Function of the mast cells.?

Function of the mast cells.?
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Mast cells and basophils produce the histamine, which antihistamines block. The cytoplasm of a mast cell is filled with granules containing histamine and heparin. Histamine, released after injury or infection, stimulates local inflamation. People often take antihistamines to reduce cold symptoms. Basophils, blood cells that enter damaged tissues and enhance the inflammation process, also contain granules of histamine and haparin.
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Assertion . Mast cells in human body release excessive amount of inflammatory chemicals which cause allergic reactions. Reason . Allergens in the envi

Description : Assertion . Mast cells in human body release excessive amount of inflammatory chemicals which cause allergic reactions. Reason . Allergens in the envi

Last Answer : Assertion . Mast cells in human body release excessive amount of inflammatory chemicals which cause ... If both the assertion and reason are false

Assertion :- Mast cells are undiferntiated cells of connective tissue proper. Reason :- Mast cells modified to from other cells of connective tissue p

Description : Assertion :- Mast cells are undiferntiated cells of connective tissue proper. Reason :- Mast cells modified to from other cells of connective tissue p

Last Answer : Assertion :- Mast cells are undiferntiated cells of connective tissue proper. Reason :- Mast cells ... D. If both Assertion & Reason are false.

Mast cells secrete :-

Description : Mast cells secrete :-

Last Answer : Mast cells secrete :- A. Hippurin B. Myoglobin C. Histamine D. Hemoglobin

Mast cells occur in

Description : Mast cells occur in

Last Answer : Mast cells occur in A. Connective tissue B. Epithelial tissue C. Skeletal tissue D. Nervous tissue

What are mast cells?

Description : What are mast cells?

Last Answer : .prevents the release of mast cell granules, thereby preventing release of histamine and the other chemicals contained in them. It acts as a preventive treatment if it is begun several weeks before the onset of the allergy season.

Histamine is synthesised in (A) Brain (B) Mast cells (C) Basophils (D) All of these

Description : Histamine is synthesised in (A) Brain (B) Mast cells (C) Basophils (D) All of these

Last Answer : Answer : D

IgE has a tendency to attach to (A) Basophils (B) Mast cells (C) Both (A) and (B) (D) None of these

Description : IgE has a tendency to attach to (A) Basophils (B) Mast cells (C) Both (A) and (B) (D) None of these

Last Answer : Answer : C

Cromolyn has as its major action (a) Block of calcium channels in lymphocytes (b) Block of mediator release from mast cells (c) Block of phosphodiesterase in mast cells and basophils (d) Smooth muscle relaxation in the bronchi (e) Stimulation of cortisol release by the adrenals

Description : Cromolyn has as its major action (a) Block of calcium channels in lymphocytes (b) Block of mediator release from mast cells (c) Block of phosphodiesterase in mast cells and basophils (d) Smooth muscle relaxation in the bronchi (e) Stimulation of cortisol release by the adrenals

Last Answer : Ans: B

The symptoms of allergen-mediated asthma result from which of the following? (a) Increased release of mediators from mast cells (b) Increased adrenergic responsiveness of the airways (c) Inceased vascular permeability of bronchial tissue (d) Decreased calcium influx into the mast cell (e) Decreased prostaglandin production

Description : The symptoms of allergen-mediated asthma result from which of the following? (a) Increased release of mediators from mast cells (b) Increased adrenergic responsiveness of the airways (c) ... bronchial tissue (d) Decreased calcium influx into the mast cell (e) Decreased prostaglandin production

Last Answer : Ans: A

Histamine (a) May be released from mast cells by a number of therapeutic agents (b) Causes sedation (c) Decreases the force of contraction of ventricular muscle (d) Can cause strong contractions of the gravid human uterus

Description : Histamine (a) May be released from mast cells by a number of therapeutic agents (b) Causes sedation (c) Decreases the force of contraction of ventricular muscle (d) Can cause strong contractions of the gravid human uterus

Last Answer : Ans: D

Select the correct statement about salmeterol. (a) It is a long acting selective ß2 agonist bronchodilator (b) It is a bronchodilator with anti-inflammatory property (c) It is a ß blocker that can be safely given to asthmatics (d) It is an antihistaminic with mast cells stabilizing property

Description : Select the correct statement about salmeterol. (a) It is a long acting selective ß2 agonist bronchodilator (b) It is a bronchodilator with anti-inflammatory property (c) It is a ß blocker that can be safely given to asthmatics (d) It is an antihistaminic with mast cells stabilizing property

