Unit 6 Review

Homeostasis is the process of keeping the proper conditions inside the body, no matter what is happening outside the body. Which body system maintains homeostasis by coordinating the actions of the other systems?

• Excretory system

• Nervous system

• Circulatory system

• Musculoskeletal system

The illustration below shows the tiny structure that makes up the lungs of the respiratory system. Each lung contains millions of these structures.

What is the function of this structure?

• Allowing movement

• Digestion of food

• Exchanging oxygen and carbon dioxide

• Processing sensory information

The graph below shows how pulse rate changes with exercise.

Which of the following BEST explains how body systems worked together to create the results shown on the graph?

• As the body is able to exercise using the musculoskeletal system, the circulatory system pumps more blood and oxygen throughout the body. The respiratory system takes in more oxygen from the environment and releases carbon dioxide.

• As the body breaks down food using the digestive system, the nervous system communicates that the body needs to prevent weight gain by exercising using the musculoskeletal system.

• As the body uses its excretory system to eliminate wastes, the digestive system takes in more nutrients used by the endocrine system for growth and development.

• As the body’s nervous and endocrine systems are stimulated by exercise, the body’s circulatory system is less able to regulate body temperature.

The systems of the human body work together to maintain homeostasis. Which of the following statements describes how the human body maintains homeostasis within the circulatory system?

• The lymph nodes collect excess fluid and deliver it to the kidneys through the blood vessels.

• Blood vessels expand to help the body shed heat to maintain a constant body temperature.

• The lungs pull carbon dioxide from red blood cells in the alveoli and diffuse oxygen into the red blood cells.

• Veins and arteries supply all parts of the body with nutrient-rich blood and remove the nutrient-lacking blood.

A correct balance of oxygen and carbon dioxide must be maintained in the human body to survive. Which system is responsible for taking in oxygen and releasing carbon dioxide to the external environment to maintain this internal balance?

• Respiratory

• Circulatory

• Digestive

• Nervous

Which two systems work together to maintain homeostasis while transporting oxygen throughout the body and removing carbon dioxide?

• Circulatory and respiratory

• Respiratory and excretory

• Circulatory and digestive

• Respiratory and digestive

How could a blood test reveal what foods a person has eaten?

• The blood would contain particles of undigested food.

• The blood would change color based on the type of food.

• The blood would contain nutrients absorbed from the food.

• The blood would contain white blood cells from certain foods.

The systems of the human body work together to maintain homeostasis. Which of the following statements describes how the human body maintains homeostasis within the circulatory system?

• The kidneys collect and store the urine which is then released into the blood stream.

• Blood vessels expand to help the body shed heat and sweat is released through the skin to maintain a constant body temperature.

• The lungs remove oxygen from red blood cells and allow carbon dioxide into the red blood cells.

• Veins and arteries supply all parts of the body with nutrient-poor blood and remove the nutrient-rich blood.

Which two body systems remove waste products from the body?

• Digestive and nervous

• Respiratory and excretory

• Circulatory and reproductive

• musculosckeletal and immune

Which two systems work together to maintain homeostasis while transporting oxygen throughout the body and removing carbon dioxide?

• Circulatory and respiratory

• Respiratory and excretory

• Circulatory and digestive

• Respiratory and digestive