Question

In today’s lab, you will design an experiment to differentiate between the stimuli that trigger the physiological responses comprising the MDR. You will examine how cold, apnea, and cold + apnea stimuli influence the MDR and blood oxygen levels, as compared to baseline, and describe the magnitude of the evoked response. In order to study the effect of one stimulus (cold or apnea), you must control for (or eliminate) the other stimuli during testing.

Remember, in this lab we will examine how cold, apnea, and cold + apnea stimuli influence the MDR. In order to study the effect of one stimulus (cold or apnea), we must control for (or eliminate) the other stimulus during testing.

Which of the following conditions would create a similar type of control condition to submerging your face in warm water. Choose ANY that apply.

a. Hunched over basin without submerging face

b. Hunched over basin without submerging face while holding breath.

c. SCUBA mask alone with face immersed in cold water

d. SCUBA snorkel alone with face immersed in warm water

e. SCUBA mask and snorkel with face immersed in warm water

f. SCUBA mask and snorkel with face immersed in cold water

Which of the following conditions would create a similar type of control condition to submerging your face in cold water while wearing SCUBA mask and snorkel. Choose ANY that apply.

a. Hunched over basin without submerging face

b. Hunched over basin without submerging face while holding breath.

c. SCUBA mask alone with face immersed in cold water

d. SCUBA snorkel alone with face immersed in warm water

e. SCUBA mask and snorkel with face immersed in warm water

f. Submerging face in warm water.

Answer 1

1.

c. SCUBA mask alone with face immersed in cold water.

This is because when the face is immersed in warm water, there are 2 things at play; Apnea and facial stimulation by water. Only in the option c both apnea a water in contact with face are present.

2.

d. SCUBA snorkel alone with face immersed in warm water

e. SCUBA mask and snorkel with face immersed in warm water

This is because in these control condition there is no apnea created however there is stimulation of face with water. However the difference in temperature of the water does not have any significance on the heart rate.