Last Answer : Ans: A

Which of the following is a prophylactic agent that appears to stabilize mast cells? (a) Aminophyline (b) Cromolyn (c) Epinephrine (d) Ipratropium (e) Metaproterenol

Description : Which of the following is a prophylactic agent that appears to stabilize mast cells? (a) Aminophyline (b) Cromolyn (c) Epinephrine (d) Ipratropium (e) Metaproterenol

Last Answer : Ans: B

The Symptoms of allergen-mediated asthma result from which of the following? (a) Increased release of mediators from mast cells (b) Increased adrenergic responsiveness of the airways (c) Increased vascular permeability of bronchial tissue (d) Decreased calcium influx into the mast cells (e) Decreased prostaglandin production

Description : The Symptoms of allergen-mediated asthma result from which of the following? (a) Increased release of mediators from mast cells (b) Increased adrenergic responsiveness of the airways (c) ... bronchial tissue (d) Decreased calcium influx into the mast cells (e) Decreased prostaglandin production

Last Answer : Ans: A

A mast cell (or mastocyte) is a resident cells of several types of tissues and contains many granules rich in_______. a) Acetylcholine b) Nicotine c) Epinephrine d) Histamine e) Histadine

Description : A mast cell (or mastocyte) is a resident cells of several types of tissues and contains many granules rich in_______. a) Acetylcholine b) Nicotine c) Epinephrine d) Histamine e) Histadine

Last Answer : Ans: D

Methylxanthine drugs such as aminophylline cause which one of the following? (a) Vasoconstriction in many vascular beds (b) Decrease in the amount of cAMP in mast cells (c) Bronchodilation (d) Activation of the enzyme phosphodiesterase (e) Sedation

Description : Methylxanthine drugs such as aminophylline cause which one of the following? (a) Vasoconstriction in many vascular beds (b) Decrease in the amount of cAMP in mast cells (c) Bronchodilation (d) Activation of the enzyme phosphodiesterase (e) Sedation

Last Answer : Ans: C

What is the reaction-taking place when H2 receptor binds to mast cells and basophils ?

Description : What is the reaction-taking place when H2 receptor binds to mast cells and basophils ?

Last Answer : When H2 binds to mast cells and basophils it suppresses degranulation.

Asthma may be attributed to (a) inflammation of the trachea (b) accumulation of fluid in the lungs (c) bacterial infection of the lungs (d) allergic reaction of the mast cells in the lungs.

Description : Asthma may be attributed to (a) inflammation of the trachea (b) accumulation of fluid in the lungs (c) bacterial infection of the lungs (d) allergic reaction of the mast cells in the lungs.

Last Answer : (d) allergic reaction of the mast cells in the lungs.

In mammals, histamine is secreted by (a) lymphocytes (b) mast cells (c) fibroblasts (d) histiocytes.

Description : In mammals, histamine is secreted by (a) lymphocytes (b) mast cells (c) fibroblasts (d) histiocytes.

Last Answer : b) mast cells

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Description : Mast cells of connective tissue contain (a) vasopressin and relaxin (b) heparin and histamine (c) heparin and calcitonin (d) serotonin and melanin.

Last Answer : (b) heparin and histamine

Mast cells secrete (a) haemoglobin (b) hippurin (c) myoglobin (d) histamine

Description : Mast cells secrete (a) haemoglobin (b) hippurin (c) myoglobin (d) histamine

Last Answer : (d) histamine.

An essential element of all allergy reactions is the a. Release of interferons from tissue cells. b. Accumulation of ige on the surfaces of mast cells and basophils. c. Passage of igg from the immune system to local tissue cells. d. Elimination of all traces of plasma cells from the body.

Description : An essential element of all allergy reactions is the a. Release of interferons from tissue cells. b. Accumulation of ige on the surfaces of mast cells and basophils. c. Passage of igg from the immune system to local tissue cells. d. Elimination of all traces of plasma cells from the body.

Last Answer : b. Accumulation of ige on the surfaces of mast cells and basophils.

