RESPIRATION

Which of the following is the primary muscle involved in respiration?

• • a) Intercostal muscles

• • b) Diaphragm

• • c) Abdominal muscles

• • d) Pectoral muscles

The tiny air sacs in the lungs where gas exchange occurs are called:

• • a) Bronchi

• • b) Alveoli

• • c) Trachea

• • d) Bronchioles

Which structure prevents food from entering the trachea during swallowing?

• • a) Epiglottis

• • b) Larynx

• • c) Pharynx

• • d) Uvula

Oxygen is transported in the blood by:

• • a) White blood cells

• • b) Platelets

• • c) Hemoglobin in red blood cells

• • d) Plasma

The process of moving air into and out of the lungs is called:

• • a) Cellular respiration

• • b) Breathing

• • c) Photosynthesis

• • d) Diffusion

Which part of the brain controls the rate of breathing?

• • a) Cerebrum

• • b) Cerebellum

• • c) Medulla oblongata

• • d) Hypothalamus

The main function of the respiratory system is to:

• • a) Deliver oxygen to body tissues and remove carbon dioxide

• • b) Deliver nutrients to body tissues

• • c) Produce red blood cells

• • d) Maintain body temperature

The voice box, which contains the vocal cords, is also known as:

• • a) Pharynx

• • b) Larynx

• • c) Trachea

• • d) Esophagus

Which of the following is not a part of the respiratory system?

• • a) Trachea

• • b) Lungs

• • c) Esophagus

• • d) Bronchi

The exchange of gases between the blood and the cells of the body is called:

• • a) Internal respiration

• • b) External respiration

• • c) Cellular respiration

• • d) Ventilation