Chapter 10 Vocab Flashcards

1
Q

Acetylcholine

A

Neurotransmitter chemical released at the end of nerve cells

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2
Q

Afferent nerve

A

Carries messages TOWARD brain and spinal cord

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3
Q

Arachnoid membrane

A

Middle layer of three membranes (meninges) that surround brain and spinal cord

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4
Q

Astrocyte

A

Type of glial (neuroglial) cell that transports water and salts from capillaries

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5
Q

Autonomic nervous system

A

Nerves that control INVOLUNTARY body functions of muscles, glands and internal organs

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6
Q

Axon

A

Microscopic fibre that carries the nervous impulses along a nerve cell

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7
Q

Blood-brain barrier

A

Protective separation that makes it difficult for substances to penetrate capillary walls and enter brain

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8
Q

Brainstem

A

Posterior portion of brain connecting cerebrum with spinal cord; contains midbrain, pons, and medulla oblongata

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9
Q

Cauda equina

A

Collection of spinal nerves below the end of the spinal cord

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10
Q

Cell body

A

Part of cell containing nucleus

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11
Q

Central nervous system (CNS)

A

Brain and spinal cord

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12
Q

Cerebellum

A

Posterior part of brain; coordinates muscle movements and maintains balance

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13
Q

Cerebral cortex

A

Outer region of cerebrum containing sheets of nerve cells; grey matter of brain

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14
Q

Cerebrospinal fluid (CSF)

A

Circulates throughout brain and spinal cord

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15
Q

Cerebrum

A

Largest part of brain; responsible for VOLUNTARY muscular activity, vision, speech, hearing, thought, memory

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16
Q

Cranial nerves

A

Twelve pairs of nerves carrying messages TO and FROM brain with regard to head and neck

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17
Q

Dendrite

A

Microscopic branching fibre of nerve cell; first to receive nervous impulse

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18
Q

Dura mater

A

Thick, outermost layer of the meninges surrounding and protecting brain and spinal cord

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19
Q

Efferent nerve

A

Carries messages AWAY from brain and spinal cord; motor nerve

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20
Q

Ependymal cell

A

Glial cell; lines membranes w/in brain and spinal cord and helps form cerebrospinal fluid

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21
Q

Ganglion

A

Collection of nerve cell bodies in the peripheral nervous system

22
Q

Glial cell

A

Supportive and connective nerve cell that does not carry nervous impulses
Can reproduce themselves, as opposed to neurons

23
Q

Gyrus

A

Sheet of nerve cells that produces a rounded ridge on the surface of the cerebral cortex; convolution

24
Q

Hypothalamus

A

Portion of the brain beneath the thalamus; controls sleep, appetite, body temp, and secretions from the pituitary gland

25
Q

Medulla oblongata

A

Part of brain above spinal cord; controls breathing, heartbeat, and the size of blood vessels; nerve fibres cross over here

26
Q

Meninges

A

Three protective membranes that surround brain and spinal cord

27
Q

Microglial cell

A

Phagocytic glial cell that removes waste products from the central nervous system

28
Q

Midbrain

A

Uppermost portion of the brain stem

29
Q

Motor nerve

A

Carries messages AWAY from the brain and spinal cord to muscles and organs; efferent nerve

30
Q

Myelin sheath

A

Covering of white fatty tissue that surrounds and insulates the axon of a nerve cell; speeds impulse conduction along axons

31
Q

Nerve

A

Macroscopic cord-like collection of fibres (axons and dendrites) that carry electrical impulses

32
Q

Neuron

A

Nerve cell that carries impulses throughout the body; parenchyma of the nervous system

33
Q

Neurotransmitter

A

Chemical messenger releases at the end of a nerve cell; stimulates or inhibits another cell, which can be a nerve, muscle or gland cell

34
Q

Oligodendroglial call

A

Glial cell that forms the myelin sheath covering axons

35
Q

Parasympathetic nerves

A

Involuntary, autonomic nerves that regulate normal body functions such as heart rate, breathing, and muscles of the gastrointestinal tract

36
Q

Parenchyma

A

Essential, distinguishing tissue of any organ or system

37
Q

Peripheral nervous system

A

Brains outside the brain and spinal cord; cranial, spinal and autonomic nerves

38
Q

Pia mater

A

Thin, delicate inner membrane of the meninges

39
Q

Plexus

A

Large, interlacing networks of nerves

40
Q

Pons

A

Part of brain anterior to the cerebellum and between the medulla and the rest of the midbrain; a bridge connecting various parts of brain

41
Q

Receptor

A

Organ that receives a nervous stimulus and passes it on the afferent nerves; skin, ears, eyes and tastes buds

42
Q

Sciatic nerve

A

Nerve extending from the base of the spine down the thigh, lower leg and foot

43
Q

Sensory nerve

A

Carries messages TOWARDS the brain and spinal cord from a receptor; afferent nerve

44
Q

Spinal nerves

A

31 pairs of nerves arising from the spinal cord

45
Q

Stimulus

A

Agent of change (light, sound, pain, etc) in the internal or external environment that provokes a response

46
Q

Stroma

A

Connective and supportive tissue of an organ

47
Q

Sulcus

A

Depression or groove in the surface of the cerebral cortex; fissure

48
Q

Sympathetic nerves

A

Autonomic nerves that influence bodily functions involuntary in times of stress

49
Q

Synapse

A

Space through which a nervous impulse travels between nerve cells or between nerve and muscle or glandular cells

50
Q

Thalamus

A

Main relay centre of brain; conducts impulses between spinal cord and cerebrum, incoming sensory messages are relayed through the thalamus to appropriate centers in the cerembrum