Physiology of Breath-Hold Diving — Flashcards

Flashcard 1: During acclimatization at higher altitude, the sensitivity of central and peripheral chemoreceptors _____creases

Answer: in

Flashcard 2: Stimulation of nerve endings on the surface of the body by cold water causes _____ leading to Hydrocution/Immersion syndrome

Answer: vasovagal inhibition

Flashcard 3: High altitude initially causes _____ alkalosis and hypoxia, which may cause acute altitude sickness

Answer: respiratory

Flashcard 4: In response to high altitude, there is chronic hypoxic pulmonary vasoconstriction which results in pulmonary _____ and RV hypertrophy

Answer: hypertension

Flashcard 5: Cardiac arrhythmias leading to ventricular tachycardia and fibrillation are commonly seen in _____water drowning ONLY

Answer: Fresh

Flashcard 6: ascent should not be > _____ meters/day to avoid mountain sickness

Answer: 300

Extra: To prevent Acute Mountain Sickness (AMS), it is recommended that once above 3,000 meters, the sleeping altitude should not increase by more than 300 meters (1,000 feet) per day, with a rest day every 1,000 meters.

Flashcard 7: mountain sickness is seen in altitudes of >_____ meters

Answer: 2500

Extra: 

Flashcard 8: Exercise adaptation at high altitudes:_____ in pulmonary ventilation upon rising to a high altitude* blows off large quantities of CO2, reducing the PCO2

Answer: Increase

Flashcard 9: Exercise adaptation at high altitudes:To make up for the respiratory alkalosis, kidneys _____ hydrogen ion secretion and increase bicarbonate excretion.

Answer: reduce