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100
What is the Nervous system?
The control center of the body that sends and recieves electrical messages. It consists of 2 main subdivisions, the Central Nervous System and Peripheral Nervous System. The Nervous system gathers and interprets and responds to all information around the body's enviornment.
100
what is the Central Nervous System (CNS)?
Composed of the brain and spinal cord. It processes and responds to all messages from the PNS.
100
What is an interneuron?
Neurons located between sensory and motor neurons.
100
What is a motor neuron?
Neurons that recieve impulses from the brain/spinal cord to move. Also sends messages to glands.
100
What is the path during a normal stimulus response?
SENSORY NEURON-INTERNEURON-CNS-MOTOR NEURON
OR
SENSORY NEURON-INTERNEURON-CNS-INTERNEURON-MOTOR NEURON
200
What is a neuron?
A nerve cell that is specialized to recieve and conduct electrical messages (impulses). Longest cell type in the body.
200
What is the cell body of a neuron?
The large body in the center of the cell that contains organelles.
200
What is the Peripheral Nervous System?
Contains all parts of the nervous system except the brain and spinal cord. It sends electrical messages to the CNS and connects it to the body.
200
What is the spinal cord?
Part of the central nervous system. It is made of bundles of axons and neurons. The spinal cord carries impulses to the brain.
200
What is a reflex arc?
The path that reflex action occurs during stimuli.
300
What is a stimulus?
A change in the internal/external enviornment that produces a response.
300
What is the axon terminal?
Small branches at the end of an axon that passes information to other neurons.
300
What is a sensory neuron?
Neurons that gather information about what is happening around the body with the help of receptors.
300
Draw a diagram of the divisions of the nervous system
300
What is the path during a reflex arc?
SENSORY NEURON-INTERNEURON-MOTOR NEURON
400
What is a nerve?
A collection of axons bundled together with blood vessels and connective tissue. They send impulses between the CNS and PNS. The longest nerve in the body is the sciatic nerve which runs from the coccyx to the big toe of each foot.
400
What are dendrites?
Short, branched extensions of a cell where a neuron recieves information from other cells.
400
What is a receptor?
Small dendrites found on sensory neurons. Also called nerve receptors, sense receptors, or sensory receptors.
400
What is the Medulla Oblongata?
The part of the brain (brain stem) that connects to the spinal cord. It controls involuntary actions, like blood pressure, heart rate, and digestion.
400
What is the cerebrum?
The largest part of the brain that is responsible for thought and memory. It controls voluntary actions and processes impulses. The cerebrum has two hemispheres that control opposite sides of the body.
500
What is a synapse?
The space between neurons where impulses are passed between neurons.
500
What is an axon?
Elongated extensions of the neuron that carry impulses away from the cell body.
500
What is an impulse?
An electrical message carried all over the body in a giant relay race. Impulses passed from one nerve cell to another create a stimulus. IMPULSES ARE ALWAYS CARRIED FROM DENDRITE TO CELL BODY TO AXON TO AXON TERMINAL.
500
Describe the Limbic System.
A collection of structures located in the center of the brain above the medulla oblongata that processes energy and emothion. Consists of hypothalamus, amygdala, hippocampus, and thalamus.
500
What is the cerebellum?
Located under the cerebrum. It recieves and processes senssory impulses from skeletal muscles/joints. The cerebellum keeps track of the body's position and maintains balance and coordination.