What are Glial cells?

What are Glial cells?
by

1 Answer

Answer :

The amount of glial cells to every neuron in the nervous system is disputed. Glial cells function as support for the neurons; they produce the myelin sheath which surrounds some neurons and also form part of the blood-brain barrier. The blood-brain barrier is a structure that prevents certain substances in the bloodstream from reaching the brain. Many axons are sheathed with tubes of myelin, which is a fatty material. Myelin is produced by the glial cells. The myelin sheaths on axons have gaps, which are called the nodes of Ranvier. Myelinated sheaths help transmit information quickly and efficiently.
by

Related questions

What are six types of glial cells?

Description : What are six types of glial cells?

Last Answer : Need answer

Which of the following is not true of the blood-brain barrier: A. It is constituted by tight junctions between the endothelial cells of brain capillaries and the glial tissue B. It allows passage of lipid soluble drugs into the brain C. It limits entry of highly ionized drugs into the brain D. It regulates passage of substances from brain into blood

Description : Which of the following is not true of the blood-brain barrier: A. It is constituted by tight junctions between the endothelial cells of brain capillaries and the glial tissue B. It allows passage ... of highly ionized drugs into the brain D. It regulates passage of substances from brain into blood

Last Answer : D. It regulates passage of substances from brain into blood

Which of the following is not true of the blood-brain barrier: A. It is constituted by tight junctions between the endothelial cells of brain capillaries and the glial tissue B. It allows passage of lipid soluble drugs into the brain C. It limits entry of highly ionized drugs into the brain D. It regulates passage of substances from brain into blood

Description : Which of the following is not true of the blood-brain barrier: A. It is constituted by tight junctions between the endothelial cells of brain capillaries and the glial tissue B. It allows passage ... of highly ionized drugs into the brain D. It regulates passage of substances from brain into blood

Last Answer : D. It regulates passage of substances from brain into blood

Which of the following is not true of the blood-brain barrier: A. It is constituted by tight junctions between the endothelial cells of brain capillaries and the glial tissue B. It allows passage of lipid soluble drugs into the brain C. It limits entry of highly ionized drugs into the brain D. It regulates passage of substances from brain into blood

Description : Which of the following is not true of the blood-brain barrier: A. It is constituted by tight junctions between the endothelial cells of brain capillaries and the glial tissue B. It allows passage ... of highly ionized drugs into the brain D. It regulates passage of substances from brain into blood

Last Answer : D. It regulates passage of substances from brain into blood

Glial (pron: glee-el) cells are found in the: a) muscular system b) digestive system c) endocrine system (pron: en-de-kren) d) nervous system

Description : Glial (pron: glee-el) cells are found in the: a) muscular system b) digestive system c) endocrine system (pron: en-de-kren) d) nervous system

Last Answer : ANSWER: D -- NERVOUS SYSTEM

What is the difference between a neuron and a glial cell?

Description : What is the difference between a neuron and a glial cell?

Last Answer : A: Neurons are the primary cells of the nervous system that transmit electrical and chemical signals, while glial cells are supportive cells that provide structural and nutritional support to neurons and help regulate their activity.

What is the difference between a neuron and a glial cell?

Description : What is the difference between a neuron and a glial cell?

Last Answer : A: Neurons are specialized cells that transmit electrical and chemical signals in the nervous system, while glial cells provide support and insulation for neurons and also play a role in immune defense.

What is the difference between a neuron and a glial cell?

Description : What is the difference between a neuron and a glial cell?

Last Answer : A: Neurons are specialized cells that transmit electrical and chemical signals in the nervous system, while glial cells provide support and protection for neurons, and help to maintain the proper functioning of the nervous system.

What is the difference between a neuron and a glial cell?

Description : What is the difference between a neuron and a glial cell?

Last Answer : A: Neurons are responsible for transmitting and processing information in the nervous system, while glial cells support and protect neurons.

In most axons, the myelin sheath is interrupted at intervals of about 1 millimeter or more. These interruptions are called the: a) glial b) nodes of Ranvier (pron: ron-vee-ay) c) collaterals d) nodes of Babinet

Description : In most axons, the myelin sheath is interrupted at intervals of about 1 millimeter or more. These interruptions are called the: a) glial b) nodes of Ranvier (pron: ron-vee-ay) c) collaterals d) nodes of Babinet

Last Answer : ANSWER: B -- Nodes of Ranvier

The diagnosis of pemphigus vulgaris is confirmed by: a. Tzanck cells. b. Test dose of corticosteroid. c. Test of anti body. d. Histological immunofluorescence. e. Serological test for auto antibody.

