AP Biology Flashcards: Feedback

What this deck covers

This deck focuses on Feedback, giving you a quick way to review the definitions, rules, and examples that matter most for AP Biology.

How to use these flashcards

Work through these flashcards in short sessions. Try to answer each prompt before flipping the card, then revisit any cards you miss until the explanation feels automatic.

Flashcard 1: What feedback type is involved in the regulation of calcium levels in the blood?

Answer: Negative feedback. PTH and calcitonin maintain proper calcium balance.

Flashcard 2: What is the primary effect of positive feedback on system stability?

Answer: It destabilizes the system by amplifying changes. It accelerates change until completion or external stop.

Flashcard 3: Which feedback mechanism is primarily responsible for maintaining homeostasis?

Answer: Negative feedback. It counteracts changes to maintain stable internal conditions.

Flashcard 4: What feedback type involves a stimulus that initiates reactions that reduce the stimulus?

Answer: Negative feedback. The response counteracts and reduces the original stimulus.

Flashcard 5: What is the feedback type: Inflammatory response amplifies to fight infection?

Answer: Positive feedback. More immune cells recruit additional inflammatory responses.

Flashcard 6: Which hormone is involved in positive feedback during childbirth?

Answer: Oxytocin. It stimulates stronger uterine contractions during labor.

Flashcard 7: State the feedback type: Blood clotting involves a cascade of reactions.

Answer: Positive feedback. Each clotting factor activates the next in sequence.

Flashcard 8: What is the definition of negative feedback in biological systems?

Answer: Negative feedback reduces output to stabilize the system. This maintains homeostasis by counteracting deviations.

Flashcard 9: Which hormone is involved in positive feedback during childbirth?

Answer: Oxytocin. It stimulates stronger uterine contractions during labor.

Flashcard 10: What is the role of feedback mechanisms in biological systems?

Answer: To regulate and maintain stability within the system. They ensure optimal conditions for cellular processes.

Flashcard 11: What feedback type is involved in the regulation of calcium levels in the blood?

Answer: Negative feedback. PTH and calcitonin maintain proper calcium balance.

Flashcard 12: Identify the feedback type: Increased blood CO2 levels trigger breathing rate increase.

Answer: Negative feedback. Higher CO2 stimulates breathing to restore normal levels.

Flashcard 13: Identify the feedback type: Regulation of blood osmolarity by ADH.

Answer: Negative feedback. ADH release responds to blood concentration changes.

Flashcard 14: Which feedback type is associated with processes that need rapid completion?

Answer: Positive feedback. It accelerates processes that must reach completion quickly.

Flashcard 15: What feedback type is involved in the process of labor and delivery?

Answer: Positive feedback. Contractions intensify through oxytocin release cycles.

Flashcard 16: Identify the feedback type: Maintenance of blood pH through bicarbonate buffer system.

Answer: Negative feedback. Buffers oppose pH changes to maintain acid-base balance.

Flashcard 17: What feedback type is used in the regulation of blood pressure?

Answer: Negative feedback. Baroreceptors detect changes and trigger opposing responses.

Flashcard 18: What is the role of feedback mechanisms in biological systems?

Answer: To regulate and maintain stability within the system. They ensure optimal conditions for cellular processes.

Flashcard 19: Identify the feedback mechanism: Withdrawal reflex from a hot surface.

Answer: Negative feedback. Pain signals trigger immediate protective muscle response.

Flashcard 20: What feedback type is involved in lactation after childbirth?

Answer: Positive feedback. Suckling stimulates more milk production and release.

Flashcard 21: Identify an example of positive feedback in human physiology.

Answer: Oxytocin release during childbirth. Stronger contractions stimulate more hormone release.

Flashcard 22: What is the definition of positive feedback in biological systems?

Answer: Positive feedback amplifies changes to drive processes forward. This accelerates processes until completion or external intervention.

Flashcard 23: Which feedback mechanism is primarily responsible for maintaining homeostasis?

