Body Systems

Which organ system is responsible for transporting oxygen and nutrients throughout the body?

• Respiratory system

• Circulatory system

• Digestive system

• Nervous system

Answer explanation

The circulatory system is responsible for transporting oxygen and nutrients throughout the body via the blood. The respiratory system handles gas exchange, the digestive system processes food, and the nervous system controls body functions.

What is the main role of the respiratory system?

• Filtering blood

• Breathing and gas exchange

• Producing hormones

• Protecting against infections

Answer explanation

The main role of the respiratory system is breathing and gas exchange, which involves taking in oxygen and expelling carbon dioxide, essential for cellular respiration and maintaining homeostasis.

What does the endocrine system primarily regulate?

• Nerve impulses

• Metabolism and hormone secretion

• Muscle movement

• Blood circulation

Answer explanation

The endocrine system primarily regulates metabolism and hormone secretion, controlling various bodily functions through hormones, unlike nerve impulses, muscle movement, or blood circulation.

What is the main role of the integumentary system?

• Protecting the body from external environment

• Regulating hormones

• Transporting oxygen

• Digesting food

Answer explanation

The integumentary system's main role is to protect the body from the external environment, including pathogens, UV radiation, and physical injuries. This function is crucial for maintaining overall health and homeostasis.

Which system breaks down food?

• digestive

• circulatory

• respiratory

• immune

Answer explanation

The digestive system is responsible for breaking down food into nutrients that the body can absorb. The other systems listed (circulatory, respiratory, immune) have different functions and do not break down food.

 What is the main function of the respiratory system?

• take in oxygen and exhale waste like carbon dioxide

• move nutrients throughout the body

• take in carbon dioxide and exhale oxygen

Answer explanation

The main function of the respiratory system is to take in oxygen and exhale waste like carbon dioxide. This process is essential for providing oxygen to the body and removing carbon dioxide, a waste product of metabolism.

Which system involves physical and chemical change?

• endocrine system

• immune system

• digestive system

• respiratory system

Answer explanation

The digestive system involves both physical changes, like chewing and churning, and chemical changes, such as the breakdown of food by enzymes, making it the correct choice for this question.

Tags

NGSS.MS-LS1-7

In the digestive system, what type of digestion takes place in the mouth?

• Only chemical digestion (saliva)

• Only mechanical digestion (teeth, chewing)

• Both mechanical (teeth/chewing) and chemical digestion (saliva)

• Absorption of nutrients

Answer explanation

In the mouth, both mechanical digestion occurs through chewing with teeth, and chemical digestion begins with saliva breaking down food, making the correct answer both mechanical and chemical digestion.

What are the main functions of the skeletal system?

• Regulate body temperature, protect the organism from germs and bacteria in the environment.

• Provide structure, break down food into nutrients, and circulate minerals throughout the body.

• Transmit nerve signals, control all functions of the body, produce hormones

• Provide structure, protect organs, facilitate movement, produce blood cells, and store minerals.

Answer explanation

The skeletal system provides structure, protects organs, facilitates movement, produces blood cells, and stores minerals, making it essential for overall body function.

What is the main function of the excretory system?

• To digest food and absorb nutrients.

• To circulate blood and oxygen throughout the body.

• To protect the body from infections and diseases.

• To remove waste and regulate body fluids.

Answer explanation

The main function of the excretory system is to remove waste and regulate body fluids, ensuring the body's internal environment remains stable. This is crucial for maintaining overall health and homeostasis.