NEET PG/NEXT (MCQs)

2021-12-26 17:57:02 Explanation

• Insula is called island of Reil or central lobe
• The word insula means hidden. The insula is the submerged portion of cerebral cortex in the floor of lateral sulcus.
• The insula is divided into 2 regions. Anterior and posterior by a central sulcus. The anterior region represents 3 or 4 short gyri called gyri brevia and posterior region presents 1 or 2 long gyri called gyri longa.
• The insulae are involved in consciousness and play a role in diverse functions usually linked to emotion or the regulation of the body’s homeostasis. These functions include perception, motor control, self awareness, cognitive functioning and interpersonal experience. Open / Comment

2021-12-26 13:57:02 Open / Comment

2021-10-08 18:10:02 Explanation

• Carvedilol is a third generation beta blocker having blocking property of β1 + β2 + α1.
• It produces peripheral vasodilation due to blocking property of α1 as week as L type calcium channel blocker.
• Carvedilol also inhibits free radical induced lipid peroxidation
• Other third generation beta blocker having similar property is labetalol. Open / Comment

2021-10-07 17:47:02 Explanation

Autograft: Transplantation of tissue to the same person, from whom the tissue is harvested
Isograft: Transplantation of organ or a tissue from a donor to genetically identical recipient like the twins.
Allograph: Transplant of an organ or tissue between two genetically non identical members of same species.
Xenograft: Transplant of organ or tissues from one species to other Open / Comment

2021-10-06 17:46:02 Explanation

Types of sweating
• Gustatory sweating: Sweating on scalp, forehead and nose in response to hot and spicy meals
• Mental sweating: Occurs in response to emotional stimuli like mental stress, emotional stress. sweating usually noticed on palms, soles and axilla.
• Thermogenic sweating: Sweating in response to pre-optic stimulation of hypothalamus in order to maintain the body temperature. Open / Comment

2021-10-05 17:46:02 Explanation

• Reduced hemoglobin: It results from release of Oxygen from OxyHb
• Carbaminohemoglobin: In this, Carbon di oxide is attached to globin part of Hb. The affinity of Hb for Carbon di oxide is about 20 times that for Oxygen
• Carboxyhemoglobin: Carbon monoxide is attached to Hb where O2 is normally attached. The affinity of Hb for CO is 200-300 times that for Oxygen. It is normally present in small amounts, but in large amount in smokers in whom it impairs Oxygen transport.
• Methemoglobin: When blood is exposed to some drugs, or oxidizing agents in vitro or in vivo, the ferrous iron of Hb is converted into ferric iron, forming MetHb, which is dark in color. When present in large amounts, it gives a dusky appearance to the skin. Small amounts of MetHb are formed normally but an enzyme system converts it back to Hb. Open / Comment