Chapter 10 Vocab Flashcards
Acetylcholine
Neurotransmitter chemical released at the end of nerve cells
Afferent nerve
Carries messages TOWARD brain and spinal cord
Arachnoid membrane
Middle layer of three membranes (meninges) that surround brain and spinal cord
Astrocyte
Type of glial (neuroglial) cell that transports water and salts from capillaries
Autonomic nervous system
Nerves that control INVOLUNTARY body functions of muscles, glands and internal organs
Axon
Microscopic fibre that carries the nervous impulses along a nerve cell
Blood-brain barrier
Protective separation that makes it difficult for substances to penetrate capillary walls and enter brain
Brainstem
Posterior portion of brain connecting cerebrum with spinal cord; contains midbrain, pons, and medulla oblongata
Cauda equina
Collection of spinal nerves below the end of the spinal cord
Cell body
Part of cell containing nucleus
Central nervous system (CNS)
Brain and spinal cord
Cerebellum
Posterior part of brain; coordinates muscle movements and maintains balance
Cerebral cortex
Outer region of cerebrum containing sheets of nerve cells; grey matter of brain
Cerebrospinal fluid (CSF)
Circulates throughout brain and spinal cord
Cerebrum
Largest part of brain; responsible for VOLUNTARY muscular activity, vision, speech, hearing, thought, memory
Cranial nerves
Twelve pairs of nerves carrying messages TO and FROM brain with regard to head and neck
Dendrite
Microscopic branching fibre of nerve cell; first to receive nervous impulse
Dura mater
Thick, outermost layer of the meninges surrounding and protecting brain and spinal cord
Efferent nerve
Carries messages AWAY from brain and spinal cord; motor nerve
Ependymal cell
Glial cell; lines membranes w/in brain and spinal cord and helps form cerebrospinal fluid