**Step-by-Step Solution:**
1. **Understanding Micturition**: Micturition is the process of discharging urine from the urinary bladder. It is a physiological process that involves the expulsion of urine from the body.
2. **Identifying Incorrect Options**:
- The first option mentions "removal of urea from blood," which is related to dialysis, not micturition.
- The second option refers to "removal of uric acid," which is known as uricosuria, and is also not directly related to the process of micturition.
- The last option discusses "removal of feces," which pertains to defecation, not micturition.
3. **Correct Answer**: The correct definition of micturition is "passing out urine." This is the only option that accurately describes the process.
4. **Conclusion**: Therefore, micturition is specifically the act of expelling urine from the urinary bladder.
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Micturition occurs due to
Micturition reflex is triggered by the activation of stretch receptor present on the wall of
Knowledge Check
Consider the following four statements (i).(iv) and select the option that correctly identifies the true (T) and false (F) ones. (i). Micturition is carried out by a reflex. (ii). ADH helps in water elimination making the urine hypotonic. (iii). Protein-free fluid is filtered from blood plasma into the bowman's capsule. (iv). Glucose is actively reabsorbed in the proximal convoluted tubule.
A
a) `{:("(i)","(ii)","(iii)","(iv)"),(T,F,T,T):}`
B
b) `{:("(i)","(ii)","(iii)","(iv)"),(T,T,F,F):}`
C
c) `{:("(i)","(ii)","(iii)","(iv)"),(F,F,F,T):}`
D
d) `{:("(i)","(ii)","(iii)","(iv)"),(F,T,F,T):}`
Assertion: During micturition, urine is prevented from flowing back into the ureters. Reason: Urethral sphincters contract during micturition
A
If both assertion and reason are true and reason is the correct explanation of assertion
B
if both assertion and reason are true but reason is not the correct explanation of assertion.
C
if assertion is true but reason is false
D
if both assertion and reason are false.
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If stretch receptors in wall of urinary bladder are destroyed (a) Micturition reflex occurs normally (b) Filling at bladder remains unaffected (c) Person has to undergo hemodialysis (d) Formation of one comes to a halt
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. The correct sequence of the event is
In micturition
In micturition
Parasympathetic activity during micturition causes :-
Which of the following is not associated with micturition reflex?
