Quiz - 16 - Diving Knowledge Workbook - Diving Physiology

[Pedro Burrito]

From the Diving Physiology Section of the PADI Diving Knowledge Workbook Version 2.02 © PADI 2009:

Objective 2.5 - Explain the physiological mechanism that causes a "carotid-sinus reflex" and how this affects the diver.

Question 3

When the carotid-sinus receptors detect high pressure, they cause the heart to:

a. slow down.

b. speed up.

c. stop momentarily.

d. increase pressure. ​

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Thank you for your patience while we try to give people something to discuss other than Covid-19 and/or Politics. I will post the answer covered by the spoiler tag later today.

 

[Pedro Burrito]

Spoiler: Answer

a. slow down.

In essence, the brain is fooled. The pressure the receptors are sensing results from the squeeze of the hood or exposure suit, not the pressure within the artery.