group 1
Sensory and motor
What are the 2 divisions of the peripheral nervous system?
The 2 major divisions of the nervous system
What is the central nervous system and the peripheral nervous system?
Part of the nervous system includes the brain and spinal cord
What is the central nervous system?
3 types of neurons in the nervous system
What are sensory neurons, motor neurons, and interneurons?
Number of neurons the brain has
What is 100 billion?
Regulates activities that are automatic (involuntary)
What is the autonomic nervous system?
The part of the body connects the brain with the rest of the nervous system
What is the spinal cord?
Band of tissues that connects the two hemispheres together
What is the corpus collosum?
Controls blood pressure, heart rate, breathing, and swallowing
Weight of the brain
What is 1.4 kilograms, or 3 pounds?
Coordinates muscle actions, processes information about body position, and works with brain stem motor centers and cerebral cortex for motor responses
What is the cerebellum?
Relays messages, processes information, and analyses information
What is the central nervous system?
Part of the brain responsible for voluntary, or conscious activities of the body, and is the site of intelligence, learning, and judgment
What is the cerebrum
Transmitter of impulses from the central nervous system to the muscles or glands
What is the motor division of the peripheral nervous system?
Responsible for regulating activities that are under conscious control
What is the somatic nervous system?
The nervous system coordinates with all other body functions and enables the body to respond to changing conditions
How does the nervous system help the body maintain homeostasis?
Part of the nervous system that transmits impulses from organs to the central nervous system
What is the sensory division of the peripheral nervous system?
Receptors of action potential from other neurons
What are dendrites?
Name of the connective tissues that the brain and spinal cord are wrapped in
What are meninges (muh-nin-jeez)?
Where most of the metabolic activity of the cell takes place
What is the cell body?
Includes a sensory receptor, motor neuron & effector
What is the reflex arc?
When the inside of the cell temporarily becomes more positive than the outside
What is action potential?
Chemicals that are released in the synaptic cleft
What are neurotransmitters?
Gaps in the myelin sheath
What are Nodes or Ranvier?
The 2 regions of the brain stem
What are the pons and the medulla?