Medics®

This person was bitten by a spider ,but little did he know that it had been a recluse spider! Leaving it untreated allowed the venom to cause these lesions . Scientists say this venom contains a rare protein that can cause a lesion as well as a much less common, but more dangerous systemic reaction in humans.. The most common response is inflammation, which ,aftr one to two days can develop into a "dark lesion" surrounding the bite site. The blackining, or " necrosis" ,of the skin is dead skin cells, evidence of the immune systems effort to prevent the spread of the toxin by preventing blood flow to the affected area.

Answer: A. Fingerprints Identical twins have the same DNA, but their fingerprints (dactylography) are still diferent and they do not change. These can be easily used to differentiate between an identical set of twins. Identical twins have the same set of DNA, therefore DNA fingerprinting cannot differentiate them

Answer-D. Saturated salt solution Toxicological viscera is preserved in a saturated solution of common salt (sodium chloride). For toxicological analysis, viscera is never preserved in alcohol, formalin, or bile salt. In fact, formalin denatures proteins and chemicai toxins and would interfere with the detection of poisons during chemical analysis

Answer-C. Carbolic Acid The only obsolute contraindication is corrosive poisoning i.e alkalis, mineral acid, vegetable acid and organic acids (except carbolic acid). Carbolic acid is the only corrosive in which gastric lavage can be used. Gastric lavage must be done (except when contraindicated) irrespective of whether vomiting has occured or not, to prevent aspiration of content. Carbolic acid is the only corrosive in which gastric lavage is not contraindicated.

Answer-B. Myocardium state of the muscles in a dead body when they become stiff or rigid with some degree of shortening. All muscles of body are involved i.e. voluntary or involuntary. However, it does not start in all muscles simultaneously (nysten’s rule). Involuntary muscles (heart) are involved first than voluntary muscles. Sequence of muscles involvement is as follows: Heart> upper eyelid> neck > jaw>face > chest > upper limb > abdomen > lower limb > finger and toes

Answer: D. skin subcutaneous fat The clinical entity of degloving injury means that the skin has been lost, but the musculoskeletal unit is intact, and hence, the movements of the part have been preserved. Degloving, also called avulsion, is a type of severe injury that happens when the top layers of your skin and tissue are ripped from the underlying muscle, connective tissue, or bone. It can affect any body part, but it’s more common in the legs Depending on the angle that the tire pullas across the extremity, the skin and subcutaneous tissue may be pulled or sheared off on leading edge of extremity.