Explanation: The factors that affect the heart rate of an human is need for oxygen. If there is a need of oxygen then the heart will pump blood very fastly to meet the demand of oxygen.
When there is a normal supply of oxygen in the body then the heart pumps the blood in a normal heart rate.
Answer from: Quest
did you fail the test? xd
Answer from: Quest
photosynthesis makes the glucose that is used in cellular respiration to make atp. the glucose is then turned back into carbon dioxide, which is used in photosynthesis. while water is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form water.
Another question on Biology
Biology, 22.06.2019 01:30
Select three sports that require participants to be highly fit before the beginning a: snowboarding b: skydiving c: rock climbing d: bungee jumping e: free diving f: hiking