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[A]: Muscle twitch is related with tetan...

[A]: Muscle twitch is related with tetanus
[R]: Tetanus is caused by many nerve im- pulses at a time.

A

If both A and R are true and R is the correct explanation of A

B

If both A and R are true but R is not the correct explanation of A

C

If A is true and R is false

D

If both A and R are false

Text Solution

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The correct Answer is:
B
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[A]: Erythroblastosis foetalis is a disease related with Rh factor and may cause death of foetus in the mother. [R]: It causes massive destruction of foetal RBCs that leads to anaemia and tissue damage of foetus.

[A]: In vertebrates, motor fibres to striped muscle, parasympathetic fibres to smooth muscle, and preganglionic sympathetic fibres are cholinergic. [R]: Cholinergic designates the type of nerve fibre that releases acetylcholine from its ending when stimulated by a nerve impulse

[A]: In low degree smoking is helpful [R]: In low doses, nicotine stimulates con- duction of nerves impulses & relaxes the muscles

[A]: Sickle-cell anaemia is a genetically de- termined disorder affecting many new born babies. [R]: It is caused by heterozygosity for allele Hb^c , producing a single amino acid substitu- tion in the a-chain of the normal haemoglo- bin molecule determined by allele Hb^A .

TRUEMAN BIOLOGY-Animal Physiology -ASSERTION AND REASON
  1. [A]: Each testis is attached to the abdominal wall by a ligament and u...

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  2. [A]: Taste buds are called the sense organs for olfaction [R]: Tas...

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  3. (A]: Little rotation and bending of the vertebral column is possible. ...

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  4. Assertion - Muscle as a whole does not obey All-or-none law. Reaso...

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  5. [A]: Generally the intraspecific competition is more intense than inte...

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  6. [A]: The tadpoles become giant tadpoles when fed on thiourea. [R]: ...

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  7. [A]: Pinna of ear is quite elastic and pliable. [R]: Pinna Qf ear ...

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  8. [A]: Muscle twitch is related with tetanus [R]: Tetanus is caused b...

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  9. [A]: Albumin is associated with oedema. [R]: It is produced by liv...

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  10. (A]: Somatomedin secreted by liver is also called IGF. [R]: Somato...

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  11. (A]: Corpus luteum is a temporary endocrine gland. [R]: Corpus lute...

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  12. (A]: Kangaroo rat can live without drinking water. [R]: This is an ...

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  13. (A]: The relationship between sucker fish and shark is considered to b...

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  14. A : Sense organs, do not interpret the stimulus, it is done by brain. ...

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  15. [A] : Hair cells on the basilar membrane are responsible for hearing....

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  16. [A] : Spermatogenesis occurs in the seminiferous tubules of the testes...

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  17. [A]: In vertebrates, motor fibres to striped muscle, parasympathetic f...

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  18. [A] : Transmission of nerve impulse across a synapse is accomplished ...

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  19. [A] : Active transport results in solute movement against a concentrat...

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  20. Statement 1 : In a Graafian follicle, the primary cell, the and the f...

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