ANATOMY AND PHYSIOLOGY I quiz 11 BIO201_MH_V3 (Topic 11) Functional Organization of Nervous Tissue, Complete Questions with Correct Questions Graded A+ Pass 100%

ANATOMY AND PHYSIOLOGY I quiz 11 BIO201_MH_V3 (Topic 11) Functional Organization of Nervous Tissue, Complete Questions with Correct Questions Graded A+ Pass 100% Based on the direction they transmit action potentials, what are the two subcategories of the PNS? - Answer sensory division - afferent ("toward") division; transmits action potentials from the sensory receptors in the body to the CNS motor division - efferent ("away") division; transmits action potentials from the CNS to effector organs Based on the structures they supply, what are the two subcategories of the motor division. - Answer somatic nervous system - move skeletal muscles autonomic nervous system - contractions of smooth muscle, cardiac muscle, and secretion by certain glands Classify neurons based on structure and function. - Answer Structurally: (based on the number of dendrites) - multipolar have many dendrites and a single axon (most CNS and motor neurons) - bipolar have two processes; one dendrite and one axon (some sensory organs) - pseudo-unipolar have a single process extending from the cell body which divides into two branches with one extending to the CNS and the other to the PNS (most sensory neurons) Functionally: - sensory neurons (afferent) conduct action potentials toward the CNS - motor neurons (efferent) conduct action potentials away from the CNS toward muscles or glands - interneurons conduct action potentials within the CNS from one neuron to another Compare the function of type A nerve fibers with that of types B ad C nerve fibers. - Answer type A - large-diameter myelinated axons (motor neurons supplying skeletal muscles and most sensory neurons)