Question

procedures part 3: 1. for this portion of the lab you will measure your pulse while holding your breath. 2. hypothesis: how do you think holding your breath will affect your pulse rate? (1 pt) type hypothesis here → 3. while holding your breath, find your pulse and time it for 30 seconds. to find the number of beats per minute, multiply that number by 2. record your data in table 3.

Explanation:

A hypothesis for this experiment (relating breath - holding to pulse rate) can be formed based on physiological knowledge. When a person holds their breath, the body's oxygen levels start to decrease and carbon dioxide levels increase. The body's homeostatic mechanisms will try to compensate for this change. The heart rate (pulse rate) is likely to increase because the body needs to pump more blood to deliver oxygen to the tissues and remove the accumulated carbon dioxide. So a possible hypothesis is: "Holding one's breath will increase the pulse rate because the body attempts to compensate for decreased oxygen and increased carbon dioxide levels by increasing blood circulation, which is reflected in a higher pulse rate."

Answer:

Holding one's breath will increase the pulse rate because the body attempts to compensate for decreased oxygen and increased carbon dioxide levels by increasing blood circulation, which is reflected in a higher pulse rate.