Respiratory System Quiz

How Does This Respiratory System Quiz Work?

The quiz is split into seven practice sets that follow the order most courses teach the respiratory system, from naming the parts to explaining how breathing is controlled, and every set ends with a table of answers. A six-question multiple-choice quiz near the bottom of the page lets you tap an answer and check it straight away.

1. Read the short note at the start of each set to see what it tests.
2. Cover the answer column of the table with a sheet of paper.
3. Write or say your answer to each question, then uncover it and mark yourself.
4. For every question you miss, open the linked topic page and reread that part.
5. Come back a day or two later and retry only the questions you missed.

If you are just starting the topic, study the labeled respiratory system diagram first, or use the printable respiratory system worksheets, which give more support with word banks. Numbers in the answers are typical textbook values for a healthy young adult at rest; real values vary with body size, age and sex.

Respiratory System Anatomy Quiz: Upper Respiratory Tract

This set tests the anatomy of the upper respiratory tract: the nose, nasal cavity, paranasal sinuses, pharynx and larynx, including the pharynx anatomy questions that often appear on tests. The key to this set is knowing each part's position relative to its neighbors, not just its name.

Before you start, picture a side view of the head. The nasal cavity sits above the roof of the mouth, the pharynx runs down behind both, and the larynx sits at the front of the neck where the airway separates from the food passage. Most wrong answers in this set come from mixing up the three parts of the pharynx or the cartilages of the larynx.

Lower Respiratory Tract and Lung Anatomy Questions

This set covers the lower respiratory tract: the trachea, the branching bronchial tree and the anatomy of the lungs themselves, including lobes, fissures and the hilum. The questions most students miss are the ones about differences between the right and left sides.

Remember three right-left contrasts. The right main bronchus is wider, shorter and more vertical; the right lung has three lobes and two fissures while the left has two lobes and one fissure; and only the left lung has a cardiac notch and a lingula. For the full anatomy, see our pages on the trachea, the bronchi and the lungs.

Thoracic Cavity Anatomy Quiz: Pleura, Mediastinum and Diaphragm

This thoracic cavity anatomy quiz checks how the lungs are packaged inside the chest: the pleural layers, the mediastinum between the lungs and the muscles that form the walls and floor. These structures are not airways, but questions about them appear on almost every respiratory system test.

Think of each lung as sitting inside a closed, double-layered bag. The inner layer covers the lung, the outer layer lines the chest wall, and a thin film of fluid between them lets the lung slide as it moves. The diaphragm closes the cavity from below, and the intercostal muscles fill the spaces between the ribs.

Respiratory System Histology Quiz

This respiratory system histology quiz tests the tissues that line each level of the airway, a topic that trips up many students because the lining changes gradually from the nose to the alveoli. The general rule is that the epithelium becomes thinner and simpler the deeper you go, until it is thin enough for gas exchange.

In the trachea and bronchi the lining is tall, ciliated and full of mucus-making goblet cells, which trap and clear dust. In the bronchioles the cartilage disappears and the cells become shorter. In the alveoli, flat type I cells form most of the wall, while rounder type II cells make surfactant. Our page on cilia and mucus explains how the lining keeps the airway clean.

Breathing Mechanics Questions: How Does Air Move In and Out?

This set tests pulmonary ventilation, the physical process that moves air into and out of the lungs, and almost every answer comes back to one rule: when the volume of the chest increases, the pressure inside the lungs falls and air flows in. That rule is Boyle's law, which states that at a constant temperature the pressure of a gas falls as its volume rises.

Know which muscles act in each phase. Quiet breathing in uses the diaphragm and the external intercostals; quiet breathing out is passive recoil; forced breathing out adds the internal intercostals and the abdominal muscles. The comparison chart below summarizes the two phases, and our respiratory system functions page places breathing within everything else the system does.

Gas Exchange, Transport and Control of Breathing Questions

This set tests what happens after air reaches the alveoli: how oxygen and carbon dioxide cross into and out of the blood, how the blood carries them, and how the brainstem adjusts breathing to keep their levels steady. It is the most physiology-heavy set and the one most often examined in anatomy and physiology courses.

Hold on to three ideas. Gases cross the respiratory membrane by simple diffusion, moving from higher to lower partial pressure, as explained on our gas exchange page. Oxygen travels mostly bound to hemoglobin, while carbon dioxide travels mostly as bicarbonate. And at rest, the level of carbon dioxide in the blood, sensed through its effect on acidity, is the main signal that sets how fast and deep you breathe.

Lung Volumes and Capacities Quiz

This lung volumes and capacities quiz checks the four basic lung volumes measured with a spirometer and the capacities made by adding them together. Learn the volumes first, because every capacity is simply a sum of two or more of them.

• Tidal volume: the air of one quiet breath.
• Inspiratory reserve volume: the extra air you can still breathe in after a normal breath in.
• Expiratory reserve volume: the extra air you can still force out after a normal breath out.
• Residual volume: the air that always stays in the lungs and cannot be breathed out.

The bar chart below shows their relative sizes without numbers; the exact typical values are in the answer table. Values in a textbook are averages for a healthy young adult, and real values are larger in taller people and smaller in shorter and older people.

How Can You Score Higher on a Respiratory System Test?

The fastest way to raise your score is to learn the parts in the order air flows through them, attach one function to each part, and then practice explaining processes out loud rather than rereading notes. Testing yourself, as on this page, works better than reading the same chapter again.

• Use the airflow order. Nose, pharynx, larynx, trachea, bronchi, bronchioles, alveoli: most labeling and sequencing questions follow it. Our pathway of air page walks through it.
• Watch the right-left traps. Diagrams show the body's right on your left, and the right lung has the extra lobe.
• Separate similar words. Pharynx and larynx, bronchi and bronchioles, ventilation and respiration, and visceral and parietal pleura are classic mix-ups.
• Learn mechanisms, not just facts. Be ready to explain why the chest pressure changes, why oxygen diffuses and why carbon dioxide drives breathing.
• Build a model. A balloon lung model makes the pressure changes of breathing easy to remember.