Human Body Systems: Interactive Learning Quizzes for Sixth Graders

Question 1

Which hormone released by the endocrine system makes you feel sleepy at night?

Accepted Answer

Melatonin

Answer

Adrenaline

Answer

Insulin

Question 2

How does the respiratory system help keep the body's acid levels balanced?

Accepted Answer

By controlling how gases are exchanged in the lungs

Answer

By removing waste from the blood

Answer

By releasing hormones that control blood pH

Answer

By moving ions across capillary walls

Question 3

During exercise, how does the circulatory system adapt to meet the increased demand for oxygenated blood by the muscles?

Accepted Answer

Increased blood flow to muscles, increased heart rate, and dilated blood vessels

Answer

Decreased heart rate and increased blood pressure

Answer

Reduced blood flow to the digestive system and constriction of blood vessels

Answer

Increased production of red blood cells

Question 4

How do growth hormone and thyroid hormone work together to help us grow?

Accepted Answer

Growth hormone helps cells divide and become specialized, while thyroid hormone controls how our bodies use energy and helps us grow.

Answer

Both growth hormone and thyroid hormone make cells divide and become specialized, leading to growth.

Answer

Growth hormone stops cells from dividing and becoming specialized, while thyroid hormone helps us grow.

Answer

Neither growth hormone nor thyroid hormone are important for growth.

Question 5

How does the digestive system protect against germs that can cause infections? Describe how physical barriers, chemicals, and immune defenses work together to stop germs from getting in and spreading.

Accepted Answer

Physical barriers, like the stomach's acid, keep germs from getting in.

Accepted Answer

Chemicals, like enzymes and bile, break down and get rid of germs.

Accepted Answer

Immune defenses, like antibodies and cells that eat germs, find and destroy germs that get into the digestive system.

Answer

The digestive system has no way to protect against germs that can cause infections.

Question 6

How does the respiratory system help regulate body temperature? Describe two specific adaptations that allow the respiratory system to maintain a stable internal temperature.

Accepted Answer

During exercise, the respiratory rate increases to promote heat loss through evaporation of water vapor from the lungs.

Accepted Answer

In cold conditions, the respiratory rate decreases to conserve body heat.

Answer

The respiratory system only exchanges gases and does not regulate body temperature.

Answer

The respiratory system does not adapt to changes in body temperature.

Question 7

How do the villi and microvilli in the small intestine help the body absorb nutrients?

Accepted Answer

They increase the surface area for nutrient absorption.

Answer

They break down nutrients into smaller molecules.

Answer

They transport nutrients to the liver.

Question 8

Follow the journey of a red blood cell from its creation to its final removal from the body.

Accepted Answer

Made in bone marrow -> Enters bloodstream -> Carries oxygen -> Removed by liver

Answer

Made in spleen -> Enters bloodstream -> Carries carbon dioxide -> Removed by kidneys

Answer

Made in liver -> Enters bloodstream -> Carries nutrients -> Removed by spleen

Question 9

How does the structure of the alveoli in the lungs help with the exchange of gases?

Accepted Answer

The alveoli have a large surface area due to their thin walls, allowing for more efficient diffusion of gases between the blood and air.

Answer

The alveoli are lined with cilia, which help to move gases in and out of the lungs.

Answer

The alveoli are filled with fluid, which helps to dissolve gases for easier exchange.

Question 10

In the digestion of fats, what are the specific roles of bile and enzymes?

Accepted Answer

Bile emulsifies fats, increasing their surface area, while enzymes break them down into free fatty acids and glycerol.

Answer

Bile breaks down fats into free fatty acids and glycerol, while enzymes emulsify fats into smaller droplets.

Answer

Both bile and enzymes break down fats into free fatty acids and glycerol.

Answer

Neither bile nor enzymes play any role in fat digestion and absorption.

Question 11

How do hormones trigger responses in cells?

Accepted Answer

Hormones bind to receptors on the cell surface, triggering a series of events inside the cell.

Answer

Hormones pass through the cell membrane and change the activity of genes.

Answer

Hormones prompt the release of more hormones.

Answer

Hormones directly change the chemical makeup of the cell.

Question 12

Which of the following best describes the liver's functions beyond digestion?

Accepted Answer

Detoxifies harmful substances, produces proteins, and regulates blood sugar.

Answer

Breaks down food into nutrients.

Answer

Pumps blood throughout the body.

Answer

Protects the body from infections.

Question 13

How does the lymphatic system help protect the body from infections and maintain fluid balance?

Accepted Answer

Filters pathogens, produces white blood cells, and transports them to infection sites.

Answer

Regulates blood pressure, produces hormones, and stores excess glucose.

Answer

Secretes digestive enzymes, absorbs nutrients, and eliminates waste products.

Answer

Transmits electrical signals, controls muscle movement, and processes thoughts.

Question 14

What is the main purpose of the circulatory system?

