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NEET MDS Quiz - Practice Test
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Pathology - 3 Questions

1
Pathology

The first vascular reaction In Inflammation is:
1. Vasoconstriction
2. Vasodilation
3. Increased vascular permeability
4. Marginisation or pavementing

📝 Explanation:

The first vascular reaction in inflammation is Vasodilation.

Explanation:

Inflammation is the body's protective response to tissue injury or infection. It is characterized by the classical signs of redness (rubor), heat (calor), swelling (tumor), pain (dolor), and loss of function (functio laesa). The initial vascular changes in the inflammatory process include:

1. Vasoconstriction: This is a temporary response that occurs immediately after injury to minimize blood loss. However, it is quickly followed by the more significant and prolonged phase of vasodilation.

2. Vasodilation: This is the first major vascular reaction in the inflammatory response. Vasodilation occurs due to the release of substances such as histamine, bradykinins, and prostaglandins from the damaged tissue cells and mast cells. These substances are known as vasodilators and they cause the smooth muscles surrounding the blood vessels to relax, leading to an increase in the diameter of the blood vessels. This results in increased blood flow to the injured area, which is essential for delivering white blood cells, nutrients, and oxygen to the site of inflammation. The increased blood flow is what causes the characteristic redness and heat of an inflamed area.

3. Increased vascular permeability: Although it is not the first vascular reaction, increased vascular permeability is a critical component of the inflammatory process. After vasodilation, the endothelial cells that line the blood vessels become more permeable, allowing plasma and proteins to leak out of the vessels into the surrounding tissue. This leads to the formation of an exudate, which is the accumulation of fluid and proteins that makes up the swelling (edema) seen in inflammation.

4. Marginisation or Pavementing: This is the process where neutrophils (a type of white blood cell) move along the walls of blood vessels towards the site of inflammation. It occurs later in the inflammatory response after the initial vasodilation and increased vascular permeability. These cells then migrate through the vessel walls into the tissue to combat pathogens and debris.

2
Pathology

The migration of leukocytes from intravascular to extra vascular compartment occurs through:
1). Desmosomic destruction
2). Enlargement of interendothelial Junctions
3). Endothelial pores
4). Transmembrane proteins

📝 Explanation:

Enlargement of interendothelial junctions: This option refers to the widening of the spaces between endothelial cells, which can occur during inflammation. This enlargement allows leukocytes to pass through the endothelium more easily. This is a significant mechanism in the process of leukocyte transmigration.

3
Pathology
Apoptosis is suggestive of?
1. liquifaction degeneration
2 coagulation necrosis
3 neo angiogenesis
4 eithelial dysplasia

📝 Explanation:

Cells die by one of two mechanisms necrosis or apoptosis Two physiologically different processes Necrosis death by injury Apoptosis death by suicide Appoptosis: Disintegration of cells into membrane-bound particles that are then eliminated by phagocytosis or by shedding.

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