What is Myelin Sheath ?

1 Answer

Answer :

: A layer of isolated fatty substance beneath the neurallama is called myelin sheath .

Related questions

Description : Myelin sheath is the covering of

Last Answer : Myelin sheath is the covering of A. Muscle cell B. Axon C. Blood vessels D. Osteocyte

Description : Cells which envelop nerve fibres and form myelin sheath around the axon are

Last Answer : Cells which envelop nerve fibres and form myelin sheath around the axon are

Description : Cells which envelop nerve fibres and form myelin sheath around the axon are

Last Answer : Cells which envelop nerve fibres and form myelin sheath around the axon are

Description : Phospholipids occur in (A) Myelin sheath (B) Stabilizes chylomicrans (C) Erythrocyte membrane (D) All of these

Last Answer : Answer : D

Description : What is Myelin sheath?

Last Answer : They fatty sheath covering on the axon is called Myelin sheath.

Description : Which of the following is regarded as a unit of nervous tissue? (a) Neurons (b) Myelin sheath (c) Axons (d) Dendrites

Last Answer : (a) Neurons

Description : Which of the following statement is correct for node of Ranvier of nerve? (a) Neurilemma is discontinuous. (b) Myelin sheath is discontinuous. (c) Both neurilemma and myelin sheath are discontinuous. (d) Covered by myelin sheath.

Last Answer : (b) Myelin sheath is discontinuous.

Description : Myelin sheath is produced by (a) astrocytes and Schwann cells (b) oligodendrocytes and osteoclasts (c) osteoclasts and astrocytes (d) Schwann cells and oligodendrocytes.

Last Answer : (d) Schwann cells and oligodendrocytes.

Description : Myelin sheath is produced by : (1) Astrocytes and Schwann cells (2) Oligodendrocytes and Osteoclasts (3) Osteoclasts and Astrocytes (4) Schwann cells and Oligodendrocytes

Last Answer : (4) Schwann cells and Oligodendrocytes

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

Description : What is Myelin ?

Last Answer : In most cases there is a layer of fluid between the neurilema and the axon. This layer is called myelin coating .

Description : What does the Schwann cell forms a myelin around?

Last Answer : Feel Free to Answer

Description : Do myelin sheaths slow down or speed up nerve impulses?

Last Answer : What is the answer ?

Description : Myelin?

Last Answer : DefinitionMyelin is an insulating layer that forms around nerves, including those in the brain and spinal cord. It is made up of protein and fatty substances. The purpose of the myelin sheath is ... If the myelin is damaged, the impulses slow down. This can cause diseases like multiple sclerosis.

Description : In biological studies which of the following is used to refer to the oxygen-binding, iron-containing, conjugated protein complex present in the sarcoplasm of muscle cells? a) myelin b) myosin c) myoglobin d) none of these

Last Answer : ANSWER: C -- MYOGLOBIN

Description : Myelin sheaths are found: a) surrounding tendons b) covering the brain c) covering muscles d) around axons of neurons

Last Answer : ANSWER: D -- AROUND AXONS OF NEURONS

Description : Assertion :In `C_(4)` plants, the chloroplasts of bundle sheath cells are granal. Reason: PS II is mostly found in the appressed part of granum.

Last Answer : Assertion :In `C_(4)` plants, the chloroplasts of bundle sheath cells are granal. Reason: PS II ... false. D. If both Assertion and Reason are false.

Description : In `C_(4)` plants , mesophyll cells and bundle sheath cells are specialized to perform, respectively,

Last Answer : In `C_(4)` plants , mesophyll cells and bundle sheath cells are specialized to ... and photorespiration D. Photorespiration and dark reaction

Description : Bundles of striated muscle fibres called fasciculi are surrounded by a sheath called :-

Last Answer : Bundles of striated muscle fibres called fasciculi are surrounded by a sheath called :- A. Epimysium B. Perimysium C. Exomysium D. Endomysium

Description : In Maize grain, plumule is covered by protective sheath called

Last Answer : In Maize grain, plumule is covered by protective sheath called A. Coeorhiza B. Coleoptile C. Tegmen D. Scutellum

Description : Gap between two adjacent myelinn sheath are known as

Last Answer : Gap between two adjacent myelinn sheath are known as

Description : Gap between two adjacent myelinn sheath are known as

Last Answer : Gap between two adjacent myelinn sheath are known as

Description : Write the characteristics of bundle sheath cells of `C_(4)` plants

Last Answer : Write the characteristics of bundle sheath cells of `C_(4)` plants

Description : When in plant leaves, chloroplast containing bundle sheath cells surrounds vascular bundles in several layers that anatomy is known as

Last Answer : When in plant leaves, chloroplast containing bundle sheath cells surrounds vascular bundles in several layers that anatomy is known as

Description : What is the Inflammation of the sheath surrounding a tendon is known as?

Last Answer : Need answer

Description : The white matter present in the brain and spinal cord consists of (a) neuroglia (b) myline sheath (c) terminal arborizations of axons (d) cellular sheath of Schwann

Last Answer : Ans:(b)

Description : When a bare thermocouple is covered by a protective sheath, the response becomes (A) Faster and oscillatory (B) Faster and non-oscillatory (C) Slower and oscillatory (D) Slower and non-oscillatory

Last Answer : (D) Slower and non-oscillatory

Description : The axon is covered by a fatty sheath called

Last Answer : Myelin Sheath.