Accepted Answer

To transport oxygen, nutrients, and hormones around the body

Answer

To defend the body against infections

Answer

To regulate the body's temperature

Answer

To digest food and produce energy

Question 15

Which part of the respiratory system is responsible for exchanging gases?

Accepted Answer

Lungs

Answer

Nose

Answer

Trachea

Answer

Bronchi

Question 16

Which of the following is NOT a function of the digestive system?

Accepted Answer

Storing oxygen

Answer

Breaking down food

Answer

Absorbing nutrients

Answer

Getting rid of waste

Question 17

The brain and spinal cord together form the:

Accepted Answer

Central Nervous System

Answer

Peripheral Nervous System

Answer

Autonomic Nervous System

Answer

Sensory Nervous System

Question 18

The diaphragm is a muscle that plays a vital role in:

Accepted Answer

Breathing

Answer

Digestion

Answer

Circulation

Answer

Excretion

Question 19

The hormone that controls blood sugar levels is:

Accepted Answer

Insulin

Answer

Adrenaline

Answer

Thyroid hormone

Answer

Growth hormone

Question 20

In the circulatory system, which part is responsible for carrying oxygen to the body?

Accepted Answer

Arteries

Answer

Veins

Answer

Capillaries

Answer

Heart

Question 21

What is the digestive system primarily responsible for doing?

Accepted Answer

Digesting food

Answer

Removing waste

Answer

Absorbing nutrients

Answer

Controlling body temperature

Question 22

Which of these is NOT a function of the nervous system?

Accepted Answer

Making hormones

Answer

Controlling movement

Answer

Processing sensory information

Answer

Regulating body temperature

Question 23

What is the main job of blood vessels in the circulatory system?

Accepted Answer

Carrying blood and nutrients

Answer

Protecting organs

Answer

Controlling body temperature

Answer

Creating blood cells

Question 24

Which of these is part of the large intestine?

Accepted Answer

Colon

Answer

Esophagus

Answer

Stomach

Answer

Small intestine

Question 25

In the respiratory system, what do cilia do?

Accepted Answer

Trap and remove particles

Answer

Exchange gases

Answer

Regulate temperature

Answer

Produce mucus

Question 26

Which hormone, made in the pancreas, controls blood sugar levels?

Accepted Answer

Insulin

Answer

Thyroid hormone

Answer

Estrogen

Answer

Cortisol

Question 27

Which of the following is NOT a function of the circulatory system?

Accepted Answer

Storing blood

Answer

Transporting oxygen and nutrients

Answer

Regulating body temperature

Answer

Removing waste products

Question 28

The process by which air enters and leaves the lungs is called:

Accepted Answer

Respiration

Answer

Diffusion

Answer

Transpiration

Answer

Photosynthesis

Question 29

Which part of the digestive system is responsible for absorbing nutrients?

Accepted Answer

Small intestine

Answer

Stomach

Answer

Large intestine

Answer

Pancreas

Question 30

The brain is located within which system?

Accepted Answer

Nervous

Answer

Circulatory

Answer

Respiratory

Answer

Muscular

Question 31

The process of removing waste from the body is known as:

Accepted Answer

Excretion

Answer

Ingestion

Answer

Digestion

Answer

Absorption

Question 32

Which type of blood vessel carries oxygenated blood away from the heart?

Accepted Answer

Arteries

Answer

Capillaries

Answer

Veins

Answer

Lymphatic vessels

Question 33

The exchange of gases in the lungs occurs in the:

Accepted Answer

Alveoli

Answer

Bronchi

Answer

Trachea

Answer

Diaphragm

Question 34

Which part of the brain controls involuntary functions?

Accepted Answer

Medulla

Answer

Cerebrum

Answer

Cerebellum

Answer

Brain stem

Question 35

Which part of the circulatory system carries oxygen and nutrients to the body's cells?

Accepted Answer

Arteries

Answer

Veins

Answer

Capillaries

Answer

Lymph nodes

Question 36

Which organ filters blood and removes waste?

Accepted Answer

Kidneys

Answer

Heart

Answer

Lungs

Answer

Liver

Question 37

What is the primary job of the nervous system?

Accepted Answer

To control body functions and send messages

Answer

To digest food and absorb nutrients

Answer

To transport oxygen and nutrients

Answer

To keep the body safe from harm

Question 38

Which part of the digestive system absorbs nutrients?

Accepted Answer

Small intestine

Answer

Stomach

Answer

Large intestine

Answer

Liver

Question 39

What is the job of the diaphragm in the respiratory system?

Accepted Answer

To move up and down, letting air in and out of the lungs

Answer

To clean the air we breathe

Answer

To store and release oxygen

Answer

To make mucus to protect the lungs

Question 40

Which of the following is NOT a function of the circulatory system?

Accepted Answer

Digests food

Answer

Carries oxygen to cells

Answer

Removes waste products

Answer

Controls body temperature

Question 41

What is the name of the biggest artery in the body?

Accepted Answer

Aorta

Answer

Carotid artery

Answer

Pulmonary artery

Answer

Renal artery

Question 42

Which part of the nervous system controls our voluntary movements?

