| A | B |
|---|
Label the parts of the neuron,  | 1. cell body 2. nucleus 3. Dendrites 4. Axon 5.schwann cells 6. presynaptic terminal |
| List the five phases of an action potential | Resting Membrane potential, Depolarization, Repolarization, Hyperpolarization, Afterpotential |
| The sodium potassium pump maintains a cells ______________by pumping _____Na ions _______ of the cell and _____K ions _____ the cell | homeostasis, 3 out, 2, in |
| State the all-or-none principle of action potentials. | When a stimulus is applied to a cell, an action potential is either produced or not. If it reaches threshold then the action potential will occur. |
| Name the five functions of the nervous system | sensory input, integration, muscle and gland contraction, mental activity |
| A stimulus just strong enough to produce a maximum frequency of action potentials | maximal stimuli |
| Has many dendrites and a single axon | multipolar neuron |
| The part of the nervous system that sends information from the CNS to the effector organ | motor |
| The part of your nervous system that sends information from a sensory organ to the CNS | sensory |
| Maintains resting or vegetative functions | parasympathetic nervous division |
| Most active during physical activity | sympathetic nervous division |
| The part of the brain that contains the sensory receptors and nerves | Peripheral Nervous System |
| Produces a graded potential that is strong enough to reach threshold | threshold stimulus |
| The part of the PNS that is the involuntary system and causes the smooth muscles and glands of the body to contract and relax? | Autonomic |
| Bundle of parallel axons with myelin sheaths | White matter |
| The subdivision of the PNS that controls voluntary activities such as the activation of skeletal muscles | Somatic division |
| Has one dendrite and one axon | bipolar neuron |
| Conducts action potentials from one neuron to another | interneuron |
| The part of the nervous system that is composed of the brain and spinal cord | central Nervous system |