Description : The diagnosis of pemphigus vulgaris is confirmed by: a. Tzanck cells. b. Test dose of corticosteroid. c. Test of anti body. d. Histological immunofluorescence. e. Serological test for auto antibody.

Last Answer : d. Histological immunofluorescence.

Which of the following is seen in benign mucosal membrane pemphigoid:** A. Tzanck cells B. Intraepithelial vesicles C. Histopathology like aphthous ulcer D. Scarring of the conjunctiva

Description : Which of the following is seen in benign mucosal membrane pemphigoid:** A. Tzanck cells B. Intraepithelial vesicles C. Histopathology like aphthous ulcer D. Scarring of the conjunctiva

Last Answer : D. Scarring of the conjunctiva

Which of the following elements is not found in normal periodontal membrane: A. Fibroblast B. Epithelial cells C. Erythrocytes D. Vest cells of malaise E. Inflammatory plasma cells and lymphocytes

Description : Which of the following elements is not found in normal periodontal membrane: A. Fibroblast B. Epithelial cells C. Erythrocytes D. Vest cells of malaise E. Inflammatory plasma cells and lymphocytes

Last Answer : C. Erythrocytes

The diagnosis of pemphigus vulgaris is confirmed by:** A. Tzanck cells B. Test dose of corticosteroid C. Test of anti body D. Histological immunofluorescence E. Serological test for auto antibody

Description : The diagnosis of pemphigus vulgaris is confirmed by:** A. Tzanck cells B. Test dose of corticosteroid C. Test of anti body D. Histological immunofluorescence E. Serological test for auto antibody

Last Answer : D. Histological immunofluorescence

What is the histopathology of the pathogenesis of the plaque following 21 days of plaque accumulation: A. Primarily infiltrate of plasma cells B. Primarily infiltrate of lymphocytes C. Infiltrate of plasma cells and early bone involvement D. Infiltrate of neutrophils

Description : What is the histopathology of the pathogenesis of the plaque following 21 days of plaque accumulation: A. Primarily infiltrate of plasma cells B. Primarily infiltrate of lymphocytes C. Infiltrate of plasma cells and early bone involvement D. Infiltrate of neutrophils

Last Answer : C. Infiltrate of plasma cells and early bone involvement

Which is the only dental tissue that loses its formative cells as it matures: A. Enamel B. Dentine C. Pulp D. Cementum

Description : Which is the only dental tissue that loses its formative cells as it matures: A. Enamel B. Dentine C. Pulp D. Cementum

Last Answer : A. Enamel

Which type of cells does an abscess contain: A. Mast cells B. Polymorphonuclear leukocytes C. Eosinophils D. Epithelial cells

Description : Which type of cells does an abscess contain: A. Mast cells B. Polymorphonuclear leukocytes C. Eosinophils D. Epithelial cells

Last Answer : B. Polymorphonuclear leukocytes

The commonest cells which are found in periodontal membrane are:** A. Fibroblast B. Epithelial cells C. Erythrocytes D. Vest cells of malaise

Description : The commonest cells which are found in periodontal membrane are:** A. Fibroblast B. Epithelial cells C. Erythrocytes D. Vest cells of malaise

Last Answer : A. Fibroblast

In regard to HIV infection, which of the following is the earliest finding? A. Kaposi sarcoma on the palate B. Reduced haemoglobin C. Infection with pneumocystic carinii D. Reduction in white cells count E. B cell lymphoma

Description : In regard to HIV infection, which of the following is the earliest finding? A. Kaposi sarcoma on the palate B. Reduced haemoglobin C. Infection with pneumocystic carinii D. Reduction in white cells count E. B cell lymphoma

Last Answer : D. Reduction in white cells count

Explain the left hemisphere area related to language?

Description : Explain the left hemisphere area related to language?

Last Answer : The first language area within the left hemisphere to be discovered is Broca's area, named after Paul Broca, who discovered the area while studying patients with aphasia, a language disorder. Broca's area doesn't ... the difference between "The boy was hit by the girl" and "The girl hit the boy."

