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

• Decrease in adrenaline production
• Increase in oxygen levels in the blood
• Decrease in heart rate
• Build-up of carbon dioxide in the blood

Tags

NGSS.HS-LS1-3

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

• Tracheaflap
• Lungguard
• Bronchialvalve
• Larynx

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

• Esophagus
• Bronchi
• Alveoli
• Trachea

When your diaphragm contracts,

• you exhale.

• you inhale.

• you inhale and your chest cavity enlarges.

• 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 prevent blood from flowing in the wrong direction.

• To generate electricity
• To increase the pressure of fluids or gases
• To regulate temperature in a system

Most blood cells are formed in the

• liver
• spleen
• kidneys
• bone marrow

What is the fluid portion of the blood?

• Red blood cells
• Plasma
• White blood cells
• Platelets

Blood vessels that carry blood away from the heart are called

• Arteries
• Capillaries
• Nerves
• Veins

A blood clot forms when ______________ clump together.

• White blood cells
• Platelets
• Hemoglobin
• Red blood cells