Nervous Tissue

Almira Coleen · 28問 · 1年前

通報

問題一覧

develops from the ECTODERM, beginning in the third week of development.

Nervous System

The precursor of the CNS

Neural Tube

Precursors for much of PNS.

Neural Crest Cells

The functional unit in both the CNS and PNS is the

Neuron

Brain and Spinal Cord.

Central Nervous System

Cranial, Spinal, and Peripheral Nerves conducting impulses to and from the CNS (Sensory and Motor Nerves) and Ganglia.

Peripheral Nervous System

Receives stimuli from environment, neurons

Dendrites

- Nutritive/ Genetic Center – Contains Nissl’s granules in the cytoplasm (RER).

Cell Body

Generates or conducts nerve impulses to other cells

Axon

Speed the impulses travel.

Myelin Sheath

Produce the myelin sheath around neuronal axons.

Schwann's Cells

Facilitate rapid conduction of nerve impulses

Node of Ranvier

Special type of intercellular junction

Chemical Synapses

Covered by three connective tissue layers __________, but contains very little collagen or fibrous tissue.

Meninges

• Myelinated axons, often grouped together as tracts, and the myelin-producing oligodendrocytes. • Contains very few neuronal cell bodies.  • Astrocytes and microglia are present.  • Found in deeper regions of the brain.

White Matter

• Unmyelinated axons that contains many neuronal cell bodies.  • It is where most synapses occur.  • It occupies the thick surface or cortex of both the cerebrum and the cerebellum.

Gray Matter

• The most conspicuous of these cells are the efferent pyramidal neurons that come in many sizes (six types of cell).  • Neurons function in the integration of sensory information and the initiation of voluntary motor responses.

CEREBRAL CORTEX

• Coordinates muscular activity throughout the body • Outer Molecular Layer.  • Central Layer of very large neurons called Purkinje Cells

CEREBELLAR CORTEX

Central Layer of very large neurons called

Purkinje Cells

PERIPHERAL

White Matter

is INTERNAL and has the general shape of the letter H.

Gray Matter

which contain motor neurons whose axons make up the ventral roots of spinal nerves.

Anterior Horns

which receive sensory fibers from neurons in the spinal (dorsal root) ganglia

Posterior Horns

Are the structure between the bone and nervous tissue that are made up of membranes of connective tissue

Meninges

• Dense, Fibroelastic Connective Tissue.  • The internal and external surface is covered by Simple squamous epithelium.  • Subdural Space.

Dura Mater

Two Components: (1) A sheet of connective tissue (avascular) in contact with the dura mater. (2) A system of loosely arranged trabeculae composed of collagen and fibroblasts, continuous with the underlying pia mater.  • Subarachnoid Space (CSF)

Arachnoid

• The innermost meninges.  • Consists of flattened, mesenchymally derived cells closely applied to the entire surface of the CNS tissue.  • Separated from the neural elements by the very thin superficial layer of astrocytic processes (the glia limitans), which adheres firmly to the pia mater.  • PHYSICAL BARRIER.  • Perivascular Spaces (Blood Vessel)

Pia Mater

• A FUNCTIONAL BARRIER that allows much tighter control than that in most tissues over the passage of substances moving from blood into the CNS tissue.  • Line by CAPILLARY ENDOTHELIUM.

Blood Brain Barrier

• component and further regulates passage of molecules and ions from blood to brain. • protects neurons and glia from bacterial toxins, infectious agents, and other exogenous substances.

Blood Brain Barrier

• Consists of highly specialized tissue with elaborate folds and many villi.  • Found in the roofs of the third and fourth ventricles and in parts of the two lateral ventricular walls.  • The function of the __________ is to remove water from blood and release it as the CSF.

Choroid Plexus

• Produce myelin sheath that provides the electrical insulation for neurons in the CNS.  • Predominant glial cell in CNS white matter

OLIGODENDROCYTES

Most abundant glial cell in the CNS.

ASTROCYTES

• Low columnar cells/ cuboidal that line the ventricles of the brain & central canal of the spinal cord.  • In some CNS locations, the apical ends of________ have cilia.  • Joined apically by junction complexes.  • No basal lamina. Instead, the basal ends of ependymal cells are elongated & extend branching processes into the adjacent neutrophil.

EPENDYMAL CELLS

• More evenly distributed throughout gray & white matter.  • Small cells with short irregular processes.  • Analyzing the treatment for damaged cells & provide immunity for invading microorganisms.  • Secrete a number of immuno-regulatory cytokines.  • Constitute the major mechanism of defense in CNS.