Define the treatment of Muscular Dystrophy ?

Description : Define the treatment of Muscular Dystrophy ?

Last Answer : There is no specific treatment to stop or reverse any form of MD. Treatment may include physical therapy, respiratory therapy, speech therapy, orthopedic appliances used for support, and ... may need assisted ventilation to treat respiratory muscle weakness and a pacemaker for cardiac abnormalities.

Which area of the brain is related to language?

Description : Which area of the brain is related to language?

Last Answer : The two hemispheres are thought to contribute to the processing and understanding of language: the left hemisphere processes the linguistic meaning of prosody (or, the rhythm, stress, and intonation ... brains are capable of adapting to difficult circumstances, if the df.mage occurs early enough.

What are the Effects of brain damage?

Description : What are the Effects of brain damage?

Last Answer : A key source of information about the function of brain regions is the effects of damage to them. In humans, strokes have long provided a "natural laboratory" for studying the effects of brain ... often crosses into multiple regions of the brain, not along clear-cut borders, making it difficult to

Write a brief note on MEG?

Description : Write a brief note on MEG?

Last Answer : Apart from measuring the electric field around the skull it is possible to measure the magnetic field directly in a technique known asmagnetoencephalography (MEG). This technique has the same temporal ... dendrites oriented in a way that gives rise to detectable magnetic fields outside the skull.

Write a brief note on EEG?

Description : Write a brief note on EEG?

Last Answer : By placing electrodes on the scalp it is possible to record the summed electrical activity of the cortex, in a technique known aselectroencephalography (FEG). EEG measures mass changes in ... thousandths of a second. EEG recordings have good temporal resolution, but poor spatial resolution.

Explain the Functional divisions of cortex?

Description : Explain the Functional divisions of cortex?

Last Answer : Researchers who study the functions of the cortex divide it into three functional categories of regions, or areas. One consists of the primary sensory areas, which receive signals from the sensory ... and are involved in the complex process that we call perception, thought, and decision making.

Explain the structure of cerebral cortex?

Description : Explain the structure of cerebral cortex?

Last Answer : The cerebral cortex is essentially a sheet of neural tissue, folded in a way that allows a large surface area to fit within the confines of the skull. Each cerebral hemisphere, in fact, has a ... .3 square feet. Anatomists call each cortical fold asulcus, and the smooth area between folds a gyrus.

What is the dominant feature of human brain?

Description : What is the dominant feature of human brain?

Last Answer : The dominant feature of the human brain is corticalization. The cerebral cortex in humans is so large that it overshadows every other part of the brain. A few subcortical structures show alterations reflecting this ... the rat and the cat, to more complex ones, such as the chimpanzee and the human.

Write a short note on the damage and diseases of the brain?

Description : Write a short note on the damage and diseases of the brain?

Last Answer : The human brain is inclined to many types of damage and disease. The most common forms of physical damage are closed head injuries such as a blow to the head, a stroke, or poisoning by ... at least partially by brain dysfunctions, although the nature of such brain anomalies is not well understood.

What are the major tasks of brain?

Description : What are the major tasks of brain?

Last Answer : The brain performs an incredible number of tasks: It controls body temperature, blood pressure, heart rate and breathing. It accepts a flood of information about the world around you from ... skull, suspended in cerebrospinal fluid, and isolated from the bloodstream by the blood-brain barrier.

Write the names of Cerebral Cortex Lobes?

Description : Write the names of Cerebral Cortex Lobes?

Last Answer : •Frontal Lobes • Occipital Lobes •Parietal Lobes • Temporal Lobes

What is Cerebral Cortex?

Description : What is Cerebral Cortex?

Last Answer : •Outer portion (1.5mm to 5mm) of the cerebrum •Receives and processes sensory information •Divided into cerebral cortex lobes

What is Cerebellum?

Description : What is Cerebellum?

Last Answer : •Controls movement coordination •Maintains balance and equilibrium

What is Central Sulcus (Fissure of Rolando)?

Description : What is Central Sulcus (Fissure of Rolando)?

Last Answer : Central sulcus is a Deep grove that separates the parietal and frontal lobes

Explain the Broca's Area?

Description : Explain the Broca's Area?

Last Answer : Broca's area is related to Speech production and Understanding language

What are the functions of Basal Ganglia?