Answer: Negative feedback. It counteracts changes to maintain stable internal conditions.

Flashcard 24: What feedback type occurs during an immune response to infection?

Answer: Positive feedback. Inflammation amplifies to recruit more immune cells.

Flashcard 25: Choose the feedback type: Fever enhances immune response by raising body temperature.

Answer: Positive feedback. Higher temperature enhances immune cell activity against pathogens.

Flashcard 26: What is the feedback type: Insulin secretion lowers blood glucose levels.

Answer: Negative feedback. The hormone response opposes the initial glucose increase.

Flashcard 27: Identify the feedback type: Contractions increase during childbirth due to hormone release.

Answer: Positive feedback. Oxytocin release increases as contractions strengthen.

Flashcard 28: Which feedback type is primarily used in the endocrine system to regulate hormones?

Answer: Negative feedback. Hormone levels inhibit their own further release.

Flashcard 29: Identify an example of negative feedback in human physiology.

Answer: Body temperature regulation via thermoregulation. Heat production/loss mechanisms maintain constant core temperature.

Flashcard 30: What feedback type involves a stimulus that initiates reactions that reduce the stimulus?

Answer: Negative feedback. The response counteracts and reduces the original stimulus.

Flashcard 31: Identify the feedback type: Maintenance of blood pH through bicarbonate buffer system.

Answer: Negative feedback. Buffers oppose pH changes to maintain acid-base balance.

Flashcard 32: State the feedback type: Blood clotting involves a cascade of reactions.

Answer: Positive feedback. Each clotting factor activates the next in sequence.

Flashcard 33: What feedback type is involved in the process of blood clot formation?

Answer: Positive feedback. Clotting factors activate each other in amplifying cascade.

Flashcard 34: What feedback type helps to restore a system to its set point after a disturbance?

Answer: Negative feedback. The response opposes the deviation from normal.

Flashcard 35: What is the primary effect of positive feedback on system stability?

Answer: It destabilizes the system by amplifying changes. It accelerates change until completion or external stop.

Flashcard 36: Identify an example of negative feedback in human physiology.

Answer: Body temperature regulation via thermoregulation. Heat production/loss mechanisms maintain constant core temperature.

Flashcard 37: Which feedback type is associated with processes that need rapid completion?

Answer: Positive feedback. It accelerates processes that must reach completion quickly.

Flashcard 38: Which feedback type is typically associated with homeostatic processes?

Answer: Negative feedback. It opposes deviations to maintain steady states.

Flashcard 39: What is the definition of positive feedback in biological systems?

Answer: Positive feedback amplifies changes to drive processes forward. This accelerates processes until completion or external intervention.

Flashcard 40: Identify the feedback type: Contractions increase during childbirth due to hormone release.

Answer: Positive feedback. Oxytocin release increases as contractions strengthen.

Flashcard 41: What is the definition of negative feedback in biological systems?

Answer: Negative feedback reduces output to stabilize the system. This maintains homeostasis by counteracting deviations.

Flashcard 42: What type of feedback mechanism is involved in blood glucose regulation?

Answer: Negative feedback. Insulin and glucagon oppose each other to maintain balance.

Flashcard 43: What is the feedback type: Insulin secretion lowers blood glucose levels.

Answer: Negative feedback. The hormone response opposes the initial glucose increase.

Flashcard 44: What feedback type is used in the regulation of blood pressure?

Answer: Negative feedback. Baroreceptors detect changes and trigger opposing responses.

Flashcard 45: Identify the feedback type: Blood vessels constrict when cold to conserve heat.

Answer: Negative feedback. Vasoconstriction reduces heat loss from the body surface.

Flashcard 46: Which feedback type is more likely to lead to a runaway process?

Answer: Positive feedback. It continues accelerating until external factors intervene.

Flashcard 47: Which feedback type acts as a self-regulating mechanism?

Answer: Negative feedback. It automatically opposes deviations without external control.

Flashcard 48: Identify the feedback mechanism: Withdrawal reflex from a hot surface.

