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Grade 10: Homeostasis & Feedback Quiz

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Understanding feedback in body systems

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Grade 10: Homeostasis & Feedback Quiz
 

Grade 10: Homeostasis & Feedback QuizOnline version

Understanding feedback in body systems

by Melanie CHUA
1

What is the main purpose of homeostasis?

2

Which mechanism detects a deviation from the set point?

3

Which type of feedback most commonly maintains homeostasis?

4

What is the role of effectors in homeostasis?

5

Which organ primarily regulates blood glucose through negative feedback?

6

Insulin and glucagon regulate which body parameter?

7

What is a set point in homeostasis?

8

An example of a negative feedback loop is:

9

Which statement best describes a feedback mechanism?

10

Fever during infection is an example of what type of mechanism?

11

What is the primary purpose of homeostasis in the human body?

12

Which mechanism typically provides the most common control in homeostasis?

13

In a negative feedback loop for body temperature, what happens if core temperature rises?

14

What role does the hypothalamus play in thermoregulation?

15

Which of the following is an example of a positive feedback mechanism?

16

What is a set point in homeostasis?

17

Which system primarily coordinates long-term homeostasis via hormones?

18

Which organ is key for osmoregulation and water balance?

19

What happens when blood glucose rises after a meal?

20

Which factor is most directly monitored by osmoreceptors for fluid balance?

21

What is the main purpose of photosynthesis in plants?

22

Which pigment primarily absorbs light for photosynthesis?

23

Which gas do plants release during photosynthesis?

24

Where in the plant cell does photosynthesis mainly occur?

25

What are the two main stages of photosynthesis?

26

Which molecule is split to supply electrons in light reactions?

27

Which gas is consumed during the Calvin cycle?

28

What is produced at the end of the light-dependent reactions?

29

Which process initiates photosynthesis in plants?

30

Which molecule is the final product of photosynthesis used for plant energy?

31

What is homeostasis in physiology?

32

Which mechanism most commonly reduces a deviation from a set point?

33

Give an example of a negative feedback loop in humans.

34

Which component acts as a sensor in a feedback system?

35

What role does an effector play in homeostasis?

36

Which is a classic positive feedback example?

37

How does osmoregulation primarily maintain homeostasis?

38

What happens when a feedback loop fails to correct a deviation?

39

Which organ plays a key role in blood glucose homeostasis?

40

Why is set point flexibility important in homeostasis?

Feedback

Homeostasis stabilizes conditions like temperature, pH, and glucose to keep cells functioning.

Receptors sense changes; effectors respond to restore balance.

Negative feedback reduces the initial stimulus to restore balance (e.g., body temperature).

Effectors such as muscles or glands execute actions commanded by the control center.

The pancreas releases insulin or glucagon to keep blood glucose within range.

Insulin lowers, while glucagon raises blood glucose to maintain balance.

Set points are target ranges the body tries to maintain.

Sweating decreases body temperature, restoring normal conditions.

A feedback loop typically follows sensor-control-effector steps.

Fever can amplify immune responses, a temporary positive feedback in infection contexts.

Homeostasis keeps variables within a narrow range to keep cells functioning despite changes outside.

Negative feedback counteracts deviations from a set point to restore balance.

Sweating and vasodilation increase heat loss to bring temperature down.

The hypothalamus acts as the body's thermostat, triggering responses to heat or cold.

Positive feedback amplifies the initial change, as seen in labor with labor contractions.

A set point is the target range the body tries to maintain for variables like temperature or glucose.

The endocrine system uses hormones to regulate processes over longer timescales.

Kidneys regulate body fluids, electrolyte balance, and waste excretion.

Insulin signals tissues to take up glucose, lowering blood sugar toward set point.

Osmoreceptors sense osmolarity to regulate thirst and antidiuretic hormone release.

Photosynthesis stores energy as glucose using light energy.

Chlorophyll gives most plants their green color and drives light absorption.

Oxygen is a byproduct of converting water and CO2 into glucose.

Chloroplasts contain chlorophyll for light reactions.

First uses light, second fixes CO2 into sugar.

Water is split to release electrons and produce O2.

CO2 is fixed into sugars in the Calvin cycle.

NADPH and ATP provide energy for the Calvin cycle.

Light absorption starts the sequence of reactions.

Glucose serves as stored chemical energy for growth.

Homeostasis keeps variables within a narrow range, not static or random.

Negative feedback dampens changes to return to set points.

Sweating cools the body; shivering generates heat to restore normothermia.

Receptors detect a change and relay information to the control center.

Effectors execute actions (e.g., muscles, glands) to correct the deviation.

Positive feedback amplifies a stimulus until a process ends (birth in this case).

Osmoregulation adjusts fluid compartments and solute concentrations.

Impaired feedback can lead to conditions like diabetes or dehydration.

The liver stores and releases glucose; pancreas also regulates insulin.

Set points can adjust for sleep, exercise, or fever to maintain balance.

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