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[A] : Acetylchoiine allows a nerve cell...

[A] : Acetylchoiine allows a nerve cell to com- municate chemically with a muscle cell at neuromuscular junction.
[R]: Acetyicholine diffuses across the junc- tion and binds to some receptors on mem- brane of muscle cell.

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:
A
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[A] : Upon stimulation of a muscle cell, cal- cium ions (Ca^(++)) are released from the sar- coplasmic reticulum. [R]: In reacting with a protein complex, Ca^(++) unmasks myosin binding sites on the ac-tin filaments.

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Match the terms listed under column-I with the structrues which they occur given under column-II, choose the answer which gives the correct combination of alphabets of the two columns. {:(" . Coloumn I Column II "),( " (Structrue ) (Occurrence)"),("A Haversian canal p.Kidney "),("B Debdrites q.Cartilage "),("C Sarcolemma r. Muscle "),("D. Chondrocytes s.Nerve cells "),(" t. Bone "),():} .

Match the columns {:(,"Column I " ,, "Column II") , (a , "Harversian Canal" , p , "Kidney"), (b , "Dendrites", q, "Cartilage" ), (c , "Sarcolemma" , r, "Muscle"), (d , "Chondrocytes " , s, "Nerve cells"), (- , - , t,"Bone"):}

TRUEMAN BIOLOGY-Animal Physiology -ASSERTION AND REASON
  1. [A] : Role of RBC' In CO2 transport Is primarily to form HCO3 - for c...

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  2. [A] : SA node is contraction centre or Pace Maker. [R]: Nodal fibre...

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  3. [A] : Acetylchoiine allows a nerve cell to com- municate chemically w...

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  4. A : Transmission of the nerve impulse across a synapse is accomplishe...

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  5. [A] : CO2 is mainly transported in plasma as HCO3^(-) ions [R]: Th...

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  6. [A] : Conjunctiva is composed of squamous epithelium and lines the eye...

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  7. [A] : Tympanic membrane stretching across the aperture between skull ...

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  8. Assertion : Lateral line system is found in fishes and aquatic larval ...

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  9. [A] : [A]: Parthenogenesis is a type of asexual reproduction. [R]: Bec...

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  10. [A] : Our inner ear contains sense organs for balance movement of flu...

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

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  12. [A]: Thyroid stimulating hormone is smallest peptide hormone. [R]: ...

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  13. Assertion: Aldosterone is a steroid hormone and is important in the co...

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  14. [A] : Cortisol is a protein hormone that regu- lates gluconeogenesis ...

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  15. [A]: A tadpole whose thyroid gland has been removed does not metamorph...

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  16. [A]: The regulation of RBC production is ac complished by the hormone ...

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  17. [A] : Steroid hormones are similar to choles- terol in structure. [...

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  18. [A] : The hormone aldosterone is secreted by adrenal cortex after the ...

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  19. [A] : Prostaglandins are hormone like molecules produced by many body ...

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  20. [A] : Placenta is a tissue in eutherian mam- mals that has both embryo...

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