Accepted Answer

Somatic nervous system

Answer

Central nervous system

Answer

Peripheral nervous system

Answer

Autonomic nervous system

Question 43

What is the process by which food is broken down into smaller pieces in the digestive system?

Accepted Answer

Digestion

Answer

Eating

Answer

Absorption

Answer

Pooping

Question 44

What is the primary function of the circulatory system?

Accepted Answer

To transport substances throughout the body

Answer

To regulate body temperature

Answer

To coordinate body movements and reactions

Answer

To protect the body from infection

Question 45

Which of the following is responsible for the exchange of gases in the respiratory system?

Accepted Answer

Lungs

Answer

Trachea

Answer

Diaphragm

Answer

Bronchi

Question 46

What enzyme is responsible for breaking down carbohydrates in the digestive system?

Accepted Answer

Amylase

Answer

Protease

Answer

Lipase

Answer

Nuclease

Question 47

Which part of the nervous system controls voluntary actions?

Accepted Answer

Somatic nervous system

Answer

Central nervous system

Answer

Peripheral nervous system

Answer

Autonomic nervous system

Question 48

Which of the following is NOT a function of the digestive system?

Accepted Answer

Producing hormones

Answer

Breaking down food

Answer

Absorbing nutrients

Answer

Eliminating waste

Question 49

Which type of blood vessel carries blood away from the heart?

Accepted Answer

Artery

Answer

Vein

Answer

Capillary

Answer

Lymphatic vessel

Question 50

Which part of the brain is responsible for processing visual information?

Accepted Answer

Occipital lobe

Answer

Cerebrum

Answer

Cerebellum

Answer

Brainstem

Question 51

How does the respiratory system help regulate blood pH levels?

Accepted Answer

By releasing carbon dioxide

Answer

By absorbing oxygen

Answer

By filtering out waste products

Answer

By secreting hormones

Question 52

Which type of blood vessel carries oxygenated blood away from the heart?

Accepted Answer

Arteries

Answer

Veins

Answer

Capillaries

Answer

Venules

Question 53

What is the main function of the respiratory system?

Accepted Answer

To exchange gases between the body and the environment

Answer

To absorb nutrients from food

Answer

To produce hormones that regulate the body's activities

Answer

To filter waste products from the blood

Question 54

Which part of the nervous system controls actions that happen without conscious thought?

Accepted Answer

Autonomic nervous system

Answer

Central nervous system

Answer

Somatic nervous system

Answer

Peripheral nervous system

Question 55

Which hormone is responsible for regulating blood sugar levels?

Accepted Answer

Insulin

Answer

Estrogen

Answer

Testosterone

Answer

Adrenaline

Question 56

What is the primary function of the alveoli in the lungs?

Accepted Answer

To exchange gases between the blood and the air

Answer

To absorb nutrients from the air

Answer

To filter waste products from the blood

Answer

To store excess oxygen

Question 57

Which type of blood cell is primarily responsible for fighting infections?

Accepted Answer

White blood cells

Answer

Platelets

Answer

Red blood cells

Answer

Plasma

Question 58

What is a primary role of the hypothalamus in the nervous system?

Accepted Answer

To regulate body temperature

Answer

To control voluntary movement

Answer

To process and interpret emotions

Answer

To store and retrieve memories

Question 59

Which part of the digestive system is mainly responsible for absorbing nutrients from food?

Accepted Answer

Small intestine

Answer

Stomach

Answer

Large intestine

Answer

Esophagus

Question 60

What is the purpose of the valves found in the heart?

Accepted Answer

To prevent the backflow of blood

Answer

To release hormones into the bloodstream

Answer

To pump blood out of the heart

Answer

To oxygenate the blood

Question 61

What is the primary purpose of the respiratory system?

Accepted Answer

Exchange oxygen and carbon dioxide

Answer

Transport nutrients and oxygen throughout the body

Answer

Control movement and reactions to stimuli

Question 62

Which path correctly describes the flow of blood through the heart?

Accepted Answer

Right atrium → right ventricle → lungs → left atrium → left ventricle

Answer

Right atrium → right ventricle → left atrium → left ventricle

Answer

Right atrium → right ventricle → left atrium → right ventricle

Question 63

The liver plays a crucial role in removing harmful substances from the body. How does the liver detoxify these substances, and what happens if the liver is damaged?

Accepted Answer

The liver filters toxins from the blood, preventing their build-up in the body. If the liver is damaged, toxins can accumulate, leading to health issues.

Answer

The liver produces bile, which helps digest fats. Damage to the liver can interfere with fat digestion.

Answer

The liver stores excess sugar as glycogen. If the liver is damaged, blood sugar levels can become unstable.

Answer

The liver produces enzymes that aid in digestion. Damage to the liver can affect digestion and nutrient absorption.

Question 64

Which part of the body system does NOT belong to the circulatory system?

Accepted Answer

Lungs

Answer

Heart

Answer

Blood vessels

Answer

Blood