Explain the factors that affect the rate of heart beat in mammals.
- Body size, small organisms have a higher heart rate than larger ones due to their higher metabolic rate
- Age; young organisms have higher metabolic rate due large surface area to volume ratio and high metabolic rate
- Environmental temperature; increase in temperature increases metabolic rate, this increase carbon dioxide concentration and heart rate
- State of health, illness may increase or decrease heart rate
- Exercise; increases metabolic rate leading to increase in heart rate in order to supply enough oxygen
- State of emotion/level of hormones increase heart rate to supply nutrients and oxygen to the brain
- Drug may increase or decrease the rate of heart beat
- Sex, heart rate is higher in males than females due to high basal metabolic rate
CATEGORIES Bio Questions and answers
TAGS Dr. Bbosa Science
