Describe the impact of exercise-induced thermal stress on digestive enzyme production. (3 marks)
--- 7 WORK AREA LINES (style=lined) ---
Show Answers Only
Exercise-induced thermal stress affects digestive enzyme production by (choose 3):
- Reducing pancreatic secretion: Because blood flow diverts to working muscles, the pancreas secretes fewer digestive enzymes.
- Competing demand for blood flow: In the heat, blood is also sent to the skin for cooling, which further reduces blood flow to the gut and its enzyme-producing organs.
- Reducing digestive secretions: Fluid lost through sweating leaves less available for producing saliva and pancreatic juice.
- Slowing overall digestive processes: As the body prioritises cooling and muscle function, digestion slows.
Show Worked Solution
Exercise-induced thermal stress affects digestive enzyme production by (choose 3):
- Reducing pancreatic secretion: Because blood flow diverts to working muscles, the pancreas secretes fewer digestive enzymes.
- Competing demand for blood flow: In the heat, blood is also sent to the skin for cooling, which further reduces blood flow to the gut and its enzyme-producing organs.
- Reducing digestive secretions: Fluid lost through sweating leaves less available for producing saliva and pancreatic juice.
- Slowing overall digestive processes: As the body prioritises cooling and muscle function, digestion slows.