Exam one material

1) Sensory neurons (AFFERENT): detect stimuli in internal or external environment and sends neuronal information to CNS for processing

• 2) Integrating interneurons
• 3) Motor Neurons (EFFERENT): motor neurons connect to skeletal muscle, cardiac muscle, or smooth muscle. Interacts with glands.

Detect stimuli or external environment and sends neuronal information to CNS for processing.

• Motor neurons connec to skeletal muscle, cardiac muscle, or smooth muscle.
• Interacts with glands.

supporting cells in the NS

Brain and spinal cord

• All neurons that extend out from the brain and spinal cord.
• -motor neurons often part of PNS

Vary their membrane potential

• Neurons
• Muscles
• Glands

information transmission can vary their membrane potential to perform their physiological function

• a) input zone
• b) integrating and trigger zone
• c) conduction zone
• d) output zone

• where the inputs arrive at the neuron and are converted to analog electrical signals (signal transduction)
• -converting NT release, change in membrane potential
• -EPSP, IPSP

• Excitatory post synaptic potential
• (+) depolarized

• Inhibitory post synaptic potential
• (-) Hyperpolarized

external Ts odorant stimuli is an example.

• Soma and axon hillock
• -Converts analog inputs from the input zone into digital signals (AP-action potentials)

AP> 1m/s or AP< 120 m/s (varies)

units of electrical currrent

impediment of current flow (Ohms)