স্পেশাল বিসিএস (স্বাস্থ্য)

VDRL is Non-Specific antibody tests for syphilis

Sigmoid colon is commonly affected by Hirschsprung disease

Explanation: Obesity is regarded as a pandemic, with potentially disastrous consequences for human health.

S. hematobium is found in urinary tract

Explanations:
Hb S, Hb C, Hb H, Hb Barts are abnormal Hb.

Reference: Davidson 23rd; P-638

Volume, which cannot be measured by spirometry, is the residual volume. Capacities, which include residual volume also cannot be measured. Capacities that include residual volume are functional residual capacity and total lung capacity.

Reference: Davidson 23rd; P-357

Scurvy
Vitamin C deciency affects the normal synthesis of collagen and results in a bleeding disorder characterised by perifollicular and petechial haemorrhage, bruising and subperiosteal bleeding. The key to diagnosis is the dietary history

Reference: Davidson 23rd; P-637

Due to volume and duration of right ventricular ejection remaining the same during inspiration and expiration, there is little inspiratory exaggeration of the splitting of S2 in ASD.

• Pseudomonas aeruginosa most commonly causes hospital-acquired infections

Explanation : C fibers (slow pain) are the smallest nerve fibers and therefore have the slowest conduction velocity.
Ref : BRS Physiology 7th edition (Table-2.5)

Ref: Robbins 9th p 332

Most common types of tertiary disease are gumma (benign granulomatous lesion), cardiovascular syphilis (ascending aorta aneurysm) & symptomatic neurosyphilis (tabes dorsalis and paresis).

Reference: Davidson 23rd; P-547

Vasopressin:
Cys-Tyr-Phe-Gln-Asn-Cys-Pro-Arg- GlyNH2
Oxytocin:
Cys-Tyr-Ile-Gln-Asn-Cys-Pro-Leu-GlyNH2 

Hyperkalaemia is a common finding in adrenal insufficiency due to decreased aldosterone secretion. Davidson explains that oestrogen normally promotes sodium reabsorption and potassium excretion in the kidneys. In Addison’s disease, low aldosterone levels lead to sodium loss and potassium retention. Harrison adds that adrenal insufficiency also leads to hyponatremia and volume depletion due to salt wasting.

Reference: Davidson 23rd; P-1088(Fig-25.19)

Explanation :
Mostly all autosomal recessive disorders are related to enzyme.

Receptors for Taste sensation (Taste bud) is chemoreceptors.

Reference: Davidson 23rd; P-868

Enzymatic fat necrosis occurs in pancreas

Prostatic utricle & appendix of testes are fates of Mullerian duct in male

-Follicular cells are columnar when stimulated
-Parafollicular cells are larger than follicular cells
-Parafollicular cells produce calcitonin, follicular cells produce T3,T4.

Explanation: Adenocarcinoma is the most common malignancy of the stomach, comprising more than 90% of all gastric cancers

Explanation: Gout is the most common inflammatory arthritis in men and in older women. It is caused by deposition of monosodium urate monohydrate crystals in and around synovial joints.

Acute cellular rejection is the most common form of graft rejection

Erythroblastosis fetalis-Hemolytic disease of newborn

Rickets, Fragile-X syndrome—X-linked dominant

[Ganong 24th p-638]

• It is produced during atrial systole and considered as physiologic heart sound.
Characteristics:
• It is short and low pitched sound.
• Duration of the sound is 0.02 -0.04 seconds.
Causes:
• It occurs due to vibrations which set up in atrial musculature during atrial systole.
Fourth heart sound and ECG:
• It coincides with interval between end of 'P' wave and onset of 'Q' wave in ECG.

Stress management (fight & flight response to face sudden emergency) by:
Ø  Gluconeogenesis that provides glucose to be used as fuel in neurons.
Ø  Proteolysis that provides amino acid to support gluconeogenesis and acute phase protein synthesis in liver.
Ø  Lipolysis that provides fatty acid to be used as fuel in peripheral tissues.
Ø  Maintenance of ECF volume and blood pressure.

* For these functions in relation to stress, cortisol is called emergency hormone

Stem Breakdown:

Epigastric pain, nausea, and vomiting: These are common symptoms of peptic ulcer disease (PUD).
Pain worsens after meals and improves with antacids: This suggests acid-related irritation, consistent with PUD. Antacids neutralise stomach acid, providing relief.
History of NSAID use: NSAIDs are a known risk factor for PUD because they inhibit prostaglandin synthesis, reducing the protective mucus layer in the stomach.
Option Analysis:

A) Peptic ulcer disease: This is the correct diagnosis. Davidson and Harrison explain that peptic ulcer disease is characterised by the formation of ulcers in the stomach or duodenum, often caused by NSAID use or Helicobacter pylori infection. NSAIDs disrupt the stomach’s protective mechanisms, leading to ulceration. Epigastric pain that worsens after eating and improves with antacids is typical of PUD.
B) Acute pancreatitis: Pancreatitis causes severe epigastric pain that radiates to the back, along with nausea and vomiting. The pain is typically worse after eating, but antacids do not relieve it. Pancreatitis is more often associated with elevated amylase and lipase levels.
C) Gallstones: Gallstones cause biliary colic, a sharp right upper quadrant pain that may radiate to the shoulder. The pain is not typically relieved by antacids, and gallstones are more common in women and those with risk factors like obesity and pregnancy.
D) Gastro-oesophageal reflux disease (GERD): GERD can cause epigastric pain and heartburn, but the pain is more likely to be retrosternal (behind the breastbone) and related to reflux of stomach acid into the oesophagus. GERD is associated with regurgitation and burning sensation rather than pain that improves with antacids.

