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Q. Global alteration of brain functioning - Sleep?
Sleep involves a global alteration of brain functioning, and occupies one third of our lives, The transition from waking to sleep is one of the most dramatic natural alterations in consciousness. Sleep is differentiated from waking state by reduction in neuronal responsiveness, inattention to sensory stimuli, and loss of consciousness. These two states differ fundamentally in most physiological parameters including the activity of a variety of key neurotransmitter systems.
Sleep Structure: Electroencephalogram (EEG) recordings reveal the two most basic states of sleep - REM (Rapid Eye Movement) sleep and NREM sleep. NREM comprises of four stages (Stages1 to 4). EEG pattern of wakeful state and different stages of sleep is explained further.
Active wakefulness: It is accompanied by low amplitude, high frequency beta waves. In relaxed wakefulness with eyes closed, the brain emits alpha waves. Alpha waves are low amplitude brain waves of about 8 to 13 cycles per second.
Q. How different is the simple squamous epithelium from the stratified squamous epithelium? Where can these epithelia are found in the human body? The simple squamous epitheliu
How is the genetic determination of sex established in humans? In the diploid genome of the human beings, there are 46 chromosomes, 44 of them are autosomes and two are sex chr
Determine the name of Material used for BCC You must be interested to know about type of material you can prepare and some material is available in hospitals and clinics for us
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Hydrogen bonds are important for all of the following except:: a) Allowing carbohydrates to dissolve in water b) Stabilizing the three-dimensional shape of proteins. c) Ma
Q. What are the chemical substances that facilitate to compose the plasma membrane? The major constituents of the plasma membrane are phospholipids, proteins and carbohydrates.
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Extraradicular Infections Whatever the cause of post endodontic disease we should do proper diagnosis to determine what is the cause; is it intra or extraradicular infection ,
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