Neco Model Questions Vol1 2024 Biology Question 4

Blood glucose concentration regulates the secretion of insulin and glucagon.\n\n- Insulin secretion (in \(\mu\text{U·mL}^{-1}\)) increases linearly with glucose above 5 mmol·L\(^{-1}\) according to \( I = 2\,(G-5) \) for \( G>5 \); otherwise \( I = 0 \).\n- Glucagon secretion (in \(\mu\text{U·mL}^{-1}\)) decreases linearly with glucose above 7 mmol·L\(^{-1}\) according to \( Gc = 1.5\,(7-G) \) for \( G<7 \); otherwise \( Gc = 0 \).\n\nCalculate the net hormonal effect defined as \( \text{Net}= I - Gc \) (\(\mu\text{U·mL}^{-1}\)) for:\n\n(a) a post‑prandial glucose level of \( G = 9 \) mmol·L\(^{-1}\),\n(b) a fasting glucose level of \( G = 4 \) mmol·L\(^{-1}\).\nProvide the net effect for each condition.