Anterior pituitary is also known as the master gland because it regulates many other endocrine glands through its hormones.

Post necrotic following hepatitis is most common cause of cirrhosis of liver

Macrocytosis, i.e. an elevated MCV (>96fL) of which the causes can be seen in:
megaloblastic anaemia secondary to vitamin B12 and folic acid deficiency;
chronic alcoholism and/or alcoholic liver disease (most common causes of all causes of macrocytosis), pregnancy, hypothyroidism, reticulocytosis, aplastic anaemia, myelodysplastic syndromes and can also be caused by drugs that inhibit DNA synthesis (e.g. azathioprine);
an elevated MCV would suggest, along with the deranged LFTs, and support a diagnosis of alcoholic liver disease.

***Microvilli has core of microfilaments.

Microtubules:
Microtubules are non-branching hollow tubules made up of tubulin proteins (∝ and ß tubulin) with a diameter of 25 nm.

Locations:
· Cilia
· Flagella
· Centrioles
. Mitotic spindle
· Elongating cell processes and
· Growing axons

Functions:
1. Movement of cilia, flagella (tail of sperm)
2. Intracellular transport of vesicles
3. In cell division, formation of mitotic spindle
4. Maintenance of cell shape

The arterial supply of the uterus is from the uterine arteries, which arise from the internal iliac artery. There is a potential collateral supply from the ovarian arteries.

Cortisol has permissive action on glucagon & catecholamine

Explanation: durug causes dyspepsia are NSAIDs, Glucocorticoids, Iron and potassium, supplements

Projectile vomiting suggests brainstem compression (e.g., tumor, hydrocephalus)

Reference: Langman’s 13th; P-42

After formation, the spermatozoa are stored within the head of the epididymis. 

Spermatogenesis: The process of maturation of primordial male germ cell to mature sperm.
Onset: At puberty and continues up to old age.
Site: The wall of the convoluted seminiferous tubule 
Temperature required: 32 C.
Storage site: Head of epididymis.
Duration:
In man, the process of spermatogenesis requires 74 days, and passage through the epididymis approximately another 12 days. Therefore, it takes (74 days + 12 days) for a sperm for complete maturation and to be available for ejaculation.

Explanation: Campylobacter species have been linked to GBS & post infectious reactive arthritis.

Fibroblasts are the most common cells in connective tissue proper, produce and maintain most of the tissue’s extracellular components. Fibroblasts synthesize and secrete collagen (the most abundant protein of the body) and elastin, which both form large fibers, as well as the GAGs, proteoglycans, and multiadhesive glycoproteins that comprise the ground substance.

Explanation -
Transplacental transmission  :
Treponema pallidum
Listeria monocytogens
Cytomegalovirus 
Parbovirus B19
Rubella virus
Measles virus
HIV
Toxoplasma gondii 

Through birth canal :
Streptococcus agalactiae

Explanation: history remains the most important part of the clinical decision-making process. Studies show that physicians make a diagnosis in 70–90% of cases from the history alone

Ganong 26 th p 619-620

The gametocytes of P. falciparum are crescent-shaped (“banana-shaped”), whereas those of the other plasmodia are spherical.

An erect chest X-ray is highly diagnostic for a perforated peptic ulcer, showing free air under the diaphragm in ~70–90% of cases. CT is sensitive, ultrasound may detect fluid, and endoscopy confirms ulcers, but X-ray is the initial, rapid test for perforation.

Hyperreflexia is not a feature of myasthenia gravis. Davidson describes myasthenia gravis as an autoimmune disorder that causes muscle weakness and fatigue, particularly affecting the ocular, facial, and limb muscles. Diplopia (double vision) and ptosis (drooping eyelids) are common presenting symptoms. Harrison explains that reflexes are usually normal, and fatigue increases with activity, improving with rest.

TSH, also known as thyrotropin, is an anterior pituitary hormone; it is a glycoprotein with a molecular weight of about 28,000. This hormone increases secretion of thyroxine and triiodothyronine by the thyroid gland. It has the following specific effects on the thyroid gland:
1. Increased proteolysis of thyroglobulin that has already been stored in the follicles, releasing the thyroid hormones into the circulating blood and diminishing the follicular substance
2. Increased activity of the iodide pump, which increases the rate of "iodide trapping" in the glandular cells, sometimes increasing the ratio of intracellular to extracellular iodide concentration in the glandu- lar substance to as much as eight times normal
3. Increased iodination of tyrosine to form the thyroid hormones
4. Increased size and increased secretory activity of the thyroid cells
5. Increased number of thyroid cells plus a change from cuboidal to columnar cells and much infolding of the thyroid epithelium into the follicles
In summary, TSH increases all the known secretory activities of the thyroid glandular cells.

The most important early effect after administration of TSH is to initiate proteolysis of thyroglobulin, which causes release of thyroxine and triiodothyronine into the blood within 30 minutes. The other effects require hours or even days and weeks to develop fully.

Answer: C
Explanation: Chronic blood loss, particularly from the gastrointestinal tract or menstruation, is the most common cause of iron deficiency anaemia worldwide. Davidson highlights that iron deficiency leads to decreased haemoglobin synthesis and microcytic, hypochromic anaemia. Harrison further emphasises that iron deficiency is more prevalent in low-income countries due to dietary insufficiency and parasitic infections.