Hierarchical Organization SSA Study Guide

Eugene drew the following diagram to describe the levels of structural organization of an animal’s body. At the top of the pyramid he put the animal’s body. The level of organization that is least specialized will be at the bottom,

Which of the following should Eugene list at the bottom of his diagram?

• organ

• tissue

• cell

• organ system

The diagram shows parts of the human body. These parts work together to help you digest the food you eat.

Which term best describes the entire group of parts that are labeled?

• cell

• organ

• tissue

• organ system

Identify the hierarchical organization of an organism.

• atoms, molecules, cells, tissues, organs, organ systems, organisms

• organisms, atoms, molecules, cells, tissues, organs, organ systems

• organ systems, organisms, atoms, molecules, cells, tissues, organs

• atom, organ systems, organisms, organ, molecules, cells, tissues

The endocrine system of the human body releases molecules, called hormones, into the bloodstream to regulate body processes. Molecules, like hormones, are made up of which of the following?

• cells

• atoms

• tissues

• organs

Humans and other complex organisms have a hierarchical system of organization. Which of the following statements is true regarding this system of organization?

• Atoms are made of cells.

• Organs are made of organ systems.

• Cells are made of tissues.

• Organs are made of tissues.

The nervous system is the body's switchboard, sending signals between different parts of the body. The central hub of the nervous system is the brain. The brain is an example of which level of hierarchical organization within the body?

• cell

• tissue

• organ

• organ system

In a human body, which of the following represents the highest level of structural organization?

• at atom in the lung

• lung tissue

• the lungs

• the respiratory system

Weight-bearing activities, like weight lifting and walking, can help bones become thicker and stronger. Which level of structural organization is responsible for creating new bone?

• tissues

• organ's cells

• organ

• systems

The smallest level of organization of life in an organism is

• cell

• molecule

• atom

• tissue

What does the letter Z represent in the diagram?

• Organ

• Cell

• Organism

• Tissue