What type of receptors embedded in the urinary bladder wall initiate the micturition reflex?

• A. Mechanoreceptors
• B. Chemoreceptors
• C. Thermoreceptors
• D. Baroreceptors

Answer: (A)

Verified step by step guidance

1. Understand the function of the urinary bladder: The urinary bladder stores urine until it is ready to be excreted from the body. The micturition reflex is the process that leads to the emptying of the bladder.
2. Identify the role of receptors in the micturition reflex: Receptors in the bladder wall detect changes that signal when the bladder is full and needs to be emptied.
3. Differentiate between types of receptors: Mechanoreceptors respond to mechanical changes such as stretch or pressure, chemoreceptors respond to chemical stimuli, thermoreceptors respond to temperature changes, and baroreceptors respond to pressure changes.
4. Relate the function of mechanoreceptors to the bladder: Mechanoreceptors in the bladder wall detect the stretching of the bladder as it fills with urine, which initiates the micturition reflex.
5. Conclude that mechanoreceptors are the type of receptors that initiate the micturition reflex, as they respond to the stretching of the bladder wall when it is full.