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Exothermic and Endothermic Reaction and Homeostasis

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karl allen fevidal

Philippines

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Science 10Online version Exothermic and Endothermic Reaction and Homeostasis by karl allen fevidal 1 When baking soda and vinegar is mixed it gets cold. What type of reaction absorbs heat from its surroundings? a Endothermic b Exothermic c Neutral Reaction d Static Reaction 2 Wood burns in a bonfire, it releases energy in the form of heat and light into the air. What do we call a reaction that releases heat? a Endothermic reaction b Exothermic reaction c Hypothermic reaction d Reversible reaction 3 Which of the following is an example of exothermic? a An instant ice pack getting cold to soothe a bruised knee b Melting an ice cube in a glass of room-temperature water c A campfire burning dry logs to keep campers warm at night d Photosynthesis absorbing sunlight in leaves 4 An instant cold pack is activated by squeezing it to mix the chemicals inside. Which term describes this process? a Exothermic reaction b Endothermic reaction c Combustion reaction d Mechanical reaction 5 Which statement accurately distinguishes between exothermic and endothermic reactions? a Exothermic reactions absorb heat, while endothermic reactions release heat. b Exothermic reactions release heat, while endothermic reactions absorb heat. c Both exothermic and endothermic reactions always release heat. d Neither reaction type involves any change in thermal energy. 6 It describes the body’s ability to keep its internal environment balanced and stable despite changes in the outside world a Homeostasis b Decomposition c Natural Selection d Photosynthesis 7 Which set of indicators is commonly measured to check if the human body is maintaining proper homeostasis? a Hair length, height, and skin color b Bone density, weight, and lung size c Eye color, heart size, and muscle strength d Body temperature, blood pressure, and blood glucose level 8 What normal internal human body temperature is typically maintained through homeostatic balance? a 33 b 34 c 37 d 38 9 Joseph runs under the hot sun, his body temperature begins to rise. Why does his body produce sweat in this situation? a To make his skin slippery so heat escapes faster b To increase his blood sugar level for more energy c To raise his blood pressure to match the hot weather d To cool the body down as sweat evaporates from the skin 10 If a person drinks a sugary soda, their blood glucose (sugar) level spikes. How does a healthy body understand and handle this change to keep balance? a The kidneys store the extra sugar directly in the skin tissue. b The stomach pumps extra acid to destroy all the sugar immediately. c The pancreas releases insulin to lower blood glucose back to normal levels. d The pancreas releases glucagon to lower blood glucose back to normal levels. 11 Why is it vital for the human body to keep blood pressure within a normal range? a To prevent organs from absorbing nutrients from food b To keep the body temperature constantly fluctuating c To stop the heart from beating during periods of rest d To ensure proper delivery of oxygen and nutrients to tissues without damaging blood vessels 12 A person gets stranded in a cold mountain environment without a jacket. Their body starts shivering uncontrollably. What is the main purpose of this response? a To signal to other people that they are cold b To generate heat through muscle contractions c To lower blood sugar levels so the body sleeps d To reduce blood pressure to conserve energy 13 Which scenario best illustrates a failure of the body to maintain homeostasis? a Sweating during a strenuous workout on a warm day b Shivering when stepping out into a chilly morning breeze c Feeling thirsty after running a 1km marathon and drinking water to recover d Developing high blood sugar levels after the body stops producing insulin 14 What type of feedback mechanism acts to reverse or counteract a change, bringing the system back toward its original stable state? a Negative feedback b Positive feedback c Neutral feedback d Passive feedback 15 What type of feedback mechanism amplifies or increases a change, moving the system further away from its starting point until a task is completed? a Negative feedback b Positive feedback c Inhibitory feedback d Static feedback 16 Which of the following biological processes operates using a positive feedback loop? a Regulation of blood pressure b Regulation of body temperature c Childbirth contractions driven by oxytocin release d Pancreas releases insulin when there is spike in blood sugar 17 Which of the following is an example of a negative feedback mechanism? a Blood clotting during an injury b Fruit ripening due to ethylene gas c The release of oxytocin during childbirth d Regulation of blood glucose levels by insulin and glucagon 18 During childbirth, stretching of the cervix triggers the release of oxytocin, which causes stronger contractions. Stronger contractions stretch the cervix even more, releasing even more oxytocin until the baby is born. Why is this considered positive feedback? a Because it reduces the intensity of muscle contractions. b Because it keeps the body temperature stable throughout labor. c Because it brings the body back to its initial resting condition right away. d Because it amplifies the original stimulus (stretching) to push the process to completion. 19 In a negative feedback mechanism, what typically happens when the level of a substance reaches its normal range? a The production of the substance is increased b The production of the substance is decreased or stopped c The production of the substance remains unchanged d The substance is converted into another compound 20 What would happen to human body temperature if the temperature control center used positive feedback instead of negative feedback when exposed to heat? a Body temperature would stay perfectly fixed at 37^∘ "C" . b Body temperature would quickly drop to freezing levels. c Body temperature would fluctuate randomly without any effect on health. d Body temperature would keep rising uncontrollably, leading to dangerous overheating.

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Science 10

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About this activity

Created by

Download the paper version to play

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Science 10Online version

by karl allen fevidal

When baking soda and vinegar is mixed it gets cold. What type of reaction absorbs heat from its surroundings?

Wood burns in a bonfire, it releases energy in the form of heat and light into the air. What do we call a reaction that releases heat?

Which of the following is an example of exothermic?

An instant cold pack is activated by squeezing it to mix the chemicals inside. Which term describes this process?

Which statement accurately distinguishes between exothermic and endothermic reactions?

It describes the body’s ability to keep its internal environment balanced and stable despite changes in the outside world

Which set of indicators is commonly measured to check if the human body is maintaining proper homeostasis?

What normal internal human body temperature is typically maintained through homeostatic balance?

Joseph runs under the hot sun, his body temperature begins to rise. Why does his body produce sweat in this situation?

If a person drinks a sugary soda, their blood glucose (sugar) level spikes. How does a healthy body understand and handle this change to keep balance?

Why is it vital for the human body to keep blood pressure within a normal range?

A person gets stranded in a cold mountain environment without a jacket. Their body starts shivering uncontrollably. What is the main purpose of this response?

Which scenario best illustrates a failure of the body to maintain homeostasis?

What type of feedback mechanism acts to reverse or counteract a change, bringing the system back toward its original stable state?

What type of feedback mechanism amplifies or increases a change, moving the system further away from its starting point until a task is completed?

Which of the following biological processes operates using a positive feedback loop?

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

During childbirth, stretching of the cervix triggers the release of oxytocin, which causes stronger contractions. Stronger contractions stretch the cervix even more, releasing even more oxytocin until the baby is born. Why is this considered positive feedback?

In a negative feedback mechanism, what typically happens when the level of a substance reaches its normal range?

What would happen to human body temperature if the temperature control center used positive feedback instead of negative feedback when exposed to heat?