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Anatomy.Chapter.12
Neural Tissue
Question | Answer |
---|---|
cells that send and receive signals | neurons |
cells that support and protect neurons | neuroglia (glial cells) |
Spinal Cord and brain | Central nervous system (CNS) |
Neural tissue outside the spinal cord and brain | peripheral nervous system (PNS) |
bundles of axons with connective tissues and blood vessels. Carry sensory information and motor commands in PNS | Nerves |
nerves that connect to the brain | cranial |
nerves that attach to the spinal cord | spinal |
carries sensory information from PNS sensory receptors to CNS | Afferent division |
carries motor commads from CNS to PNS muscles and glands | Efferent division |
detect changes or respond to stimuli. Neurons and specialized cells. eyes, ears | receptors |
respond to efferent signals. cells and organs | effectors |
controls skeletal muscle contractions; voluntary and involuntary muscle contractions | Somatic nervous system (SNS) |
controls subconscious actions: contractions of smooth muscle and cardiac muscle and glandular secretions | Autonomic Nervous system (ANS) |
has a stimulating effect | sympathetic division |
has a relaxing effect | parasympathetic division |
area where a neuron communicates with another cell | synapse |
contributes to half the volume of the nervous system | neuroglia |