KMU Past Paper Practice

Question:

A severely anemic patient develops tissue hypoxia despite adequate ventilation and normal circulation. Which mechanism best explains the resulting oxygen deficiency?

Options:

Correct Answer: Reduced functional oxygen-carrying capacity

Explanation: Anemic anoxia occurs when blood cannot carry adequate oxygen despite satisfactory ventilation and circulation.

Question:

A man develops profound circulatory failure. His blood remains capable of carrying oxygen, but tissue perfusion becomes critically reduced. Which category of anoxia best fits this situation?

Options:

Correct Answer: Stagnant anoxia

Explanation: Stagnant or circulatory anoxia results from inadequate tissue blood flow despite oxygen being available in circulating blood.

Question:

During autopsy of an asphyxial death, numerous tiny hemorrhages are seen in the conjunctivae. Which pathophysiological change most directly produces these lesions?

Options:

Correct Answer: Rupture of congested small vessels

Explanation: Raised venous and capillary pressure can rupture small congested vessels, producing petechial hemorrhages.

Question:

A body is found suspended by a ligature. The examiner explains that loss of consciousness may occur rapidly even before severe systemic hypoxemia develops. Which event best accounts for this observation?

Options:

Correct Answer: Reduction of cerebral arterial perfusion

Explanation: Compression of carotid vessels can abruptly reduce cerebral blood flow, producing rapid cerebral ischemia and unconsciousness.

Question:

A man is discovered suspended from a low railing with his buttocks resting on the floor. The ligature remains tight around his neck. Which feature determines whether this can represent hanging?

Options:

Correct Answer: Body weight contributing to neck constriction

Explanation: Hanging requires body weight to provide the constricting force; complete suspension is not essential.

Question:

A ligature mark in a suspended body is pale, dry and parchment-like. Which process best explains this appearance?

Options:

Correct Answer: Drying and pressure at the ligature site

Explanation: Sustained ligature pressure with drying of compressed skin can give a hanging mark its characteristic parchment-like appearance.

Question:

During examination of a neck-compression death, a transverse ligature mark surrounds the neck and substantial hemorrhage is present in the underlying muscles. There is no evidence of suspension. Which diagnosis is best supported?

Options:

Correct Answer: Ligature strangulation

Explanation: A transverse encircling mark without suspension, especially with deeper neck injury, supports ligature strangulation.

Question:

A deceased woman has bruises and abrasions on the neck together with hemorrhage in deeper neck tissues. The examiner is considering whether these injuries occurred during life. Which finding most strongly supports a vital reaction?

Options:

Correct Answer: Hemorrhage within traumatized neck tissues

Explanation: Hemorrhage into injured living tissues supports trauma occurring while circulation was still active.

Question:

A body is retrieved from a pond several hours after death. The hands show immersion-related wrinkling, but the respiratory tract lacks convincing evidence of aspiration. Which principle should guide interpretation?

Options:

Correct Answer: Immersion changes alone do not establish drowning

Explanation: Skin changes can develop after death in water; drowning requires compatible vital respiratory and contextual evidence.

Question:

A swimmer is rescued after prolonged submersion but later dies. During the drowning process, which sequence best represents the central physiological progression?

Options:

Correct Answer: Respiratory impairment → hypoxemia → cerebral dysfunction

Explanation: Submersion impairs respiration, causing progressive hypoxemia that ultimately produces cerebral dysfunction and loss of consciousness.

Question:

At autopsy of a suspected drowning, fine froth is present within the tracheobronchial tree and the lungs are enlarged and waterlogged. How should these findings be interpreted?

Options:

Correct Answer: They support active respiration during submersion

Explanation: Froth within the airways and waterlogged lungs support aspiration during respiratory activity, but do not independently establish the manner of death.

Question:

Investigators recover a body from water with evidence suggesting respiratory aspiration. They ask whether this finding can establish whether the death was accidental, suicidal or homicidal. Which response is most appropriate?

Options:

Correct Answer: Manner requires correlation with circumstances and autopsy

Explanation: Aspiration may support ante-mortem drowning, but the manner of death requires integration of scene, history and complete postmortem findings.

Question:

An unconscious victim is found with adhesive material tightly covering both the mouth and nostrils. The airway below the pharynx is clear. Which form of mechanical asphyxia best fits the findings?

Options:

Correct Answer: Smothering

Explanation: Smothering results from external occlusion of the nose and mouth, preventing air from entering an otherwise unobstructed airway.

Question:

An elderly man with no external neck injuries collapses while eating. At autopsy, a large food bolus is lodged deeply in the upper respiratory passage. Which classification best describes this death?

Options:

Correct Answer: Choking

Explanation: Choking is internal airway obstruction by a foreign body such as impacted food.

Question:

A restrained victim has cloth packed into the mouth to prevent shouting. The material interferes with airflow and death follows. Which mechanism should be recorded?

Options:

Correct Answer: Gagging

Explanation: Gagging involves material placed in or across the mouth that may become fatal when it significantly obstructs breathing.

Question:

An infant is found dead after sharing a sleeping surface with an adult. Investigation suggests that the adult’s body compressed the infant and interfered with respiration. Which term best describes this mechanism?

Options:

Correct Answer: Overlaying

Explanation: Overlaying describes respiratory compromise of an infant caused by compression or obstruction from another person during shared sleeping.

Question:

A construction worker is trapped beneath a heavy slab across the thorax. At autopsy, there is striking cyanosis and congestion of the face and upper chest with conjunctival petechiae. Which mechanism best accounts for this pattern?

Options:

Correct Answer: Sudden elevation of venous pressure above compression

Explanation: Severe thoracic compression raises intrathoracic and venous pressure, producing characteristic upper-body congestion and petechiae.

Question:

A victim dies after the chest is pinned by heavy machinery. Besides venous congestion, which functional disturbance directly contributes to the fatal hypoxia?

Options:

Correct Answer: Failure of effective respiratory movement

Explanation: Thoracic compression prevents adequate chest expansion and ventilation, adding severe hypoxia to the venous effects of traumatic asphyxia.

Question:

A man is found dead with a neck-constricting device in a private setting. Investigation reveals sexual activity and a mechanism intended to permit rapid self-release. Which medico-legal interpretation is best supported?

Options:

Correct Answer: Accidental death associated with sexual asphyxia

Explanation: Evidence of sexual activity with an intended self-release mechanism supports temporary intentional oxygen restriction that became accidentally fatal.

Question:

A deceased person has conjunctival petechiae, facial cyanosis and visceral congestion. No characteristic neck, airway, chest-compression or drowning findings are identified. Which conclusion is most appropriate for the forensic report?

Options:

Correct Answer: The findings require correlation before assigning a mechanism

Explanation: General asphyxial signs are nonspecific; a particular mechanism should be assigned only after correlation with scene and specific autopsy findings.