Question

tasks 3: explain how negative feedback maintains homeostasis in one of these systems: body temperature, blood glucose after a meal, or plant water balance (stomata). in your answer, name the stimulus, what the effectors do, and how the condition moves back toward a set point. success checklist: names the stimulus (what changed) states the effector response says it returns toward the set point (negative feedback)

Explanation:

For blood - glucose regulation after a meal: The stimulus is an increase in blood glucose levels due to digestion and absorption of carbohydrates from the meal. The effector is the pancreas, which secretes insulin. Insulin promotes the uptake of glucose by cells (such as muscle, fat, and liver cells), where it is either used for energy or stored as glycogen. This reduces the blood - glucose levels back towards the normal set - point. For body temperature: If the body temperature rises (stimulus), effectors like blood vessels near the skin dilate (vasodilation) to increase heat loss through radiation, and sweat glands secrete sweat which evaporates and cools the body, bringing the temperature back to the set - point. For plant water balance (stomata): When the plant has sufficient water (stimulus), stomata open to allow gas exchange for photosynthesis. When water is scarce, abscisic acid signals cause the stomata to close, reducing water loss through transpiration and bringing the plant's water balance back towards the set - point.

Answer:

For blood glucose after a meal: Stimulus is increased blood glucose from meal. Effector is the pancreas secreting insulin. It returns blood glucose to set - point by promoting glucose uptake by cells.
For body temperature: Stimulus is increased body temperature. Effectors are blood vessels (vasodilation) and sweat glands (sweating). It returns body temperature to set - point by heat loss mechanisms.
For plant water balance (stomata): Stimulus is water availability. Effectors are stomata. When water is scarce, stomata close to return water balance to set - point.