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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.
What are ganglia? Ganglia (singular ganglion), or neural ganglia, are structures located outside the central nervous system (for instance, beside the spinal column or near visc
Q. Why is the endocrine system considered one of the integrative systems of the body? What is the other physiological system that also has this function? The endocrine system i
Rhinosporidiosis (Fungal-like agent) Rhinosporidiosis is a chronic, non-fatal, granulomatous mycotic infection of nasal mucosa caused by Rhinosporidium seberi. R. seberi is curren
Determine the architecture of cell There are over 200 types of cells in the human body, which are assembled into a variety of tissues, such as, the epithelia, connective tissue
Cutaneous respiration in earthworm. The respiration performed by the skin is called cutaneous respiration In earthworm skin is the only organ of respiration. The skin
Neuston - Aquatic Ecosystem These are unattached organisms which live at the air-water interface such as floating plants and several types of animals. Some spend most of their
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4 Put the following events in the most probable order. (a) Predatory birds poisoned by insecticide. (b) Trees sprayed with insecticide. (c) Earthworms eat leaves which f
In studies of human body, which of the below terms is used to describe hereditary condition associated with an excessively high level of uric acid in blood? a) Uric ptosis b
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