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NEET MDS Shorts

96719
General Medicine

The sex chromatin body, also known as the Barr body, is an inactivated X chromosome found in female cells. To study the presence of Barr bodies, buccal mucosa cells are often used because they are easily accessible and can be collected non-invasively through a simple scraping of the inner cheek. Buccal epithelial cells are large and contain sufficient cytoplasm, making them suitable for microscopic examination. In contrast, blood cells (like lymphocytes) can also be used, but the collection process is more invasive and less convenient than obtaining buccal mucosa cells.

85462
Oral Surgery

Each of the following statements about local anaesthesia is correct except: Prilocaine is more toxic than lignocaine.

18819
Pharmacology

Anticholinergic side effect of antidepressant leads to dry mouth in the patients on these drugs.

Dry mouth is due to the Muscarinic acetylcholine receptor antagonism of these drugs.

55203
General Medicine

Typical CSF findings in bacterial meningitis:

Cell count: Predominantly neutrophils (polymorphonuclear leukocytes)

Protein: Elevated (due to increased permeability of blood-brain barrier and breakdown products)

Glucose: Decreased (bacteria consume glucose + impaired transport across inflamed meninges)

Appearance: Turbid or purulent (due to high WBC count)

98787
State PSC PYQ

According to the inverse square law, intensity ? 1/(distance˛). Doubling the distance decreases the intensity to 1/4 of the original value.

20911
Oral Pathology

Target cells (codocytes) are characteristic of thalassemia and appear as cells with a central dark area, clear ring, and outer dark rim resembling a target. Safety pin cells are also seen in thalassemia due to the abnormal hemoglobin distribution. Note that Cooleys anemia (option 4) is actually the same as thalassemia major, so both options 1 and 4 are technically correct, but thalassemia is the more general and preferred answer.

49144
INI CET

Alginate filler is derived from seaweed, specifically from brown algae. It is commonly used in dental impressions due to its ability to capture fine details.

13403
Prosthodontics

Explanation: The Zest anchor is a type of precision attachment used in dental 
prosthetics that provides a secure connection between the prosthesis and the 
remaining tooth structure. It utilizes a female component cemented into the root 
and a male component that fits into it, allowing for a stable and retentive 
connection. The other options do not describe this specific mechanism.<br />

74280
General Medicine

Pulsus alternans is characterized by alternating strong and weak heartbeats and is often associated with severe heart conditions, including mitral incompetence. It indicates significant cardiac dysfunction.

Signs of Pulsus Alternans

  1. Alternating Pulse Amplitude:

    • The most defining characteristic of pulsus alternans is the alternating pattern of pulse strength. When palpating the radial pulse, a healthcare provider will notice that one beat is strong (high amplitude) and the next is weak (low amplitude).

  2. Irregular Pulse Rhythm:

    • While the rhythm may appear regular, the variation in amplitude can create an irregular sensation when palpating the pulse.

  3. Blood Pressure Variability:

    • Blood pressure readings may also show variability, with alternating high and low readings corresponding to the strong and weak beats.

  4. Heart Sounds:

    • On auscultation, the heart sounds may also reflect this alternation, with variations in the intensity of the heart sounds corresponding to the pulse amplitude.

Symptoms Associated with Pulsus Alternans

Pulsus alternans itself is a sign rather than a symptom, but it is often associated with symptoms of underlying cardiac dysfunction, including:

  1. Shortness of Breath (Dyspnea):

  2. Fatigue:

  3. Palpitations:

    • Patients may report feeling their heart racing or irregular heartbeats, which can be distressing.

  4. Edema:

    • Swelling in the legs, ankles, or abdomen may occur due to fluid retention associated with heart failure.

  5. Chest Pain or Discomfort:

    • Some patients may experience chest pain or discomfort, particularly if there is underlying ischemic heart disease.

  6. Cough:

    • A persistent cough, especially when lying down, may occur due to pulmonary congestion.

  7. Dizziness or Lightheadedness:

    • Patients may feel dizzy or lightheaded, particularly when standing up (orthostatic hypotension) due to fluctuating blood pressure.

36762
Oral Pathology

The function of the facial nerve is best tested by whistling.

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