Organizational Structure of Humans
Which example BEST demonstrates the correct relationship between levels of organization?
A. Tissues form cells, cells form organs, organs form systems
B. Cells form organs, organs form tissues, tissues form systems
C. Cells form tissues, tissues form cells, organs form systems
D. Cells form tissues, tissues form organs, organs form systems
D. Cells form tissues, tissues form organs, organs form systems
Which statement BEST explains how the brain supports the function of the nervous system?
A. The brain breaks down food, which helps provide energy
B. The brain carries oxygen, which helps cells survive
C. The brain sends and receives signals, which helps control body activities
D. The brain supports bones, which helps movement
C. The brain sends and receives signals, which helps control body activities
Melissa accidentally touches a hot surface and then quickly pulls her hand away. Which 2 systems of the body were involved with her action and reaction?
a. Nervous and Muscular
b. Skeletal and Circulatory
c. Nervous and Respiratory
d. Muscular and Respiratory
a. Nervous and Muscular
neuron (nerve cell) → nervous tissue → brain → ______ → human
Which answer correctly completes the above sequence?
a. Multicellular Organism
b. Nerves
c. Nervous System
d. Circulatory System
c. Nervous System
What is the main function of the muscular system?
A. To support the body and protect organs
B. To carry oxygen throughout the body
C. To contract and produce movement
D. To control body responses
C. To contract and produce movement
What is one way the muscular system and the skeletal system work together in the human body?
a. The muscular system transports oxygen while the skeletal system pumps blood.
b. The muscular system supports the body’s shape while the skeletal system moves the body.
c. The muscular system contracts to move bones while the skeletal system provides structure and protection.
d. The muscular system breaks down food while the skeletal system absorbs nutrients.
c. The muscular system contracts to move bones while the skeletal system provides structure and protection.
Red blood cells carry oxygen through the body. Groups of these cells form blood, which helps the heart function. The heart works with blood vessels to form the circulatory system.
Which level is represented by “blood” in this example?
a. Cell
b. Tissue
c. Organ
d. Organ System
b. Tissue
If the small intestine cannot absorb nutrients, which function is MOST directly affected?
A. Delivery of nutrients to cells
B. Movement of the body
C. Exchange of gases
D. Protection of organs
A. Delivery of nutrients to cells
Which statement BEST explains how the circulatory and nervous systems work together?
A. The circulatory system sends signals while the nervous system transports blood
B. The circulatory system delivers oxygen while the nervous system controls body responses
C. The circulatory system breaks down food while the nervous system absorbs nutrients
D. The circulatory system controls breathing while the nervous system exchanges gases
B. The circulatory system delivers oxygen while the nervous system controls body responses
A student writes:
Cells → Tissues → Organ Systems → Organs → Organism
Which explanation BEST identifies the error?
A. Organs and organ systems are reversed; organs must come before systems because systems are made of organs
B. Cells should come after tissues because tissues are smaller units
C. Organism should come before organ systems because it controls all systems
D. There is no error because all levels are included
A. Organs and organ systems are reversed; organs must come before systems because systems are made of organs
Which statement BEST describes the difference between the trachea and the esophagus?
A. The trachea carries food to the stomach, while the esophagus carries air to the lungs
B. The trachea breaks down food, while the esophagus moves air
C. The trachea absorbs nutrients, while the esophagus controls breathing
D. The trachea carries air to the lungs, while the esophagus carries food to the stomach
D. The trachea carries air to the lungs, while the esophagus carries food to the stomach
Which statement best contrasts the circulatory system and the digestive system?
a. The circulatory system transports oxygen and nutrients throughout the body, while the digestive system breaks down food into nutrients.
b. The circulatory system removes waste from the body, while the digestive system produces oxygen.
c. The circulatory system produces energy for the body, while the digestive system delivers oxygen to cells.
d. The circulatory system digests food, while the digestive system transports blood.
a. The circulatory system transports oxygen and nutrients throughout the body, while the digestive system breaks down food into nutrients.
Student A: “Tissues are made of similar cells, and organs are made of different tissues.”
Student B: “Organs are made of similar cells, and tissues are made of organs.”
Which statement BEST evaluates the students’ explanations?
A. Student A is correct because tissues combine to form cells, which then organize into organs
B. Student A is correct because tissues are groups of similar cells working together, and organs are made of multiple tissues that perform a specific function
C. Student B is correct because organs are the simplest structures made of similar cells
D. Student B is correct because tissues are larger structures that are made of organs
B. Student A is correct because tissues are groups of similar cells working together, and organs are made of multiple tissues that perform a specific function
Which statement BEST describes the difference between voluntary and involuntary muscles?
A. Voluntary muscles carry oxygen through the body, while involuntary muscles break down food for energy
B. Voluntary muscles work automatically to pump the heart and move food, while involuntary muscles move body parts like arms and fingers by choice
C. Voluntary muscles move body parts like arms and fingers by choice, while involuntary muscles work automatically to pump the heart and move food
D. Voluntary muscles support bones, while involuntary muscles protect organs
C. Voluntary muscles move body parts like arms and fingers by choice, while involuntary muscles work automatically to pump the heart and move food
Which statement best compares the respiratory and circulatory systems in the human body?
a. The respiratory system moves oxygen to cells, while the circulatory system removes carbon dioxide from the body.
b. The respiratory system brings oxygen into the body, while the circulatory system transports oxygen to cells throughout the body.
c. The respiratory system pumps blood through the body, while the circulatory system filters out waste.
d. The respiratory system breaks down food for energy, while the circulatory system delivers nutrients to cells.
b. The respiratory system brings oxygen into the body, while the circulatory system transports oxygen to cells throughout the body.