Recent questions tagged ch8

Obstacle to large scale transplantation of organs is

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A cell coded protein formed in response to infection with most animal viruses is

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Which one is correctly matched

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AIDS is due to

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Genes involved in cancer are

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Cells affected by leukemia are

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Shuffner's dots are related to

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Which disease is caused by a nematode

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Queen victoria was carrier of haemophilia,a ***-linked disease.What is true

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Cholera is due to

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Meningitis is a disease of

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A bacterial eye disease is

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Malarial parasite can be obtained in RBCs of patient

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Syphilis,a sexually transmitted disease,is caused by

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Chicken pox is caused by

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In sickle-cell anaemia,death occurs when lethal genes are present in

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In polio,the legs get paralysed and atrophied due to

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Mumps is viral disease that causes inflammation of

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Presence of RBC in urine is

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Which is a viral disease

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Toxin produced by tetanus affects

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Paraplegia is paralysis of

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Immune-deficiency syndrome could develop due to

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A viral disease is

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Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:Biconcave form of human RBC's is advantageous in gas exchange.}\\\text{Reason:A biconcave disc has 20-30% more surface area than a sphere.}\end{array}$

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Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:Veins which carry blood to organs other than heart are called portal system.}\\\text{Reason:Hepatic portal system is present in all vertebrates and have 2 or 3 portal systems.}\end{array}$

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Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:Bird's four chambered heart is superior to the four charbered heart of crocodiles .}\\\text{Reason:Crocodilian heart has both systemic arches joining resulting in mixing of blood in dorsal aorta.Avian heart has lost systemic arch.}\end{array}$

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Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:The S-A node acts as a pacemaker.}\\\text{Reason:The S-A node is located in the wall of the right atruim near the interatrial septun.}\end{array}$

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Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:The stem cells of bone marrow have lymphocytes and these occur in the blood,lymph and connective tissues.}\\\text{Reason:Lymphocytes migrate to bursal lymphoid tissue or to thymus and differentiate into B or T-cells.}\end{array}$

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Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:An adipose layer is absent under the skin of piokilothermic animals.}\\\text{Reason:These animals use fat in metabolism during hibernation.}\end{array}$

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Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:Veins have valve which open away from the heart.}\\\text{Reason:Veins distribute blood to the various parts.}\end{array}$

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Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:Prothrombin is essential for blood clotting.}\\\text{Reason:Prothrombin is synthesized in the liver in the presence of }Ca^{++}.\end{array}$

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Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:Peyer's patches represent an endocrine tissue.}\\\text{Reason:Peyer's patches are located on the epithelium of colon.}\end{array}$

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Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:Lymph capillaries are free and blind at one end.}\\\text{Reason:Lymph doe not flow in a circular manner.}\end{array}$

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Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:Mild fever strengthens the defence mechanism of the body.}\\\text{Reason:High temperature is harmful and should be brought down by giving antipyretics and by applying cold packs.}\end{array}$

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Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:Frequent vaginal douches should be avoided.}\\\text{Reason:Lactobacilli normally present in the ****** change glycogen of the broken off cells into lactic acid that kills foreign bacteria.}\end{array}$

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Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:Lymphocytes arise in the bone marrow and differentiate in the bursal lymphoid tissues or in the thymus into B-cells and T-cells.}\\\text{Reason:B-cells and T-cells are prepared for providing humoral and cell-mediated immunity.}\end{array}$

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Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:Aids spreads by contact between the blood of an infected person and a healthy person.}\\\text{Reason:Aids manifests as tumours or as pathogen infection.}\end{array}$

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Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:Second infection of the same pathogen is quickly eliminated.}\\\text{Reason:Performed memory B-and T-cells mount a quick and vigorous attack on pathogens re-entering the body.}\end{array}$

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Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:Interferons help eliminate viral infections..}\\\text{Reason:Interferons released cells reach the nearly uninfected cells and make them resistant to viral infection.}\end{array}$

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Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:Phagocytes capture and digest microbes.}\\\text{Reason:Killer T-cells approach the body cells covered with viruses and destroy such cells before viruses can enter and multiply to spread infection .}\end{array}$

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Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:Macrophages occur only in the connective tissue.}\\\text{Reason:Role of neutrophils is different from that of macrophages.}\end{array}$

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Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:Macrophages are multipurpose cells of the body's defence mechanism.}\\\text{Reason:They carry on phagocytosis,display the antigens of the engulfed microbes to the lymphocytes and secrete interleukin-I.}\end{array}$

asked Jul 10, 2014 by sreemathi.v

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Given the Assertion and Reason below, Choose one of the following responses $\begin{array}{1 1}\text{Assertion:Allergic persons are less likely to develop tumours than the others.}\\\text{Reason:Allergies do not run in families.}\end{array}$

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Antiviral substances are

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Viruses cannot be cultured in any artificial medium because they

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The major phagocytic cells are

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James phipps is associated with a viral disease of which has been fully eliminated from the world.It is

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On stimulation by a foreign antigen in the body,the T-lymphocytes produce by division a clone of T-cells called

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HIV attacks the

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