Coordination involves the adjustment and cooperation of various body parts and systems. There are two types of coordination: nervous coordination involving the brain, spinal cord, and nerves; and hormonal coordination involving glands and organs. The document then describes the structure and function of the nervous system including neurons, receptors, effectors, and reflex actions. It also discusses proprioception and kinaesthetic senses which provide awareness of body position and movement. Voluntary actions are controlled by desires while involuntary actions are controlled by the medulla oblongata. Finally, it notes that alcohol can hinder nervous system function and coordination by slowing impulse transmission and potentially damaging liver cells.

3. • Coordination is the adjustment of our
body’s responses towards any stimuli that
involve several parts of body.
• Coordination involves the adjustment of
organs, limbs and body system
•There are two types of body coordination i.e
nervous coordination and hormonal
coordination

4. Contains nerves that
The centre of
connect the spinal
coordination in
cord to internal
humans
organs and glands
Consists of cranial Consist of the
autonomic nervous
nerves and spinal
system and the
nerves that control
somatic nervous
voluntary actions
system

5. Human nervous
system
Central nervous Peripheral
system nervous system
Spinal Autonomic
brain Somatic
cord nervous
nervous system
system (not
(controlled)
controlled)
Cranial nerves Spinal nerves

6. • The neurone is the basic unit of the nervous
system. Its function is to carry nerve impulses
•A receptor is a cell in the sensory organ that
identifies stimuli due to changes in the
surroundings
•An effector is an organ that responds
towards the received stimuli

8. Cell
body
nucleus Node of
axon ranvier
cytoplasm
myelin Nerve
dendron
sheath ending
dendrite

9. • Reflex action is the automatic quick body
response towards external stimuli that occurs
without brain control
•Reflex action is controlled by the spinal cord
and this action protects us from danger or
injury
•Receptors are sensory cells in the skin
whereas effectors are limb muscles.

11. • A proprioceptor can act as sensory organ
because of its sensitivity to muscle
contraction
•Kinaesthetic sensory receptors are found in
the muscles, joints, ligaments and tendons
•Kinaesthetic sense enables us to be aware
of the position of our body to maintain
balance and also to enables us to detect
body movements

13. •Voluntary action
o- type of action that
is controlled by desires
•Involuntary actions
o- controlled by the
medulla oblongata

17. • Alcohol affects the nervous system by
hindering the efficiency of its function and
coordination
•The response time of a drunkard during
emergencies is longer
•Alcohol can interfere with the cerebrum and
slow down its impulse transmissions
•Alcohol can damage liver cells, decrease bile
production and cause liver cirrhosis and
hepatitis