Nervous System Flashcards
What is a stimulus
A change in your surroundings that is detected by a receptor and produces a response
What is a receptor
Something that detects a stimulus.
Example of a receptor:
Eyes, ears, nose, tongue skin
What are the 2 main parts of the nervous system
Brain + Spinal cord
What does the cerebum do
Coordinates sensations, movements, memory, thought and intelligence
What does the cerebellum do
Coordinates balance and precise movements
Which is the big part of the brain ‘cerebrum’ or ‘cerebellum’
Cerebrum is the bigger part of the brain
The brain is enclosed in the cranium of the ________ while the spinal cord is enclosed in the ______________ column
Skull
Vertebral
What are the functions of cerebrospinal fluid
To act as a cushion for absorbing external shock
Nourishes neurons inside as it enables the diffusion of oxygen and food to nervous cells
Helps in preventing the collapse of the Central Nervous System
The ____________ is in control of breathing and beating of the heart
Medulla
Where is the medulla located
Low part of brain… near the spine lower than cerebellum, pituitary gland and obviously celebrum
How does information flow from one neuron to another
Across a synapse
One neuron can have thousands of ______________ on its body and dendrones
Synapses
An electrical impulse cannot cross a synapse. Instead, the nerve impulses is carried by chemicals called ___________________. These chemicals are made by the cell that is sending the impulse and stored in synaptic ____________ at the end of the _________. The cell that is receiving the impulse has __________________ on its surface
Neurotransmitters
Vesicles
Axon
Neuroreceptors
When the neurotransmitter diffuses across the gap and binds to these receptors, the nerve ____________ is carried on to the next ___________. After the impulse has been passed on, the _______________ is broken down by enzymes
Impulse
Neurone
Neurotransmitter
