Reflex Arc
This type of neuron takes sensory information and activates effectors to elicit a response to a stimulus
Motor/efferent neurons
the minimum potential needed for an action potential to happen (causes the sodium channels to open)
What is Threshold Potential
What are the 4 lobes in the brain?
What is the frontal, parietal, occipital, and temporal lobe?
What are the three main functions of the nervous system?
What is sensory, integration, and motor output?
disorder characterized by multiple seizures
What is Epilepsy?
This part of reflex arc detects the stimulus ex. pain, touch, temperature.
Receptor
inside of the neuron is more negatively charged than the outside
What is Polarized?
Name the 3 layers of the meninges
nicknamed "rest and digest," helps body return to homeostasis
symptoms include muscle rigidity, tremors, changes in speech and gait
what is parkinson’s?
This type of neuron brings information to the central nervous system
What are afferent neurons?
If depolarization reaches a threshold, an action potential (impulse) is conducted
Each action potential (impulse) is conducted at maximum strength unless there are toxic materials within the cell or the membrane has been disrupted
What is the All Or None Principle?
What organs make up the central nervous system?
What is the brain and spinal cord?
made of medulla oblongata, pons and midbrain; controls breathing, regulate cardiovascular system, controls sleep/wake cycle
What is the brain stem?
also known as Lou Gehrig's disease, involves death of motor neurons
What is ALS?
Smooth, skeletal, or cardiac muscle or glands that create a response to a stimulus.
What are effectors?
stimulus signals sodium channels to open and sodium ions move into the neuron changing the membrane potential (membrane potential jumps to around +40 mV)
What is Depolarization
Whitish nervous tissue of the CNS consisting of neurons and their myelin sheaths.
What is white matter?
Large, cauliflower-like structure found inferior to the occipital lobe of the cerebrum. It provides the precise timing for coordinating skeletal muscle activity and controls balance and equilibrium. It also stores memories of previous movements.
What is the cerebellum
Autoimmune disease that attacks the myelin sheath
What is multiple sclerosis?
Point of contact between the axon terminal of one neuron and the dendrite of the receiving neuron. Area where one neuron communicates with one another.
What is the synapse?
Period where no impulse can travel along the neuron due to sodium and potassium channels “restarting” or returning to their resting state
What is the Refractory Period?
Brain and spinal cord tissue that consists of nuclei and lacks myelinated axons
What is Grey Matter?
What is the diencephalon?
neurons degenerate until they can no longer send an impulse. Characterized by memory loss
What is alzheimer’s?