Coordination: is the way all the organs and systems of the body are made to work efficiently together.For example, when muscles are being used for running they need extra glucose and oxygen. So we increase the breathing rate to obtain extra oxygen and the heart pumps more rapidly to take de oxygen and the glucose to the muscles more quickly.The brain detects changes in O2 and CO2 in the blood and sends nervous impulses to the respiratory muscles and heart in order to increase their activities. This is one example of coordination, between mane organs.
The nervous system Works by sending impulses along the nerves.
The human nervous system.The brain and spinal cord form together de CENTRAL NERVOUS SYSTEM.Nerves carry electrical impulses, from the central nervous system to all parts of the body, making muscles contract.
The nerves which connect the body to the central nervous system make up the PERIPHERAL NERVOUS SYSTEM.Muscles are calledEFFECTORS because theygo into action when theyreceive nerve impulses.
Nerve impulses from From the central nervous the sense organs system, this impulses are (skin, eye, ears) to the carried to the central nervous EFFECTORS, resulting in system are called action. These are called SENSORY MOTOR IMPULSES. IMPULSES. This is the way by which information from the peripheral receptors travel to the central nervous system.
SENSORY MOTORNEURONE NEURONE CENTRAL NERVOUS SYSTEM. EFFECTOR.RECEPTOR MUSCLES.STIMULUS RESPONSE
Nerve cells. NEURONES. The central nervous system, and the peripheral nerves are made up of neurones. MOTOR NEURONE MULTI POLAR SENSORY NEURONES NEURONESCarry impulses from Are neither sensory nor Carry impulses fromthe central nervous motor but make the sense organs to thesystem to the muscles. connections to other central nervous system. neurones inside the central neorvous system.
CLASSROOM ACTIVITY:From page 164, read NERVE CELLS. Draw and label the three types of neurones. Give at least 2 structural differences between sensory and motor neurones. Give one functional difference between a sensory and a motor neurone.
SynapseIt is necessary for impulses to pass from one neurone to another. The regions where impulses are able to cross from one neurone to the next are called SYNAPSES. At a synapse a branch at the end of one fibre is in close contact with a dendrite of another neurone. When an impulse arrives at the synapse, it releases a tiny amount of a chemical substance called a NEUROTRANSMITTERSUBSTANCE, which sets off an impulse in the next neurone.
The NERVE IMPULSE The impulse is a series of electrical pulses, which travel down the fibre. All the impulses are similar. The difference is that each impulse is sent to different parts of the brain.For example, the nerves from the aye go to the part of the brain concerned with sight. Then the brain recognizes that the impulses comes from the aye and we SEE something.