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Consider the following statements each with two blanks.

(i) Annelids have __(1)___ and insects have ___(2)___ for excretion.

(ii) Blood enters the glomerulus via ___(3)___ arteriole and leaves via ___(4)___ arteriole.

(iii) During micturition, the urinary bladder ____(5)____ and the urethral sphincters ____(6)____.

Which one the following options correctly fills the blanks in any two the above statements?

Option: 1

(1)-Malpighian tubules, (2) flame cells, (5) contracts, (6) relax


Option: 2

(3)-afferent, (4)-efferent, (5)- contacts, (6)-relax


Option: 3

(1)-nephridia, (2)- Malpighian tubules, (5) relaxes, (6) contract


Option: 4

(3)-efferent, (4) afferent, (5)-relaxes, (6)-contract


Answers (1)

best_answer

As we have learnt,

 

Steps involved in micturition -

In response, the stretch receptors on the walls of the bladder send signals to the CNS. The CNS passes on motor messages to initiate the contraction of smooth muscles of the bladder and simultaneous relaxation of the urethral sphincter causing the release of urine.

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Posted by

Shailly goel

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