KMU Past Paper Practice

Question:

A 45-year-old man dies following irreversible cardiorespiratory failure. Shortly afterward, viable cells can still be demonstrated in some tissues despite death of the individual. Which concept best explains this observation?

Options:

Correct Answer: Somatic death can precede death of individual tissues

Explanation: Somatic death is death of the individual as an integrated organism; molecular death follows progressively as different cells and tissues lose viability.

Question:

A ventilated patient with catastrophic brain injury is being evaluated for neurological death. His pupils do not respond to light and corneal, gag and cough responses are absent. Which additional finding most directly completes the clinical assessment of brainstem function?

Options:

Correct Answer: Absence of spontaneous respiratory drive

Explanation: Irreversible coma and absent brainstem reflexes must be accompanied by absence of spontaneous respiratory drive during appropriate assessment.

Question:

A deeply unconscious patient is considered for brain death assessment after a major intracranial event. His core temperature is markedly reduced. Why should definitive assessment be deferred until this problem is corrected?

Options:

Correct Answer: Low temperature may reversibly suppress neurological responses

Explanation: Hypothermia can mimic severe neurological failure by reversibly depressing consciousness, reflexes and respiration; reversible confounders must be excluded.

Question:

A patient has catastrophic irreversible brain injury. An EEG shows no detectable cerebral cortical electrical activity. Which limitation is most important when interpreting this finding?

Options:

Correct Answer: EEG does not independently demonstrate all brainstem functions

Explanation: EEG mainly reflects cortical electrical activity; absence of cortical activity does not by itself demonstrate irreversible loss of every brainstem function.

Question:

A ventilated patient has been correctly declared brain dead. An ECG continues to demonstrate organized cardiac electrical activity. Which interpretation is most appropriate?

Options:

Correct Answer: Cardiac electrical activity can persist despite established brain death

Explanation: ECG records cardiac rather than cerebral activity. The heart may continue electrical and mechanical activity when circulation and ventilation are supported after brain death.

Question:

A rescue team finds an unconscious person after prolonged cold exposure. Respiratory movements are extremely shallow and the peripheral pulse is difficult to detect. Which forensic concept is most important before irreversible death is concluded?

Options:

Correct Answer: Apparent death

Explanation: Apparent death is profound depression of vital functions that can mimic death despite persistence of life, particularly in potentially reversible states such as severe hypothermia.

Question:

After death is confirmed, a family agrees to consideration of tissue donation. Which principle best reflects the medico-legal framework governing removal and use of human tissue?

Options:

Correct Answer: Lawful authorization and applicable consent remain essential

Explanation: Human tissue use requires lawful authorization, appropriate consent where applicable, respect for the deceased and proper medical governance.

Question:

During medico-legal examination, a doctor is asked to state the precise hour of death solely from rigor mortis. Which response best reflects sound forensic interpretation?

Options:

Correct Answer: Rigor contributes to estimation but must be interpreted with other findings

Explanation: Rigor varies with temperature, muscular activity and body condition. It contributes to postmortem assessment but cannot establish an exact hour of death alone.

Question:

A body is found lying on its right side. Purplish discoloration is prominent over the right dependent surface, but the skin directly beneath a tightly compressed area remains pale. What best accounts for this contrast?

Options:

Correct Answer: External pressure has prevented vascular filling locally

Explanation: Lividity forms as blood settles in dependent vessels. External pressure compresses these vessels and produces pale areas of contact pallor.

Question:

A deceased person is found supine, but established lividity is predominantly present over the anterior trunk. Which inference should the examiner consider?

Options:

Correct Answer: The body may have been repositioned after death

Explanation: Lividity develops in dependent areas. A distribution inconsistent with the position in which a body is found can suggest postmortem repositioning.

Question:

A reddish-purple patch over the back of a body is suspected to be either postmortem hypostasis or an antemortem bruise. Which finding most strongly favors traumatic bruising?

Options:

Correct Answer: Blood infiltrating the surrounding tissues

Explanation: Bruising involves extravasation of blood into tissues following injury, whereas blood in postmortem lividity remains predominantly within vessels.

Question:

During examination of a body, the doctor records the site, color and extent of lividity and notes whether it blanches on pressure. Which additional feature is most useful for interpreting the positional significance of the finding?

Options:

Correct Answer: Relation of distribution to body position

Explanation: Comparing lividity with body position helps determine whether its distribution is expected for the position found and may raise the possibility of repositioning.

Question:

Soon after death, a body’s muscles are relaxed. Later they become stiff despite the absence of neural stimulation. Which cellular event most directly produces this transition?

Options:

Correct Answer: ATP depletion preventing contractile protein disengagement

Explanation: After ATP is depleted, actin and myosin cannot detach normally, producing the postmortem muscular stiffness of rigor mortis.

Question:

Two individuals of similar build die under comparable circumstances. One body is exposed to moving cold air while the other remains in a warmer enclosed room. Why should their body temperatures not be interpreted using a single fixed cooling rate?

Options:

Correct Answer: Environmental conditions alter postmortem heat loss

Explanation: Ambient temperature, air movement, clothing, body habitus and contact surfaces influence algor mortis, preventing use of a universal fixed cooling rate.

Question:

A recently deceased body shows loss of voluntary movement and generalized muscular relaxation but no established lividity, rigor or decomposition. How should these findings be classified?

Options:

Correct Answer: Immediate postmortem changes

Explanation: Loss of vital functions, voluntary movement and primary muscular tone occur immediately after death, before the established early changes develop.

Question:

During examination of a body, the cornea is becoming cloudy and exposed ocular surfaces are dry. Which mechanism best accounts for these early findings?

Options:

Correct Answer: Loss of normal circulation and surface moisture

Explanation: After death, tear production and normal ocular physiology cease; exposed surfaces lose moisture and the cornea gradually loses clarity.

Question:

A body undergoes progressive tissue softening and loss of normal anatomical structure after death. Both endogenous enzymes and bacteria are contributing to the process. Which description best integrates these mechanisms?

Options:

Correct Answer: Autolysis and microbial activity produce decomposition

Explanation: Late decomposition reflects self-digestion by cellular enzymes together with increasing microbial breakdown of tissues.

Question:

A body recovered from an extremely dry environment shows marked dehydration and preservation of tissues with relatively limited ordinary putrefaction. Which environmental effect best explains this pattern?

Options:

Correct Answer: Tissue desiccation has favored mummification

Explanation: Dry environmental conditions promote rapid dehydration of tissues, modifying ordinary decomposition and producing mummification.

Question:

A forensic report describes lividity as “dark discoloration over the back.” The supervising doctor asks for a more useful description. Which combination of additional observations would best improve the report?

Options:

Correct Answer: Color, extent, contact pallor, fixation and positional relationship

Explanation: A useful lividity report objectively records its color, distribution and extent, pressure pallor, fixation and relationship to the body’s position.

Question:

A medico-legal examiner documents cooling, dependent lividity, rigor mortis and early drying in a body. Investigators ask whether these findings alone establish an exact time and cause of death. Which interpretation is most appropriate?

Options:

Correct Answer: The findings support postmortem assessment but require contextual interpretation

Explanation: Postmortem changes provide useful medico-legal evidence, but their development varies and they cannot independently establish an exact time or cause of death.