NERVOUS SYSTEM
KONTAXAKIS ANTONIOS (27336)
TRIANTAFILLOU EVANGELIA FEDRA
(27363)
INTRODUCTION
Coordination of our body system is achieved through our nervous system, a long leap forward in a millions of years evolution battle.
Cellular level
The nervous system is based on the interconnection of neurons, each sending and receiving nerve impulses.
Receptors
Stimuli are received through special mechanisms, receptor organs such as chemo-or thermoreceptor. (Meissner’s tactile or end buld of Krause)
SENSORY ORGANS
Our sensory organs are: the ear the eye the nose(nasal passages) the tongue skin&hairs&nails
1. Ear: an organ for hearing and balance
2. Eye: an organ of sight.
3.The tongue:a strong muscle at the floor of the mouth that is covered by the lingual membrane. It is the organ of taste.
4.Skin:It consists of 3 layers: a)the epidermis b) the dermis c) the subcutis.
The nails are a form of skin and it is formed by keratin.
5.The nose(nasal passages): an organ of
smell.
Pathway till command centres
Peripheral nervous system is then assigned to carry info till our brain or spinal cord.
Command Centres
Brain interneurons and spinal cord reflex arcs are assigned to decode stimuli value and decide action.
Reflex
Reflexes offerfast reactionwithoutimmediatebrainparticipation.
Brain parts
Our brain comprises of– the cerebrum responsible for most of brain
information processing– the brain stem dealing with involuntary
functions of vital importance – the cerebellum offering balance and
equilibrium as well as memory of repetitive acts
The Brain
Action
Motor neurons carry the final command till the neuroglandular or neuromuscular junction where action takes place.
Diseases of nervous system
Epilepsy: a disorder in which nerve cells of the brain, from time to time, release abnormal electrical impulses.
Brain tumors Lyme disease: a bacterial illness that is
transmitted to humans by the bite of deer tick.
What can we do to maintain a healthy nervous system?
•Well balanced diet
• Regular exercise
•Stress management
•Pharmacist’s Supplement Recommendation
Vitamins and Minerals
Antioxidants
Essential Fatty Acids
Amino Acids
Herbs and Phytonutrients
Strengths and weaknesses
rapid and effective info processing
culture– language– science– ethics– adaptability
conciousness
Pain inability to renew drug addiction certain spectrum of
sound+radiation frequency
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