Nervous System
We have learnt about the Endocrine System. Specifically the hormones acting as chemical messengers that travel in the blood stream. In comparision, nerve communication is much quicker!
Hormone = Slow Control
Nerves = Fast Control
Functions of the Nervous System:
Hormone = Slow Control
Nerves = Fast Control
Functions of the Nervous System:
- To collect sensory input from the body and external environment.
- To process and interpret the sensory input.
- To respond appropriately to the sensory input.
Organs of the Nervous System
You need to be able to label, describe and state the function of the organs of the nervous system (including brain, spinal cord and nerves).
BRAIN -
SPINAL CORD -
NERVES -
- Receives information from and sends information to the peripheral nervous system
- Processes and interprets sensory information
SPINAL CORD -
- Relay messages from the brain to different parts of the body
- To pass along messages from sensory receptors to the brain, and
- To coordinate reflexes that are managed by the spinal cord alone.
NERVES -
- They detect changes in the environment, called stimuli, and turn them into electrical impulses.
Brain
Identify and label the parts of the brain and the basic function of each. Occipital lobe, parietal lobe, temporal lobe, frontal lobe, cerebral cortex, cerebellum, hypothalamus.
Neuron
Explain the structure of a neuron and briefly how the neuron works efficiently. You need to use terms such as axon, myelin sheath, dendrites, synapses and neurotransmitters.
3 Types of Neurons
Describe the different functions of each.
SENSORY -
SENSORY -
- Sensory neurons are nerve cells responsible for converting external stimuli from the organism's environment into internal electrical impulses
- Sensory neurons carry signals from the outer parts of your body (periphery) into the central nervous system
- Interneurons connect various neurons within the brain and spinal cord.
- Carry messages from one part of the CNS to another
- Motor neurons (motoneurons) carry signals from the central nervous system to the outer parts (muscles, skin, glands) of your body.
- Responsible for transmitting signals from the spinal cord to muscles, enabling muscle contraction