MICROGLIAL CELL

is a thin connective tissue layer immediately surrounding Schwann cells in peripheral nerves, containing a few non fenestrated capillaries and much reticulin.

ENDONEURIUM

Surrounds the groups of axons (with Schwann cells and endoneurium) consisting of layered, squamous fibroblastic cells joined by tight junctions to make a blood-nerve barrier. In large peripheral nerves, groups of axons are subdivided as fascicles, each of which is surrounded by _________.

PERINEURIUM

surrounds the perineurium, with thick outermost layer of DENSE IRREGULAR CONNECTIVE TISSUE.

EPINEURIUM

• Found only in PNS.  • One _________ forms myelin around a segment of one axon in contrast to the ability of oligodendrocytes

SCHWANN CELLS

• Derived from neural crest.  • Form a covering layer over the large neuronal cell bodies in PNS ganglia. • Provides nourishment for the neuron in the PNS.

SATELLITE CELLS

Introduction to Histology

Introduction to Histology

28問 • 1年前

Almira Coleen · 45問 · 1年前

Microscopy

Microscopy

45問 • 1年前

Prokaryotic and Eukaryotic Cells

Prokaryotic and Eukaryotic Cells

Almira Coleen · 36問 · 1年前

Cell

Cell

36問 • 1年前

Almira Coleen · 45問 · 1年前

Epithelial Tissue

Epithelial Tissue

45問 • 1年前

Almira Coleen · 81問 · 1年前

Connective Tissue

Connective Tissue

81問 • 1年前

Muscle Tissue

Muscle Tissue

Almira Coleen · 33問 · 1年前

Urinary System

Urinary System

33問 • 1年前

Almira Coleen · 48問 · 1年前

Endocrine Gland

Endocrine Gland

48問 • 1年前

Almira Coleen · 34問 · 1年前

Digestive System

Digestive System

34問 • 1年前

Respiratory System

Respiratory System

Almira Coleen · 40問 · 1年前

Reproductive System

Reproductive System

40問 • 1年前

Almira Coleen · 44問 · 1年前

Lab 1 - Lab Safety

Lab 1 - Lab Safety

44問 • 1年前

Almira Coleen · 17問 · 1年前

Patient Preparation

Patient Preparation

17問 • 1年前

Almira Coleen · 75問 · 1年前

Lab Safety

Lab Safety

75問 • 1年前

Almira Coleen · 54問 · 1年前

Instrumentation

Instrumentation

54問 • 1年前

Blood Collection

Blood Collection

Almira Coleen · 100問 · 1年前

Urinary System

Urinary System

100問 • 1年前

Culture and Culture Media

Culture and Culture Media

Almira Coleen · 39問 · 1年前

Introduction

Introduction

39問 • 1年前

Amniotic Fluid

Amniotic Fluid

Almira Coleen · 19問 · 1年前

Hematopoiesis 1

Hematopoiesis 1

19問 • 1年前

Mesoblastic/Mesenchymal Stage

Mesoblastic/Mesenchymal Stage

Almira Coleen · 17問 · 1年前

Hepatic/Extramedullary Stage

Hepatic/Extramedullary Stage

17問 • 1年前

Medullary/Myeloid Stage

Medullary/Myeloid Stage

Bone Marrow Components

Almira Coleen · 6問 · 1年前

Bone Marrow Components

6問 • 1年前

Almira Coleen · 25問 · 1年前

Post-Natal Hematopoiesis

Post-Natal Hematopoiesis

25問 • 1年前

Almira Coleen · 29問 · 1年前

Common Techniques in Phlebotomy

Common Techniques in Phlebotomy

29問 • 1年前

Theories of Blood Cell Production

Theories of Blood Cell Production

Almira Coleen · 20問 · 1年前

Stem Cells and Progenitors

Stem Cells and Progenitors

20問 • 1年前

Almira Coleen · 95問 · 1年前

Introduction to Bacteriology

Introduction to Bacteriology

95問 • 1年前

Almira Coleen · 67問 · 1年前

Blood Specimen Collection

Blood Specimen Collection

67問 • 1年前

General Characteristics of Blasts

General Characteristics of Blasts

Cytokine and Primary Target Cell

Cytokine and Primary Target Cell

Almira Coleen · 67問 · 1年前

Quality Management

Quality Management

67問 • 1年前

CFU-E

CFU-E

Almira Coleen · 19問 · 1年前

Quality Management (Eval)

