Question

Micturition takes place

• A. When stretch receptors of urinary bladder are stimulated
• B. When the brain transmits motor impulses
• C. Contraction of urinary bladder and relaxation of sphincter
• D. All of the above

Answer 1

The correct option is D

All of the above

The correct option is (D):

Explanation of the correct option:

1. Micturition is the process of urinating.
2. It involves the following stages:
   1. The urine is formed in the kidneys, by the filtration of the blood.
   2. From the kidneys the urine is stored in the urinary bladder (a bag-like structure that consists of contractile walls).
   3. When the urinary bladder become full, the sphincter muscle relaxes and the muscles of the urinary bladder contract.
   4. Then the stretch receptor of the urinary bladder gets stimulated which further sends a motor impulse to the brain to initiate the act of urination.
   5. As a result the urine stored in the urinary bladder is passed out of the body with the help of the urethra.
   6. Hence, all the above-mentioned options are correct.

Final answer:

All of the above options are correct.