LIFESCI 2L03 Study Guide - Midterm Guide: Central Nervous System, Peripheral Nervous System, Cranial Nerves

• School: McMaster University
• Department: Life Sciences
• Course: LIFESCI 2L03
• Professor: Dr. Veronica Rodriguez Moncalvo

Document Summary

Sensory nervous system a. b. sends information about the world to the cns. Sends voluntary and involuntary motor commands to the muscles. Communication between the sensory and the motor nervous system. Are bundles of axons that carry sensory information to the cns or motor information away from the cns. Spinal nerves carry both sensory and motor information. Neurons are the individual units of the nervous system. Conductive: signal travels from the cell body along the axon to a distant region in the brain/body. When the sensory neuron senses stretch in a muscle, there"s an electrical potential called the receptor potential (graded potential) - due to internal or potential called the receptor potential (graded potential) - due to internal or external stimulus. If it exceeds threshold, an action potential can be triggered. Inside of cell becomes momentarily positive compared to outside. Action potentials in skeletal muscle cause muscle contraction. Postsynaptic depolarization leads to ap in muscle cell.