স্পেশাল বিসিএস (স্বাস্থ্য)

Regular moderate-intensity exercise (including aerobic and strengthening exercises) and weight loss (for overweight or obese individuals) are the most effective non-pharmacological interventions for managing OA pain and improving function. They reduce joint load, strengthen supporting muscles, and improve joint mobility.

Explanations:
Normal pH value is 7.4 and lethal values only about 0.5 on either side of normal.

The ultimate goal of respiration is to maintain proper concentrations of O2, CO2 & H+

Reference: Davidson 23rd; P-852
সলভ ক্লাসের জন্য আলোচনা পোস্ট দেখুন - [আলোচনা পোস্টের লিঙ্ক]

anaemia occurs in kala-azar due to hypersplenism

SLE is Immune complex mediated hypersensitivity

Explanation: Hypertrophic cardiomyopathy results in diastolic (relaxation) dysfunction. Virtually all cases are due to autosomal dominant mutation

Reference: Davidson 23rd; P-669

Interstitial fluid is three-fourths of the ECF. Thus, it is one-fourth of TBW. The composition of interstitial fluid is the same as that of plasma except that it has little protein. Thus, interstitial fluid is an ultrafiltrate of plasma.

Development of placenta
The placenta is the only organ in the body that develops from two different individuals
     The fetal portion develops from chorion frondosum
     The maternal portion from the decidua basalis

Ref: Davidson 23rd; P-1020

• RA typically manifests as a symmetric arthritis principally affecting the small joints of the hand and feet.

PE can cause hemoptysis due to pulmonary infarction, often with sudden dyspnea and pleuritic pain

Tophi are pathognomonic (distinctive) subcutaneous or articular deposits of monosodium urate crystals that occur in chronic, untreated hyperuricemia. They are characteristic of chronic tophaceous gout and can lead to joint destruction and deformity. Heberden's nodes are osteophytes in osteoarthritis.

Molluscum contagiosum is caused by a DNA poxvirus skin infection. It is most common in children over the age of 1 year, particularly those with atopic dermatitis. It also occurs frequently in immunosuppressed patients, including those with HIV. Lesions are dome-shaped, ‘umbilicated’, skin-coloured papules with central punctum . They are often multiple and found at sites of apposition, such as the side of the chest and the inner arm.

Q waves May signify previous myocardial infarction

Reference: Junqueira’s Basic Histology; 14th Edition; Page-438

Explanation: Diseases associated with mosquito bite includes Malaria, dengue fever, Chikungunya, filariasis, tularaemia

[Ref. Vishram Sinmgh Clinical Neuroanatomy]

Basal ganglia is concerned with planning of voluntary movement.

Other three are catecholamines only.

Explanation: Viruses are the most common cause of meningitis, usually resulting in a benign and self-limiting illness requiring no specific therapy. It is much less serious than bacterial meningitis unless there is associated encephalitis. A number of viruses can cause meningitis, the most common being enteroviruses

Reference: Davidson 23rd; P-514
সলভ ক্লাসের জন্য আলোচনা পোস্ট দেখুন - [আলোচনা পোস্টের লিঙ্ক]

Explanation: Legal documents require authorized identification and attestation by the concerned physician. (Ref: Reddy, Documentation Standards)

♣ Rima glottidis: The space between two vocal folds is called 'rima glottidis'. It is the narrowest part of the larynx.
♣ Rima vestibuli: The spce between two vestibular folds (false vocal cords) is called rima vestibuli.
♣ Sinus/vestibule of larynx: It is the space between the vocal fold and vestibular folds. 

Reference: Langman’s 13th; P-46

Capillaries have only an endothelium, with no subendothelial layer or other tunics.

Cellulitis is spreading infection & caused by S. Pyogens. Hyaluronidase is the spreading factor.

( Ref : Davidson 23rd ,p - 257 )

The middle ear is a small space placed deep within the petrous part of the temporal bone. It is also called the tympanum.