________ bind to_________ on microbial invaders. a. Toll-like receptors; PAM Ps b. Mast cells; histamine c. Toll-like receptors; complement d. Macrophages; defensins

Description : ________ bind to_________ on microbial invaders. a. Toll-like receptors; PAM Ps b. Mast cells; histamine c. Toll-like receptors; complement d. Macrophages; defensins

Last Answer : a. Toll-like receptors; PAM Ps

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 drug that can directly release histamine from mast cells without involving antigen-antibody reaction is: A. Aspirin B. Procaine C. Morphine D. Sulfadiazine

Description : The drug that can directly release histamine from mast cells without involving antigen-antibody reaction is: A. Aspirin B. Procaine C. Morphine D. Sulfadiazine

Last Answer : C. Morphine

Montelukast produces the following action(s) in bronchial asthma patients: A. Bronchodilatation B. Suppression of bronchial hyperreactivity C. Stabilization of mast cells D. Both 'A' and 'B'

Description : Montelukast produces the following action(s) in bronchial asthma patients: A. Bronchodilatation B. Suppression of bronchial hyperreactivity C. Stabilization of mast cells D. Both 'A' and 'B'

Last Answer : D. Both 'A' and 'B'

The drug that can directly release histamine from mast cells without involving antigen-antibody reaction is: A. Aspirin B. Procaine C. Morphine D. Sulfadiazine

Description : The drug that can directly release histamine from mast cells without involving antigen-antibody reaction is: A. Aspirin B. Procaine C. Morphine D. Sulfadiazine

Last Answer : C. Morphine

Zymogen cells are also called (a) Mast cells (b) Oxyntic cells (c) Chief cells (d) None of these

Description : Zymogen cells are also called (a) Mast cells (b) Oxyntic cells (c) Chief cells (d) None of these

Last Answer : (c) Chief cells

You are given money to purchase or build a seafaring vessel with a mast, which sailing vessel will you build?

Description : You are given money to purchase or build a seafaring vessel with a mast, which sailing vessel will you build?

Last Answer : A Trireme.

When flags are flown at half mast, is the US flag still displayed higher than a state flag?

Description : When flags are flown at half mast, is the US flag still displayed higher than a state flag?

Last Answer : Generally yes.

Why is a neighbor flying their US flag at half-mast?

Description : Why is a neighbor flying their US flag at half-mast?

Last Answer : He probably doesn’t realize the significance.

Why is the Post Office flying the flag at half mast today?

Description : Why is the Post Office flying the flag at half mast today?

Last Answer : Because it’s Jackson Pollock’s birthday!

What is Mast ?

Description : What is Mast ?

Last Answer : Mast means mast.

Which country's national flag is not hoisted at half-mast ?

Last Answer : The national flag is never hoisted at half-mast in Saudi Arabia.

can the American flag be flown at half mast for an individual person

Description : can the American flag be flown at half mast for an individual person

Last Answer : Don't think so. The lowering of the Flag is only authorized on Memorial Day, from sunrise until noon, and by executive order of the President, or State Governor.

Mast cell secret :-

Description : Mast cell secret :-

Last Answer : Mast cell secret :- A. Anticoagulant : Heparin B. Vasodilator : Histamine C. Vaso constrictor : Serotonin D. All of the above

What dose a flag flying at half mast signal?

Description : What dose a flag flying at half mast signal?

Last Answer : A symbol of mourning, distress and respect

What does it mean when the american flag is at half mast?

Description : What does it mean when the american flag is at half mast?

Last Answer : To honor a special day in history. For example, when someone famous dies, the flag is flown at halfmast.

Which of the following drugs is neither bronchodilator nor anti-inflammatory, but has antihistaminic and mast cell stabilizing activity ? (a) Sodium cromoglycate (b) Ketotifen (c) Beclomethasone dipropionate (d) Mepyramine maleate

Description : Which of the following drugs is neither bronchodilator nor anti-inflammatory, but has antihistaminic and mast cell stabilizing activity ? (a) Sodium cromoglycate (b) Ketotifen (c) Beclomethasone dipropionate (d) Mepyramine maleate

Last Answer : Ans: B

Allergy is immediate hypersensitivity mediated by _____and mast cell degranulation a) IgG b) IgE c) IgM d) IgA e) IgD

Description : Allergy is immediate hypersensitivity mediated by _____and mast cell degranulation a) IgG b) IgE c) IgM d) IgA e) IgD

Last Answer : Ans: B

Following is an example of preformed and not lipid derived mast cell mediator of inflammatory process (a) LTC4 (b) PGD2 (c) PAF (d) Histamine

Description : Following is an example of preformed and not lipid derived mast cell mediator of inflammatory process (a) LTC4 (b) PGD2 (c) PAF (d) Histamine

Last Answer : Ans: D

Explain in brief about leukotrienes and prostaglandins Leukotrienes and prostaglandins are formed only when the mast cell undergo degranulation and enzymatic break down of phospholipids in the plasma membrane ?

