AI Homeostasis and Feedback Mechanisms Flashcard

Front

Primary function of feedback mechanisms in homeostasis?

Back

Maintain stable internal environment

Answer explanation

The primary function of feedback mechanisms is to maintain a stable internal environment, ensuring that physiological processes remain balanced despite external changes.

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DOK Level 3: Strategic Thinking

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Front

Example of negative feedback in the body:

Back

Regulation of blood glucose levels

Answer explanation

Regulation of blood glucose levels is a negative feedback mechanism where insulin lowers blood sugar when it's high, and glucagon raises it when it's low, maintaining balance. The other options are examples of positive feedback.

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DOK Level 3: Strategic Thinking

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Front

Body's response to increased blood glucose after a meal:

Back

Pancreas releases insulin.

Answer explanation

After a meal, increased blood glucose levels trigger the pancreas to release insulin. Insulin helps cells absorb glucose for energy and signals the liver to store excess glucose, lowering blood sugar levels.

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DOK Level 3: Strategic Thinking

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Front

Hormone released by pancreas when blood sugar is low.

Back

Glucagon

Answer explanation

When blood sugar levels are low, the pancreas releases glucagon. This hormone signals the liver to convert stored glycogen into glucose, raising blood sugar levels. Insulin, on the other hand, lowers blood sugar.

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DOK Level 3: Strategic Thinking

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Front

Body's temperature regulation during exercise:

Back

Sweating

Answer explanation

During exercise, the body generates heat, and to maintain homeostasis, it primarily cools itself by sweating. Sweating allows for evaporative cooling, effectively regulating body temperature, unlike shivering, which generates heat.

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DOK Level 3: Strategic Thinking

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Front

Feedback mechanism when body temp rises:

Back

Activates sweat glands.

Answer explanation

When body temperature rises, the body activates sweat glands to increase perspiration. This process cools the body through evaporation, helping to restore normal temperature, making it the correct response.

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DOK Level 3: Strategic Thinking

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Front

Homeostasis in blood pressure regulation involves:

Back

Kidneys excrete more water to lower blood pressure.

Answer explanation

The kidneys help regulate blood pressure by excreting excess water, which decreases blood volume and subsequently lowers blood pressure. This is a key mechanism in maintaining homeostasis.

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DOK Level 3: Strategic Thinking

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Front

Body maintains homeostasis when blood pH is too acidic by:

Back

Increasing breathing rate to expel more CO2

Answer explanation

The body maintains homeostasis by increasing the breathing rate to expel more CO2, which helps raise blood pH levels back to normal. This response counteracts acidity effectively.

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DOK Level 3: Strategic Thinking

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Front

How could you investigate feedback mechanisms in body temperature regulation.

Back

Monitor sweat production in varying temperatures.

Answer explanation

Monitoring sweat production in different temperatures effectively demonstrates feedback mechanisms in thermoregulation. As temperature rises, sweat production increases to cool the body, illustrating homeostasis in action.

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DOK Level 3: Strategic Thinking

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Front

Organ system that transports nutrients and oxygen to cells.

Back

Circulatory system

Answer explanation

The circulatory system is responsible for transporting nutrients and oxygen to cells throughout the body via blood. The digestive system breaks down food, the respiratory system facilitates gas exchange, and the nervous system controls body functions.