Structure and Organization
Which level of organization comes directly after cells in the human body?
A. Organs
B. Organ systems
C. Organelles
D. Tissues
D. Tissues
Which two systems work together to deliver oxygen to the body’s cells?
A. Digestive and muscular
B. Nervous and excretory
C. Respiratory and circulatory
D. Muscular and skeletal
C. Respiratory and circulatory
What is the main function of the respiratory system?
A. To pump blood through the body
B. To break down food into nutrients
C. To take in oxygen and remove carbon dioxide
D. To send signals to and from the brain
C. To take in oxygen and remove carbon dioxide
A student claims that the circulatory system depends on the respiratory system. Which evidence best supports this claim?
A. The circulatory system helps muscles move bones.
B. The respiratory system protects the brain from injury.
C. Oxygen from the respiratory system is transported by the circulatory system.
D. The digestive system delivers oxygen to the circulatory system.
C. Oxygen from the respiratory system is transported by the circulatory system.
Jaylen runs up a flight of stairs and feels his heart beating faster. Which two systems are working together to meet his body’s increased oxygen needs?
A. Skeletal and nervous
B. Respiratory and circulatory
C. Muscular and excretory
D. Digestive and skeletal
B. Respiratory and circulatory
A student observes a sample of skin under a microscope. It is made up of many of the same type of cell working together. What level of organization is the student most likely seeing?
A. Tissue
B. Organ
C. System
D. Organism
A. Tissue
During exercise, your breathing rate and heart rate both increase. What does this show about how your body systems work?
A. Each system works separately to keep the body moving.
B. The circulatory and respiratory systems interact to supply cells with oxygen.
C. The skeletal system controls the increase in oxygen.
D. Exercise stops systems from interacting.
B. The circulatory and respiratory systems interact to supply cells with oxygen.
Which system is primarily responsible for removing waste from the body through urine?
A. Muscular system
B. Circulatory system
C. Respiratory system
D. Excretory system
D. Excretory system
A student says that the body is made of systems that work together instead of separately. Which example best supports this idea?
A. The brain controls thoughts through the nervous system.
B. The digestive system and respiratory system share some organs.
C. The muscular system creates energy for the body.
D. The respiratory and circulatory systems work together to deliver oxygen.
D. The respiratory and circulatory systems work together to deliver oxygen.
Sofia eats a sandwich before soccer practice. A few hours later, she’s full of energy and playing hard on the field. Which systems help explain how her body turned food into energy and used it?
A. Digestive and muscular
B. Circulatory and skeletal
C. Excretory and respiratory
D. Nervous and skeletal
A. Digestive and muscular
Which of the following best describes how a muscle is organized in the human body?
A. A muscle is made of systems that form tissues, which form cells.
B. A muscle is a system made of tissues and organs.
C. A muscle is an organ made of tissues formed by groups of similar cells.
D. A muscle is a tissue made of different systems.
C. A muscle is an organ made of tissues formed by groups of similar cells.
A student eats a snack and then goes for a run. Which interaction between systems best supports how the body responds?
A. The muscular system digests food while the excretory system provides oxygen.
B. The digestive system breaks down food, and the muscular system uses the energy.
C. The nervous system supplies nutrients, and the skeletal system uses them.
D. The excretory system uses oxygen while the digestive system strengthens muscles.
B. The digestive system breaks down food, and the muscular system uses the energy.
A student feels pain in their hand after touching a hot stove. Which system processes this information and causes a quick reaction?
A. Circulatory system
B. Digestive system
C. Nervous system
D. Respiratory system
C. Nervous system
Which argument best supports the idea that the body is made of subsystems that interact?
A. Each system performs a different job without help.
B. Organs are made of many different organisms.
C. Body systems communicate and rely on each other to perform functions.
D. Cells work alone to move and support the body.
C. Body systems communicate and rely on each other to perform functions.
A student accidentally steps on a sharp rock and quickly pulls their foot away. Which systems are directly involved in this quick response?
A. Skeletal and digestive
B. Respiratory and muscular
C. Nervous and muscular
D. Circulatory and excretory
C. Nervous and muscular
A student claims that damage to a group of cells in the heart can affect the entire circulatory system. Which reasoning best supports this claim?
A. Systems only work when one cell type performs all functions.
B. Organs do not depend on the function of cells.
C. Cells form tissues, which form organs that must work together within a system.
D. Systems cannot fail if other systems are working correctly.
C. Cells form tissues, which form organs that must work together within a system.
A person is startled by a loud noise and jumps back suddenly. Which systems are most directly interacting in this response?
A. Nervous and muscular
B. Respiratory and excretory
C. Digestive and circulatory
D. Skeletal and excretory
A. Nervous and muscular
Which pair of systems works together to deliver nutrients from food to the cells of the body?
A. Nervous and respiratory
B. Digestive and circulatory
C. Muscular and excretory
D. Respiratory and skeletal
B. Digestive and circulatory
A student says that problems in one system can affect the entire body. Which scenario best supports this claim?
A. A broken bone stops the muscular system from producing oxygen.
B. Lung damage prevents the circulatory system from delivering enough oxygen.
C. The nervous system helps the stomach digest food more quickly.
D. The digestive system cannot work if muscles are tired.
B. Lung damage prevents the circulatory system from delivering enough oxygen.
Tariq has a cold and is coughing. His body is trying to remove extra mucus from his lungs. Which systems are interacting in this process?
A. Muscular and digestive
B. Nervous and skeletal
C. Respiratory and muscular
D. Excretory and circulatory
C. Respiratory and muscular
A medical researcher is studying a group of cells that contract to create movement. These cells form tissues that build the heart. If these cells are damaged, what impact is most likely to occur?
A. The muscular system will replace the cells using the skeletal system.
B. The tissues will grow larger and make the heart stronger.
C. The organ's function will decrease, affecting the entire circulatory system.
D. The cells will stop working, but the heart will continue without change.
C. The organ's function will decrease, affecting the entire circulatory system.
A patient has damage to their nervous system. Which result best shows how this could affect other systems?
A. They may need more oxygen from the respiratory system.
B. Their digestive system will make more food for energy.
C. Their muscles may not respond correctly, causing problems with movement.
D. Their bones will become weaker from lack of nutrients.
C. Their muscles may not respond correctly, causing problems with movement.
A student argues that muscles could not move bones without help from another system. Which system provides that support, and what is its function in this process?
A. Skeletal system; it pumps blood through the muscles
B. Nervous system; it signals the muscles to contract
C. Excretory system; it releases energy for muscles to use
D. Respiratory system; it cools the muscles during activity
B. Nervous system; it signals the muscles to contract
A doctor observes a patient with poor circulation and weak muscles. The doctor concludes that multiple body systems are involved. Which reasoning best supports this conclusion?
A. The muscular system alone causes changes in all other systems.
B. The circulatory and muscular systems work together to provide oxygen for movement.
C. The nervous system works independently of other systems.
D. Cells stop working when the digestive system is not involved.
B. The circulatory and muscular systems work together to provide oxygen for movement.
After surgery, a patient’s nervous system is slow to send signals to their muscles. What is the most likely result of this problem?
A. The patient will need more food to recover energy.
B. The patient may have difficulty moving and reacting.
C. The skeletal system will stop producing blood cells.
D. The digestive system will stop breaking down nutrients.
B. The patient may have difficulty moving and reacting.