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S - In the body, IgE type of antibodies ...

S - In the body, IgE type of antibodies are produced against allergens.
R- With the help of histamine and serotonin, the allergy can be removed immediately.

A

S & R are True. R is an explanation of S.

B

S & Rare True. R is not the explanation of S.

C

S is True & R is False.

D

S is False & R is True.

Text Solution

Verified by Experts

The correct Answer is:
C
S is True & R is False.
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Two bodies A and B of masses 5 kg and 10 kg in contact with each other rest on a table against a rigid wall as shown in figure. The coefficient of friction between the bodies and the table is 0.15. A force of 200 N is applied horizontally to A. What are (a) the reaction of the partition, (b) The action-reaction forces between A and B ? What happens when the wall is removed ? Does the answer to (b) change, when the bodies are in motion ? Ignore the difference between p_(s) and p_(k) .

A physical quantity is a phyical property of a phenomenon , body, or substance , that can be quantified by measurement. The magnitude of the components of a vector are to be considered dimensionally distinct. For example , rather than an undifferentiated length unit L, we may represent length in the x direction as L_(x) , and so forth. This requirement status ultimately from the requirement that each component of a physically meaningful equation (scaler or vector) must be dimensionally consistent . As as example , suppose we wish to calculate the drift S of a swimmer crossing a river flowing with velocity V_(x) and of widht D and he is swimming in direction perpendicular to the river flow with velocity V_(y) relation to river, assuming no use of directed lengths, the quantities of interest are then V_(x),V_(y) both dimensioned as (L)/(T) , S the drift and D width of river both having dimension L. with these four quantities, we may conclude tha the equation for the drift S may be written : S prop V_(x)^(a)V_(y)^(b)D^(c) Or dimensionally L=((L)/(T))^(a+b)xx(L)^(c) from which we may deduce that a+b+c=1 and a+b=0, which leaves one of these exponents undetermined. If, however, we use directed length dimensions, then V_(x) will be dimensioned as (L_(x))/(T), V_(y) as (L_(y))/(T), S as L_(x)" and " D as L_(y) . The dimensional equation becomes : L_(x)=((L_(x))/(T))^(a) ((L_(y))/(T))^(b)(L_(y))^(c) and we may solve completely as a=1,b=-1 and c=1. The increase in deductive power gained by the use of directed length dimensions is apparent. From the concept of directed dimension what is the formula for a range (R) of a cannon ball when it is fired with vertical velocity component V_(y) and a horizontal velocity component V_(x) , assuming it is fired on a flat surface. [Range also depends upon acceleration due to gravity , g and k is numerical constant]

According to Stefan's law of radiation, a black body radiates energy sigmaT^(4) from its unit surface area every second where T is the surface temperature of the black body and sigma=5.67xx10^(-8)W//m^(2)K^(4) is known as Stefan's constant. A nuclear weapon may be thought of as a ball of radius 0.5 m. When detonated, it reaches temperature of 10^(6) K and can be treated as a black body. If surrounding has water at 30^(@)C , how much water can 10% of the energy produced evaporate in 1 s ? [S_(w)=4186.0" J/kg K and "L_(v)=22.6xx10^(5)" J/kg"] .

KUMAR PRAKASHAN-HUMAN HEALTH AND DISEASE -Section - F (Multiple Choice Question) (MCQs FROM .DARPAN. BASED ON TEXTBOOK)
  1. Sporozoites puncture the cell membrane of host cell by …………….

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  2. Cryptomerozoites are products of ...........

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  3. S - In the body, IgE type of antibodies are produced against allergens...

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  4. Cirrhosis is caused due to .....

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  5. Which diseases are easily transmitted from one person to another ?

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  6. Which of the following disease is not caused due to smoking ?

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  7. The ability of the host to fight against infectious disease is decided...

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  8. Female gametocyte are recognized as .....

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  9. Which of the following is a correct statement ?

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  10. ............ is an unclear by product of Heroine.

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  11. In HIV genetic material is ........ (A) Only DNA (B) Only RNA (C)...

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  12. Incubation Period of Pneumococcal is ........ (A) One to three months...

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  13. Sometimes the own body cells attack on the body what is called it ? (...

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  14. Which of the following relieves pain and calms excitements ? (A) Mor...

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  15. ........... breaks the liver cells and comes out.

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  16. How many barriers are there in Innate immunity? (A) Two (B) Three ...

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  17. Mast cells secrete a protein which causes the dilation of blood vessel...

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  18. Which group of human becomes more inclined towards work ?

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  19. The tears falling from eyes and saliva in the mouth are which kinds of...

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  20. Assertion (A): Codeine causes addiction. Reason (R] : Codeine is an ...

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