Description : What are the functions of Basal Ganglia?

Last Answer : Basal ganglia is Involved in cognition and voluntary movement and Diseases related to damages of this area are Parkinson's and Huntington's

Write a short note on hind brain?

Description : Write a short note on hind brain?

Last Answer : The hindbrain extends from the spinal cord and is composed of the metencephalcn andmyelencephalon. The metencephalon contains structures such as the pons and cerebellum. These regions assists in ... is responsible for controlling such autonomic functions as breathing, heart rate, and digestion.

Explain the mid brain?

Description : Explain the mid brain?

Last Answer : The midbrain and the hindbrain together make up the brainstem. The midbrain is the portion of the brainstem that connects the hindbrain and the forebrain. This region of the brain is involved in auditory and visual responses as well as motor function.

What is telencephalon?

Description : What is telencephalon?

Last Answer : The telencephalon contains the largest part of the brain, the cerebral cortex. Most of the actual information processing in the train takes place in the cerebral cortex.

What is diencephaion?

Description : What is diencephaion?

Last Answer : The diencephaion contains structures such as the thalamus and hypothalamus which are responsible for such functions as motor control, relaying sensory information, and controlling autonomic functions.

Describe the causes of Cerebral Palsy?

Description : Describe the causes of Cerebral Palsy?

Last Answer : Neural tube defects (NTDs) are one of the most common birth defects, occurring in approximately one in 1,000 live births in the United States. An NTD is an opening in the spinal cord or brain that ... to fuse and form the neural tube. When the neural tube does not close completely, an NTD develops.

What is temporal lobe?

Description : What is temporal lobe?

Last Answer : There are two temporal lobes, one on each side of the brain located at about the level of the ears. These lobes allow a person to tell one smell from another and one sound from another. They also help ... and faces). Left Lobe: Mainly involved in verbal memory (i.e., memory for words and names).

What is parital lobe?

Description : What is parital lobe?

Last Answer : One of the two parietal lobes of the brain located behind the frontal lobe at the top of the brain. The parietal lobes contain the primary sensory cortex which controls sensation (touch, pressure) ... a large association area that controls fine sensation (judgment of texture, weight, size, shape).

Explain occipital lobe?

Description : Explain occipital lobe?

Last Answer : Region in the back of the brain which processes visual information. Not only is the occipital lobe mainly responsible for visual reception, it also contains association areas that help in the visual recognition of shapes and colors. Damage to this lobe can cause visual deficits.

What is frontal lobe.

Description : What is frontal lobe.

Last Answer : Front part of the brain; involved in planning, organizing, problem solving, selective attention, personality and a variety of "higher cognitive functions" including behavior and emotions. The anterior ... produce movement are located in the motor areas. The premotor areas serve to modify movements.

What causes of Tourette syndrome (TS)?

Description : What causes of Tourette syndrome (TS)?

Last Answer : An abnormal metabolism of the neurotransmitters dopamine and serotonin are involved with the disorder. It is genetically transmitted; parents having a 50% chance of passing the gene on to their children. ... chance of displaying symptoms, boys with the gene have a 99% chance of displaying symptoms.

What is brain stem?

Description : What is brain stem?

Last Answer : The lower extension of the brain where it connects to the spinal cord. Neurological functions located in the brainstem include those necessary for survival (breathing, digestion, heart rate, blood pressure) ... up and down from peripheral nerves and spinal cord to the highest parts of the brain.

What are the Diseases of the central nervous system?

Description : What are the Diseases of the central nervous system?

Last Answer : There are many central nervous system diseases, including infections of the central nervous system such as encephalitis and poliomyelitis, neurodegenerative diseases such as Alzheimer's disease and amyotrophic ... can cause severe illness and, when malignant, can have very high mortality rates.

Write a note on Peripheral Nervous System?

Description : Write a note on Peripheral Nervous System?

Last Answer : The Peripheral Nervous System consists of all the sensory nerves and the motor nerves (these carry messages to other parts of the body from the brain and spinal cord). Sensory nerves ... (sometimes called inter neurons). Sensory, intermediate and motor nerves have gaps between them called synapses

What is thalamus?

Description : What is thalamus?

Last Answer : The thalamus is like a switching station, conducting signals from the body up to the relevant parts of the higher brain, and down from the brain to the lower brain and spinal cord.