Description : The parotid gland: a. contains a fascial sheath which is innervated by second cervical nerve b. receives post-ganglionic parasympathetic nerve from the otic ganglion c. contains a duct which opens ... . is composed of serous acini which contribute to the saliva e. is covered by the massenter

Last Answer : contains a fascial sheath which is innervated by second cervical nerve

Description : ______ cable consists of an inner copper core and asecond conductingouter sheath. A) Twisted-pair B) Coaxial C) Fiber-optic D) Shielded twisted-pair

Last Answer : Coaxial

Description : In C4 plants, Calvin cycle operates in (a) stroma of bundle sheath chloroplasts (b) grana of bundle sheath chloroplasts (c) grana of mesophyll chloroplasts (d) stroma of mesophyll chloroplasts.

Last Answer : (a) stroma of bundle sheath chloroplasts

Description : The CO2 fixation during C4 pathway occurs in the chloroplast of (a) guard cells (b) bundle sheath cells (c) mesophyll cells (d) spongy parenchyma.

Last Answer : (c) mesophyll cells

Description : Photosynthesis in C4 plants is relatively less limited by atmospheric CO2 levels because (a) effective pumping of CO2 into bundle sheath cells (b) RuBisCO in C4 plants has higher affinity for CO2 (c ... d) the primary fixation of CO2 is mediated via PEP carboxylase. (2005) 65. In sugarcane plant

Last Answer : (d) the primary fixation of CO2 is mediated via PEP carboxylase.

Description : In the leaves of C4 plants, malic acid formation during CO2 fixation occurs in the cells of (a) bundle sheath (b) phloem (c) epidermis (d) mesophyll.

Last Answer : (d) mesophyll.

Description : In leaves of C4 plants, malic acid synthesis during CO2 fixation occurs in (a) bundle sheath (b) guard cells (c) epidermal cells (d) mesophyll cells

Last Answer : (d) mesophyll cells.

Description : Study the pathway given below. Atmospheric CO2 mesophyll cell Bundle sheath cell Plasma- desmata Plasma membrane Cell wall HCO Phosphoenol- 3 - pyruvate Cell wall C acid ... b) Fixation Transamination Regeneration (c) Fixation Decarboxylation Regeneration (d) Carboxylation Decarboxylation Reduction

Last Answer : (c) Fixation Decarboxylation Regeneration

Description : In kranz anatomy, the bundle sheath cells have (a) thin walls, many intercellular spaces and no chloroplasts (b) thick walls, no intercellular spaces and large number of chloroplasts ... intercellular spaces and several chloroplasts (d) thick walls, many intercellular spaces and few chloroplasts

Last Answer : (b) thick walls, no intercellular spaces and large number of chloroplasts

Description : Bundle sheath cells (a) are rich in PEP carboxylase (b) lack RuBisCO (c) lack both RuBisCO and PEP carboxylase (d) are rich in RuBisCO.

Last Answer : d) are rich in RuBisCO.

Description : In double helix of DNA, the two DNA strands are (a) coiled around a common axis (b) coiled around each other (c) coiled differently (d) coiled over protein sheath.

Last Answer : (a) coiled around a common axis

Description : Which one of the following pairs of structures distinguishes a nerve cell from other types of cell? (a) Vacuoles and fibres (b) Flagellum and medullary sheath (c) Nucleus and mitochondria (d) Perikaryon and dendrites

Last Answer : d) Perikaryon and dendrites

Description : The transverse section of a plant shows following anatomical features : (i) Large number of scattered vascular bundles surrounded by bundle sheath (ii) Large conspicuous parenchymatous ground ... (a) Monocotyledonous stem (b) Monocotyledonous root (c) Dicotyledonous stem (d) Dicotyledonous root

Last Answer : (a) Monocotyledonous stem

Description : Vascular bundles in monocotyledons are considered closed because (a) there are no vessels with perforations (b) xylem is surrounded all around by phloem (c) a bundle sheath surrounds each bundle (d) cambium is absent.

Last Answer : (d) cambium is absent.

Description : The pyrenoids are made up of (a) proteinaceous centre and starchy sheath (b) core of nucleic acid surrounded by protein sheath (c) core of protein surrounded by fatty sheath (d) core of starch surrounded by sheath of protein.

Last Answer : a) proteinaceous centre and starchy sheath

Description : .Given below is the diagram of a bacteriophage. In which one of the options all the four parts A, B, C and D are correct? A B C D (a) Tail fibres Head Sheath Collar (b) Sheath Collar Head Tail fibres (c) Head Sheath Collar Tail fibres (d) Collar Tail fibres Head Sheath

Last Answer : (c) Head Sheath Collar Tail fibres

Description : The term or disease associated with buildup of fibrous plaques in the sheath of the corpus cavernosum causing curvature of the penis when it is erect is known as a) Peyronie's disease. ... refers to an uncontrolled, persistent erection of the penis occurring from either neural or vascular causes.

Last Answer : a) Peyronie’s disease. Peyronie’s disease may require surgical removal of the plaques when the disease makes sexual intercourse painful, difficult, or impossible.

Description : Which of the following methods to induce hemostasis after sheath removal post Percutaneous Transluminal Coronary Angioplasty is the least effective? a) Application of a sandbag to the area Several ... ) Application of a pneumatic compression device post PTCA has been demonstrated to be effective

Last Answer : a) Application of a sandbag to the area Several nursing interventions frequently used as part of the standard of care, such as applying a sandbag to the sheath insertion site, have not been shown to be effective in reducing the incidence of bleeding.

Description : Due to which of the following reasons the cables should not be operated too hot ? (a) The oil may loose its viscosity and it may start drawing off from higher levels (b) Expansion of the ... instability may rise due to the rapid increase of dielectric losses with temperature (e) All of the above

Last Answer : (e) All of the above

Description : The metallic sheath may be made of lead or lead alloy or of aluminium. (a) Yes (b) No

Last Answer : (b) No

Description : In a cable the voltage stress is maximum at (a) sheath (6) insulator (e) surface of the conductor (d) core of the conductor

Last Answer : (d) core of the conductor