NURSING ANM AND GNM

NURSING EXAM QUESTIONS

PATHOLOGY AND GENETICS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
How long does it take for rigor mortis to begin postmortem?
A
2-4 hours
B
2-6 hours
C
12 hours
D
48 hours
Explanation: 

Detailed explanation-1: -Rigor mortis appears approximately 2 hours after death in the muscles of the face, progresses to the limbs over the next few hours, completing between 6 to 8 hours after death.

Detailed explanation-2: -Rigor mortis appears in 1 to 2 hours after death, is completely formed 12 hours after death, is sustained for the next 12 hours, and vanishes over the next 12 hours, sometimes referred to as the ‘march of rigor.

Detailed explanation-3: -When oxygen is no longer present, the body may continue to produce ATP via anaerobic glycolysis. When the body’s glycogen is depleted, the ATP concentration diminishes, and the body enters rigor mortis because it is unable to break those bridges.

Detailed explanation-4: -For approximately the first 3 hours after death the body will be flaccid (soft) and warm. After about 3-8 hours is starts to stiffen, and from approximately 8-36 hours it will be stiff and cold. The body becomes stiff because of a range of chemical changes in the muscle fibres after death.

Detailed explanation-5: -Rigor mortis comes to an end because of the decomposition of the muscles and the body, a cycle called secondary flaccidity.

There is 1 question to complete.