Seeley's Anatomy and Physiology chapter 11 Questions With Answers

Seeley's Anatomy and Physiology chapter 11
Questions With Answers

Major functions of nervous system Receiving sensory input, integrating information,

controlling muscles and glands, maintaining homeostasis, establishing and maintaining mental

activity




Central nervous system CNS, consists of the brain and the spinal cord




Peripheral nervous system PNS, consists of all the nervous tissue external to the CNS




Sensory receptors The endings of neurons, or separate, specialized cells that detect

temperature, pain, touch, pressure, light, sound, odor, and other stimuli




Nerve A bundle of axons and their sheaths, it connects the CNS to sensory receptors,

muscles, and glands




Cranial nerves Nerves that originate from the brain, 12 pairs




Spinal nerves Nerves that originate from the spinal cord, 31 pairs

, Seeley's Anatomy and Physiology chapter 11
Questions With Answers

Ganglion A collection of neuron cell bodies located outside the CNS




Plexus An extensive network of axons and, in some cases, neuron cell bodies, located

outside the CNS




Sensory division Afferent division. Transmits electrical signals from the sensory receptors

to the CNS, functional subdivision of the PNS




Motor division Efferent division. Transmits action potentials from the CNS to efferent

organs, such as muscles and glands, functional subdivision of the PNS




Somatic nervous system SNS, controls conscious activities




Autonomic nervous system ANS, controls subconscious activities




Sympathetic division Subdivision of ANS, most active during physical activity