Chap 10 Nervous System Flashcards
Nerve cells ( neurons):
- Microscopic
- Collected into macroscopic nerves.
- Carry electrical messages all over the body
General structure of the nervous system:
Two major divisions:
- Central nervous system- CNS
- Brain
- Spinal cord
- Peripheral nervous system- PNS
- Cranial nerves
- Spinal nerves
- Plexuses
- Peripheral nerves throughout the body
- Cranial nerves carry electrical impulses between the brain and the head and neck ( except the vague nerve)
- ## Spinal nerves carry impulses between the spinal cord and the chest, abdomen, and extremities
Cranial and spinal nerves:
Sensory receptor
Sensory nerves carry messages toward the brain.
Motor nerves carry messages from the brain.
Mixed nerves carry both sensory and motor fibers
Sensory receptors
Divisions of the central and peripheral nervous system:
Central nervous system:
- Brain
- Spinal cord
Peripheral nervous system:
- Cranial nerves ( 12 pairs)
- Spinal nerves (31 pairs)
- Autonomic nerves:
\+ Parasympathetic nerves
\+ Sympathetic nerves
Neuron :
Individual nerve cell.
- Dendrite
- Cell nucleus
- Axon
\+ Myelin sheath
\+ Neurilemma
- Terminal end fibers ( secrete neurotransmitters)
- Neurotransmitters transfer impulses across synapse.Glia cells
- Maintain the health of the nervous system.
- Do not transmit impulses
Hypothalamus
Brain
- Controls body temperature, sleep, appetite, sexual desire, and emotions.
- Regulates release of hormones from the pituitary gland.
- Monitors sympathetic and parasympathetic nervous system.
Brainstem:
Posterior portion of the brain that connects the cerebrum with the spinal cord.
- Pons: hoc cau
- Bridges the cerebrum and cerebellum with the rest of the brain.
- Houses nerves for the face and eyes.
The part of the brain anterior to the cerebellum and between the medulla and the rest of the midbrain.
- Medulla oblongata:
- Connects the spinal cord to the brain.
- Nerve tracts from side to side
- Regulates:
+ Blood vessels
+ Heart
+ Respiratory system
The part of the brain just above the spinal cord; controls size of blood vessels, heartbeat, breathing.
Cerebellum
- Latin for “ little brain”
- Region of the brain that plays an important role in motor control.
- It receives input from sensory systems of the spinal cord and from other parts of the brain, and integrates these inputs to fine tune motor activity.
- coordinates muscle movements and mantains balance.
Tieu nao
Acetylcholine
Neurotransmitters chemical released at the end of nerve cells.
Afferent nerve
Carries messages toward the brain and spinal cord.
Arachnoid membrane:
Middle layer of three membranes that surround the brain and spinal cord.
Mang nhen
Astrocyte
Glial cell that transports water and salts from capillaries
Te bao hinh sao
Glial cell: te bao TK dem
Axon
Microscopic fiber that carries the nervous impulses along a nerve cell
Soi truc TK
Blood-brain barriers
Protective separation between the blood and brain cell that keeps substances ( such as anticancer drugs) from penetrating capillary walls and entering the brain.
Hang rao mau nao
Cauda equina ( horse tail)
Collection of spinal nerves below the end of the spinal cord.
Cell body
The part of a nerve cell that contains the nucleus.
Than te bao
Central nervous system (CNS)
The brain and spinal cord
Cerebellum
The posterior part of the brain that coordinates muscle movements and maintains balance .
Cerebrum
The largest part of the brain; responsible for voluntary muscle activity, vision, speech, taste, hearing, thought, and memory.
Cranial nerves
Twelve pair;
Carry messages to and from the brain with regard to the head and neck ( except the vagus nerve)
Vagus nerve: day than kinh phe vi
Dendrite
Microscopic branching fiber of a nerve cell;
The first part to receive the nervous impulse
Te bao TK dang nhanh
Dura matter
The thick, outermost layer of the meninges surrounding and protecting the brain and spinal cord.
Mang cung
Efferent nerve
Carries messages away from the brain and spinal cord; motor nerve.
Ependymal cell
Glial cell that lines the membranes within the brain and spinal cord;
Helps form cerebrospinal fluid
Tb thuoc lop mang nao tuy song
Ganglion
Pl.: ganglia
Collection of nerve cell bodies in the peripheral nervous system.
Hach
Glial cell
neuroglial cell
- maintains help of nervous system.
- Supportive and connective nerve cell that does not carry nervous impulses;
Can reproduce itself.
Tb TK dem
Gyrus
Pl.: gyri
Sheet of nerve cells that produces a rounded ridge on the surface of the cerebral cortex; convolution.
Nep cuon nao
Hypothalamus
The portion of the brain beneath the thalamus;
Controls sleep, appetite, body temperature, and pituitary gland secretion
Vung nao dk than nhiet, doi, khat.
Medulla oblongata
The part of the brain just above the spinal cord;
Controls breathing, heartbeat, and size of blood vessels.
Phan cuoi nao dinh voi tuy xuong dk hoi tho, nhip tim, kich thuoc mach mau
Meninges
Three protective membranes that surround the brain and spinal cord.
Mang boc nao va tuy song
Microglial cell
Phagocytic glial cell that waste products from the central nervous system.
Tb thuoc TK trung uong
Nervous system:
- Complex: 10 billion nerve cells
- Voluntary and involuntary functions
- Carries electrical messages
- External and internal receptors
Motor nerve
Carries messages away from the brain and spinal cord to muscles and organs;
Efferent nerve
Day than kinh van dong
Myelin sheath
Covering of white fatty tissue that surrounds and insulates the axon of a nerve cell; speeds impulse conduction.
Lop ngoai te bao than kinh axon
Nerve
Macroscopic cord-like collection of fibers (axons and dendrites) that carry electrical impulses
Neurotransmitters
Chemical messenger released at the end of a nerve cell; stimulates or inhibits another cell.
Chat dan truyen TK
Oligodendroglial cell
Glial cell that forms the myelin sheath covering axons; oligodendrocyte.
Te bao dem it nhanh
Parasympathetic nerves
Involuntary, autonomic nerves that regulate normal body functions such as heart rate, breathing, and muscles of the gastrointestinal tract.
Day than kinh doi giao
Parenchyma
Essential, distinguishing tissue of any organ or system; for the nervous system, neurons and nerves that carry impulses.
Te bao nhu mo
Peripheral nervous system
Nerves outside the brain and spinal cord; cranial, spinal, and autonomic nerves.
He thong tb TK ngoai bien
Pia mater
The thin, delicate inner membrane of meninges.
Mang mem
Meninges: 3 lop mang boc nao va tuy song
Plexus
Pl.: Plexuses
A large, interlacing network of nerves
Day than kinh giao nhau
Pons
The part of the brain exterior to the cerebellum and between the medulla and the rest of the midbrain.
Hoc cau
Medulla: tuy xuong
Receptor
An organ that receives a nervous stimulus and passes it on to afferent nerves; the skin, ears, eyes, and taste buds are receptors
Co quan nhan cam
Sensory nerve
Carries messages toward the brain and spinal cord from receptors; afferent nerve.
