Life Science Ch. 15

During a strenuous workout, which of the following tells your body to increase your breathing rate?

• the amount of oxygen in your blood

• the amount of carbon dioxide in your blood

• the number of alveoli in your body

• the shape of your diaphragm

Which structure prevents food from entering your lungs when you swallow?

• larynx

• nasal cavity

• pharynx

• trachea

Which structure, also known as the windpipe, is the main passageway to your lungs?

• esophagus

• larynx

• pharynx

• trachea

Which of the following sequences correctly represents the pathway of air as it travels through the respiratory structures?

• A. nasal cavity -> larynx -> alveoli -> bronchus -> trachea

• B. nasal cavity -> larynx -> bronchus -> trachea -> alveoli

• C. nasal cavity -> trachea -> larynx -> bronchus -> alveoli

• D. nasal cavity -> larynx -> trachea -> bronchus -> alveoli

When your diaphragm contracts,

• A. you inhale.

• B. you exhale.

• C. your chest cavity enlarges.

• D. you inhale and your chest cavity enlarges.

• E. you exhale and your chest cavity enlarges.

The muscular chambers that pump blood to the lungs or body are the ______.

• atria

• aortas

• valves

• ventricles

What is the purpose of valves?

• to allow blood to flow away from the heart

• to allow blood to travel to and from the lungs

• to prevent blood from flowing in the wrong direction

• to pump blood in the right direction

Which cellular structure is missing in red blood cells?

• cell membrane

• endoplasmic reticulum

• hemoglobin

• nucleus

Tags

NGSS.MS-LS1-2

Which blood component provides defense against foreign substances?

• hemoglobin

• red blood cells

• white blood cells

• platelets

What is the fluid portion of the blood?

• hemoglobin

• lymph

• platelets

• plasma