Description : Explain in brief about leukotrienes and prostaglandins Leukotrienes and prostaglandins are formed only when the mast cell undergo degranulation and enzymatic break down of phospholipids in the plasma membrane ?

Last Answer : The effects produced by them are more pronounced and long lasting than histamine. Leukotrienes mediate mucous production and bronchoconstriction. Prostaglandin D2 causes bronchoconstriction.

The following are true about the Fc regions of an immunoglobulins: a. they can be cleaved from the Fab regions by papain b. they are involved in mast cell binding c. they are involved in the activation of the complement cascade d. all above

Description : The following are true about the Fc regions of an immunoglobulins: a. they can be cleaved from the Fab regions by papain b. they are involved in mast cell binding c. they are involved in the activation of the complement cascade d. all above

Last Answer : all above

Given below is the diagrammatic sketch of a certain type of connective tissue. Identify the parts labelled A, B, C and D and select the right option about them. A B C D A B C D (a) Macrophage Fibroblast Collagen Mast fibres cell (b) Mast cell Macrophage Fibroblast Collagen fibres (c) Macrophage Collagen Fibroblast Mast cell fibres (d) Mast cell Collagen Fibroblast Macro- fibres phage

Description : Given below is the diagrammatic sketch of a certain type of connective tissue. Identify the parts labelled A, B, C and D and select the right option about them. A B C D A B C ... fibres (c) Macrophage Collagen Fibroblast Mast cell fibres (d) Mast cell Collagen Fibroblast Macro- fibres phage

Last Answer : (a) Macrophage Fibroblast Collagen Mast fibres cel

The part of a derrick crane include (i) Mast (ii) Boom (iii) Bull wheel (iv) Jack Of these statements (A) (i), (ii) and (iv) are correct (B) (ii), (iii) and (iv) are correct (C) (i), (iii) and (iv) are correct (D) (i), (ii) and (iii) are correct

Description : The part of a derrick crane include (i) Mast (ii) Boom (iii) Bull wheel (iv) Jack Of these statements (A) (i), (ii) and (iv) are correct (B) (ii), (iii) and (iv) are correct (C) (i), (iii) and (iv) are correct (D) (i), (ii) and (iii) are correct

Last Answer : (D) (i), (ii) and (iii) are correct

Centchroman is: A. An oral contraceptive for women B. An oral contraceptive for men C. A mast cell stabilizer D. A centrally acting muscle relaxant

Description : Centchroman is: A. An oral contraceptive for women B. An oral contraceptive for men C. A mast cell stabilizer D. A centrally acting muscle relaxant

Last Answer : A. An oral contraceptive for women

Select the drug that is neither bronchodilator nor antiinflammatory, but has antihistaminic and mast cell stabilizing activity: A. Sodium cromoglycate B. Ketotifen C. Beclomethasone dipropionate D. Chlorpheniramine

Description : Select the drug that is neither bronchodilator nor antiinflammatory, but has antihistaminic and mast cell stabilizing activity: A. Sodium cromoglycate B. Ketotifen C. Beclomethasone dipropionate D. Chlorpheniramine

Last Answer : B. Ketotifen

Select the correct statement about salmeterol: A. It is a long acting selective β2 agonist bronchodilator B. It is a bronchodilator with anti-inflammatory property C. It is a β blocker that can be safely given to asthmatics D. It is an antihistaminic with mast cell stabilizing property

Description : Select the correct statement about salmeterol: A. It is a long acting selective β2 agonist bronchodilator B. It is a bronchodilator with anti-inflammatory property C. It is a β blocker that can be safely given to asthmatics D. It is an antihistaminic with mast cell stabilizing property

Last Answer : A. It is a long acting selective β2 agonist bronchodilator

Write various advantages of using high mast tower lighting viz a vIz Sodium lamps in circulating areas?

Description : Write various advantages of using high mast tower lighting viz a vIz Sodium lamps in circulating areas?

Last Answer : Ans. (i) Better illumination (ii) Vide area illumination (iii)where mass public movement (iv) Where loading & unloading of materials (v) At goods coaches & passenger coaches formation, checking and maintenance.

To a person standing on shore, an object dropped from the mast of a passing sailboat will trace what path, assuming negligible air resistance. Is it: w) vertical straight line x) slanted straight line y) parabola z) hyperbola

Description : To a person standing on shore, an object dropped from the mast of a passing sailboat will trace what path, assuming negligible air resistance. Is it: w) vertical straight line x) slanted straight line y) parabola z) hyperbola

Last Answer : ANSWER: Y -- PARABOLA