Answer: Negative feedback. Pain signals trigger immediate protective muscle response.

Flashcard 49: What feedback type is involved in the process of blood clot formation?

Answer: Positive feedback. Clotting factors activate each other in amplifying cascade.

Flashcard 50: What feedback type occurs when a system moves away from equilibrium?

Answer: Positive feedback. The response amplifies rather than stabilizes the change.

Flashcard 51: Which feedback type is primarily used in the endocrine system to regulate hormones?

Answer: Negative feedback. Hormone levels inhibit their own further release.

Flashcard 52: What feedback type is involved in the process of labor and delivery?

Answer: Positive feedback. Contractions intensify through oxytocin release cycles.

Flashcard 53: What term describes the process where feedback reduces the deviation from a set point?

Answer: Negative feedback. The response opposes the initial change from normal.

Flashcard 54: What type of feedback mechanism is involved in blood glucose regulation?

Answer: Negative feedback. Insulin and glucagon oppose each other to maintain balance.

Flashcard 55: Choose the feedback type: Fever enhances immune response by raising body temperature.

Answer: Positive feedback. Higher temperature enhances immune cell activity against pathogens.

Flashcard 56: Identify the feedback mechanism: Sweating to reduce body temperature.

Answer: Negative feedback. Evaporative cooling opposes temperature increase.

Flashcard 57: Identify the feedback type: Increased body temperature triggers cooling mechanisms.

Answer: Negative feedback. Heat activates cooling mechanisms like sweating.

Flashcard 58: What term describes the process where feedback reduces the deviation from a set point?

Answer: Negative feedback. The response opposes the initial change from normal.

Flashcard 59: State the feedback type: Shivering increases when body temperature drops.

Answer: Negative feedback. Muscle activity generates heat to counteract cold.

Flashcard 60: State the feedback type: Amplification of a signal leads to increased response.

Answer: Positive feedback. The response enhances rather than opposes the stimulus.

Flashcard 61: Identify the feedback type: Increased blood CO2 levels trigger breathing rate increase.

Answer: Negative feedback. Higher CO2 stimulates breathing to restore normal levels.

Flashcard 62: What feedback type helps to restore a system to its set point after a disturbance?

Answer: Negative feedback. The response opposes the deviation from normal.

Flashcard 63: State the feedback type: Shivering increases when body temperature drops.

Answer: Negative feedback. Muscle activity generates heat to counteract cold.

Flashcard 64: What feedback type is involved in lactation after childbirth?

Answer: Positive feedback. Suckling stimulates more milk production and release.

Flashcard 65: What feedback type occurs during an immune response to infection?

Answer: Positive feedback. Inflammation amplifies to recruit more immune cells.

Flashcard 66: Identify the feedback type: Blood vessels constrict when cold to conserve heat.

Answer: Negative feedback. Vasoconstriction reduces heat loss from the body surface.

Flashcard 67: Which feedback type acts as a self-regulating mechanism?

Answer: Negative feedback. It automatically opposes deviations without external control.

Flashcard 68: Identify the feedback type: Increased body temperature triggers cooling mechanisms.

Answer: Negative feedback. Heat activates cooling mechanisms like sweating.

Flashcard 69: Which feedback type is typically associated with homeostatic processes?

Answer: Negative feedback. It opposes deviations to maintain steady states.

Flashcard 70: Identify the feedback mechanism: Sweating to reduce body temperature.

Answer: Negative feedback. Evaporative cooling opposes temperature increase.

Flashcard 71: Which feedback type is more likely to lead to a runaway process?

Answer: Positive feedback. It continues accelerating until external factors intervene.

Flashcard 72: Identify an example of positive feedback in human physiology.

Answer: Oxytocin release during childbirth. Stronger contractions stimulate more hormone release.

Flashcard 73: What feedback type occurs when a system moves away from equilibrium?

Answer: Positive feedback. The response amplifies rather than stabilizes the change.