What is the primary function of the human body's organ systems?

• To provide structure to the body

• To perform unique functions and interact with each other

• To store energy

• To protect the body from external harm

Which of the following is NOT a part of the central nervous system?

• Brain

• Spinal cord

• Heart

• Neurons

What is the smallest unit of the nervous system?

• Brain

• Spinal cord

• Neuron

• Heart

Tags

NGSS.MS-LS1-3

How do neurons communicate with each other?

• Through physical contact

• By releasing hormones

• By releasing electrochemical signals

• Through heat exchange

What are the main components of the cardiovascular system?

• Lungs, liver, and kidneys

• Heart, arteries, and veins

• Stomach, intestines, and bladder

• Muscles, bones, and joints

What is the primary function of the respiratory system as described in the text?

• To transport blood throughout the body

• To digest food and extract nutrients

• To facilitate the exchange of oxygen and carbon dioxide in the lungs

• To remove waste materials from the body

Which of the following is NOT a main structure of the respiratory system?

• Trachea

• Lungs

• Diaphragm

• Heart

Where does chemical digestion primarily occur in the digestive system?

• In the intestines

• In the mouth and stomach

• In the esophagus

• In the liver

What is the role of the muscular system?

• To remove excess material and waste from the body

• To transport blood and nutrients

• To facilitate movement through contraction and relaxation of muscles

• To exchange gases in the lungs

Which organ system is responsible for removing excess material and waste from the body?

• Digestive System

• Respiratory System

• Excretory System

• Muscular System