Quality Management (Eval)

19問 • 1年前

Almira Coleen · 95問 · 1年前

Instrumentation 1

Instrumentation 1

95問 • 1年前

Almira Coleen · 10問 · 1年前

Erythrocytic Series

Erythrocytic Series

10問 • 1年前

Almira Coleen · 56問 · 1年前

Instrumentation 2

Instrumentation 2

56問 • 1年前

Almira Coleen · 102問 · 1年前

Erythrocytes

Erythrocytes

102問 • 1年前

Almira Coleen · 76問 · 1年前

Bacterial Genome

Bacterial Genome

76問 • 1年前

Almira Coleen · 33問 · 1年前

Erythrocytes 2

Erythrocytes 2

33問 • 1年前

Almira Coleen · 76問 · 1年前

Hemoglobin

Hemoglobin

76問 • 1年前

Almira Coleen · 10問 · 1年前

Natural Drugs

Natural Drugs

10問 • 1年前

Antimicrobial Agents

Antimicrobial Agents

Rubriblast / Pronormoblast / Proerythroblast

Rubriblast / Pronormoblast / Proerythroblast

Prorubicyte/ Basophilic Normoblast/ Basophilic Erythroblast

Prorubicyte/ Basophilic Normoblast/ Basophilic Erythroblast

Almira Coleen · 135問 · 1年前

Carbohydrates

Carbohydrates

135問 • 1年前

Almira Coleen · 11問 · 1年前

Rubricyte/ Polychromatophilic Normoblast / Polychromatophilic Erythroblast

Rubricyte/ Polychromatophilic Normoblast / Polychromatophilic Erythroblast

11問 • 1年前

Metarubicyte/Orthochromatic Normoblast/ Orthochromatic Erythroblast

Metarubicyte/Orthochromatic Normoblast/ Orthochromatic Erythroblast

Reticulocyte/Polychromatophilic Erythrocyte

Reticulocyte/Polychromatophilic Erythrocyte

Erythrocyte

Erythrocyte

Granulocytic Series

Granulocytic Series

Skin Puncture

Skin Puncture

Discussion

Discussion

Almira Coleen · 22問 · 1年前

Venipuncture

Venipuncture

22問 • 1年前

Almira Coleen · 10問 · 1年前

Discussion

Discussion

10問 • 1年前

Anticoagulant

Anticoagulant

Almira Coleen · 11問 · 1年前

Culture Media

Culture Media

11問 • 1年前

Allosteric Properties

Allosteric Properties

Almira Coleen · 29問 · 1年前

Biochemical Tests

Biochemical Tests

29問 • 1年前

Almira Coleen · 33問 · 1年前

Hemoglobin Derivatives

Hemoglobin Derivatives

33問 • 1年前

Almira Coleen · 25問 · 1年前

Order of the Draw

Order of the Draw

25問 • 1年前

Blood Collection

Blood Collection

Almira Coleen · 19問 · 1年前

Specimen Processing

Specimen Processing

19問 • 1年前

1. Pathways of Glucose Metabolism

1. Pathways of Glucose Metabolism

2. Regulation of Glucose Metabolism

2. Regulation of Glucose Metabolism

3. Normal and Abnormal States

3. Normal and Abnormal States

Almira Coleen · 43問 · 1年前

4. Diagnosis

4. Diagnosis

43問 • 1年前

Glucose Determination

Glucose Determination

Family Neisseriaceae

Family Neisseriaceae

N. Gonorrhoeae

N. Gonorrhoeae

Almira Coleen · 13問 · 1年前

Selective Media for N. Gonorrhoeae

Selective Media for N. Gonorrhoeae

13問 • 1年前

Laboratory Diagnosis

Laboratory Diagnosis

N. Meningiditis

N. Meningiditis

Neisseria

Neisseria

Other

Other

History and Importance

History and Importance

Primary Components in Normal Urine

Primary Components in Normal Urine

Almira Coleen · 26問 · 1年前

Urine Specimen

Urine Specimen

26問 • 1年前

Terms Related to Urine Volume

Terms Related to Urine Volume

Specimen Collection

Specimen Collection

Reagent Strip

Reagent Strip

Morphological Evaluation of RBC

Morphological Evaluation of RBC

RBC: Abnormalities - Variations in Size

RBC: Abnormalities - Variations in Size

Iron Transport in Blood

Iron Transport in Blood

Almira Coleen · 17問 · 1年前

Regulation of Body Iron

Regulation of Body Iron

17問 • 1年前