certain medications. Tears are produced by the lacrimal gland. The lacrimal gland is an exocrine gland. Its cells have a basophilic cytoplasm and a round nucleus located in the basal third of the cell. The basal part of the cells shows significant basophilia due to the accumulation of polyribosomes and granular endoplasmic reticulum for the production of proteins that are part of the produced secretion. The cells contain zymogen granules, which are mostly released in a merocrine manner. What type of gland is a lacrimal gland?
A 4-year-old boy has recently returned from a holiday abroad and has now arrived now at the Clinic of Infectious Diseases with his parents due to severe dehydration caused by diarrhoea. The causative bacterium is , which disrupts the structure of one type of intercellular junctions – tight junction = zonula occludens. This physiologically prevents the passage of fluid between cells – the so-called paracellular route. Disruption of these tight junctions results in fluid loss into the lumen of the gastrointestinal tract. Where can we find these tight junctions on cells?
За яку працю В. Німчук став лавреатом премії ім. Івана Франка?
Автором проєкту якого правопису був В. Німчук?
Коли було схвалено нову редакцію правопису?