explain how an increased pulse rate during exercise helps to maintain homeostasis in an organism.
explain how an increased pulse rate during exercise helps to maintain homeostasis in an organism.
Answer
Brief Explanations:
During exercise, cells need more energy (ATP), so cellular respiration increases, requiring more oxygen and producing more carbon dioxide. An increased pulse rate (heart rate) means the heart pumps blood faster. This speeds up the delivery of oxygen - rich blood to muscles (and other cells) and the removal of carbon dioxide - rich blood from them. Also, faster blood flow helps in transporting heat (produced during exercise) to the skin for dissipation, helping to regulate body temperature. All these processes help the organism maintain internal balance (homeostasis) by ensuring proper gas exchange, nutrient delivery, and temperature regulation.
Answer:
An increased pulse rate during exercise helps maintain homeostasis as follows: Exercise increases cellular energy demand (ATP), so cellular respiration rises, needing more $\ce{O_2}$ and producing more $\ce{CO_2}$. A higher pulse rate (faster heart pumping) accelerates the delivery of $\ce{O_2}$ - rich blood to cells (e.g., muscles) and the removal of $\ce{CO_2}$ - rich blood. It also aids in transporting excess heat (from metabolism) to the skin for cooling, ensuring proper gas exchange, nutrient supply, and temperature regulation to sustain internal balance.