The wall of urinary bladder in humans shows a thick layer of smooth muscle called as

Dartos

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Detrusor

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Deltoid

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Depressor

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Solution

The correct option is B Detrusor
The wall of urinary bladder in human shows a thick layer of smooth muscle fibres, known as detrusor. It is arranged in a spiral, longitudinal and circular bundles.

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Q. The outline of principal events of urination is given below in random manner.
(i) Stretch receptors on the wall of urinary bladder send signals to the CNS.
(ii) The bladder fills with urine and becomes distended.
(iii) Micturition.
(iv) CNS passes on motor messages to initiate the contraction of smooth muscles of bladder and simultaneous relaxation of urethral sphincter.

Assertion: Smooth muscle fibres do not appear to be striated.
Reason: Striation occurs due to the regular alternate arrangement of thick and thin filaments in the smooth muscle fibre.

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The wall of urinary bladder in humans shows a thick layer of smooth muscle called as

The correct option is B DetrusorThe wall of urinary bladder in human shows a thick layer of smooth muscle fibres, known as detrusor. It is arranged in a spiral, longitudinal and circular bundles.

The correct option is B Detrusor
The wall of urinary bladder in human shows a thick layer of smooth muscle fibres, known as detrusor. It is arranged in a spiral, longitudinal and circular bundles.