Sleepwalking (somnambulism), bed-wetting (nocturnal enuresis), and night terrors are referred to as parasomnias, which are sleep disorders associated with arousal from non-REM and REM sleep. Episodes of sleepwalking are more common in children than in adults and occur predominantly in males. They may last several minutes.
Somnambulists walk with their eyes open and avoid obstacles, but when awakened they cannot recall the episodes.

gangliocytoma is a neuronal tumour of CNS

Calcitonin is secreted from parafollicular cell

Explanation: Felty’s syndrome is a rare complication of seropositive RA in which splenomegaly occurs in combination with neutropenia and thrombocytopenia

Rose spots are faint salmon-colored macules on the trunk and abdomen seen in about 30% of cases

DEC (see above) is curative, in a dose of 9–12 mg/kg daily, continued for 21 days

Reference: Davidson 23rd; P-765
সলভ ক্লাসের জন্য আলোচনা পোস্ট দেখুন - [আলোচনা পোস্টের লিঙ্ক]

The process that establishes all three germ layers (ectoderm, mesoderm, and endoderm) in the embryo is called- Gastrulation

Reference: Davidson 23rd; P-835
সলভ ক্লাসের জন্য আলোচনা পোস্ট দেখুন - [আলোচনা পোস্টের লিঙ্ক]

Paromomycin is an aminoglycoside that is used to treat visceral leishmaniasis and intestinal amoebiasis. It is not significantly absorbed when administered orally, and is therefore given orally for intestinal amoebiasis and by intramuscular injection for leishmaniasis. It showed early promise in the treatment of HIV-associated cryptosporidiosis but subsequent trials have demonstrated that this effect is marginal at best.

Explanation :
The ultrastructural changes of reversible cell injury, visible by
electron microscopy,  include the following:
1. Plasma membrane alterations, such as blebbing, blunting, and loss of microvilli
2. Mitochondrial changes, including swelling and the appearance of small amorphous densities
3. Accumulation of “myelin figures” in the cytosol composed of phospholipids derived from damaged cellular membranes
4. Dilation of the ER, with detachment of polysomes 5. Nuclear alterations, with disaggregation of granular and fibrilar elements.

Justification: In patients with pre-existing valvular abnormalities, such as mitral valve prolapse, streptococcus viridans is the most common cause of infective endocarditis. Davidson emphasizes that viridans streptococci typically enter the bloodstream following dental procedures or minor mucosal trauma. Harrison describes the importance of prophylactic antibiotics in high-risk patients undergoing invasive procedures.

Reference: Davidson 23rd; P-592
সলভ ক্লাসের জন্য আলোচনা পোস্ট দেখুন - [আলোচনা পোস্টের লিঙ্ক]

Reference: Davidson 23rd; P-674

Alzheimer’s disease is a degenerative disease affecting cerebral cortex

Lung fluukes: Paragonimus spp

Neurotransmitter degrading enzyme locate in synaptic cleft

Explanation: Causes of Central chest pain: Cardiac, aortic, oesophagial, Mediastinal, Pulmonary embolus & Anxiety/emotion. Peripheral chest pain: Lungs/pleura, Musculoskeletal, Neurological.
Ref: Davidson 23rd, Page-177

Following are the clinical indications for performing the Ghrelin Blood Test:
1. Gastric bypass surgery.
2. Monitoring obesity.
3. Rapid weight loss or weight gain.
4. Suspected anorexia nervosa

The middle ear is a small space placed deep within the petrous part of the temporal bone. It is also called the tympanum.

Reference: Davidson 23rd; P-592

Reference: Davidson 23rd; P-853
সলভ ক্লাসের জন্য আলোচনা পোস্ট দেখুন - [আলোচনা পোস্টের লিঙ্ক]

Reference: Davidson 23rd; P-746

Reference: Davidson 23rd; P-514
সলভ ক্লাসের জন্য আলোচনা পোস্ট দেখুন - [আলোচনা পোস্টের লিঙ্ক]

Explanation : Listeria causes more significant invasive infection , especially in pregnant women, older adults ( over 55 years ) and the immunocompromised.