• Coordination is the adjustment of ourbody’s responses towards any stimuli thatinvolve several parts of body.• Coordination involves the adjustment oforgans, limbs and body system•There are two types of body coordination i.enervous coordination and hormonalcoordination
Contains nerves that The centre of connect the spinal coordination in cord to internal humans organs and glandsConsists of cranial Consist of the autonomic nervous nerves and spinal system and thenerves that control somatic nervous voluntary actions system
Human nervous systemCentral nervous Peripheral system nervous system Spinal Autonomicbrain Somatic cord nervous nervous system system (not (controlled) controlled) Cranial nerves Spinal nerves
• The neurone is the basic unit of the nervoussystem. Its function is to carry nerve impulses•A receptor is a cell in the sensory organ thatidentifies stimuli due to changes in thesurroundings•An effector is an organ that respondstowards the received stimuli
• Reflex action is the automatic quick bodyresponse towards external stimuli that occurswithout brain control•Reflex action is controlled by the spinal cordand this action protects us from danger orinjury•Receptors are sensory cells in the skinwhereas effectors are limb muscles.
• A proprioceptor can act as sensory organbecause of its sensitivity to musclecontraction•Kinaesthetic sensory receptors are found inthe muscles, joints, ligaments and tendons•Kinaesthetic sense enables us to be awareof the position of our body to maintainbalance and also to enables us to detectbody movements
•Voluntary actiono- type of action thatis controlled by desires•Involuntary actionso- controlled by themedulla oblongata
• Alcohol affects the nervous system byhindering the efficiency of its function andcoordination•The response time of a drunkard duringemergencies is longer•Alcohol can interfere with the cerebrum andslow down its impulse transmissions•Alcohol can damage liver cells, decrease bileproduction and cause liver cirrhosis andhepatitis