Unit 7E Flashcards
What are the 2 things that the nervous system is divided into?
Peripheral nervous system and central nervous system
What is the PNS made of
Made of communication pathways that connect all areas of the body to the cns
Nerves
Communication pathways in the body.
Also are axons bundles together with BV and connective tissue
Neurons
Specialized cells that transfer messages in the form of fast- moving electrical signals
Impulses
Electrical signals
What does the neuron structure consist of?
Cell body, dendrites, and axons
Cell body
The region in the center that contains a nucleus and cell organelles
Dendrites
Where a neuron receives info from other cells through short, branches extensions
Axon
Fiber where info is transmitted to other cells
What are the 2 types of nerve cells
Sensory neurons, and motor neurons
Sensory neurons
Gathers info about what is happening around your body
Receptors
Specialized structures that detect changes inside and outside the body
Motor neurons
Send impulses from the brain and spinal cord to other systems
Where do motor neurons send messages to ?
Sweat glands and muscles
CNS connects to the …….
Rest of the body via nerves
What does the central nervous recieve?
Information from sensory neurons and responds by sending messages throughout the body through motor neurons in the PNS
Parts of CNS include
Brain, spinal cord
Three main parts of brain
Cerebrum,
Cerebellum,
Medulla
The brain is the ________ organ in the CNS
Largest
Many processes controlled by the brain are
Involuntary
Left hemisphere
Directs the right side of body: verbal, analytical, logical
Right hemisphere
Directs left side of body: nonverbal, artistic, creative