The Nervous System: This is your Brain Flashcards
What does the nervous system allow our body to do?
Respond to its environment.
How many senses do we have?
5
Our senses are specialized systems that communicate particular physical _______.
Stimuli.
Who/What is the decision maker?
The brain.
The nervous system also controls bodily functions such as: name 2 things
1-breathing
2-heart beat
The nervous system can also command glands to do what?
Produce more or less of their hormones.
What are the 3 main parts of the nervous system?
1-Brain
2-Nerves
3-spinal cord
What 3 things help process data? (In the brain)
1-cerebrum
2-cerebellum
3-brainstem
What is the cerebrum?
The top/higher part of the brain.
What is the cerebellum?
The bottom/lower part of the brain.
What is the brain stem?
It’s connected to the brain and the spinal cord.
What do nerves do?
They carry messages to and from the brain.
What is the spinal cord?
It’s where all the nerves pass info back and forth between the body and the brain.
Automatic responses happen in the center, what is this response called?
Reflex.
What are neurons?
They are the cells that transmit electro/chemical messages.
What are neurons made of? (Name 4 things)
1-Dendrites
2-A cell body
3-An axon
4-Terminals
What do dendrites do?
They receive nerve impulses.
If the neuron fires a message, the nerve impulse will travel down the ______.
Axon.
After traveling down the axon, the nerve impulses will release chemicals at the ______ ______, to do what?
Terminal Buttons to send a message to another neuron..
What insulates the electrical messages?
Myelin.
What are neuro-transmitters and produces them?
A chemical created by terminals.
Whats the synapse?
The space between the two neurons and will connect to another neuron and so on…
Nerves contain only _____ of the neurons.
Axons
What are nerves?
A bundle of many axons from one or many organs.
What are the 2 types of nerves?
1-Sensory Nerves (From body to spinal cord to brain)
2-Motor Nerves(From brain to spinal cord to body)
What is the brain and spinal cord bathed in?
Cerebral-spinal fluid and tissue.
The brain and spinal cord are encased in ____.
Bones.
The cerebrum is divided into how many hemispheres.
2,(right and left)
Folds divide into how many lobes?
4, (they each process different types of stimuli).
What is the cerebellum?
Balance and coordination.
What does the brain stem control?
Involuntary things.
The spiral cord is a collection of what?
Nerves, (axons).
If you cut or damage badly your spinal cord you can become _________.
Paralyzed.
What are reflexes?
Automatic and involuntary impulses.
What are reflexes controlled by?
The spinal cord.
What are spinal reflexes?
When the spinal cord needs to make a decision fast because you’re in danger.
The other involuntary reflexes/movements/things like breathing and heart rate etc is controlled by the _____.
Brain.
What Nervous system controls voluntary movements?
The somatic nervous system.
