Medical Quiz

Anatomy & Physiology: Respiratory Quiz


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The left lung has ___ lobes, and the right lung has ___ lobes.

A. 3; 4

B. 1; 3

C. 3; 2

D. 2; 3


The volume of air inspired and expired during quiet breathing.

A. Inspiratory Reserve Volume

B. Residual Volume

C. Functional Residual Capacity

D. Tidal Volume


The driving force regulating breathing is ________.

A. blood O2 levels

B. blood glucose levels

C. blood CO2 levels

D. Both “blood CO2 levels” and “blood O2” levels.


During expiration, the diaphragm ___ causing a(n) ___ in thoracic volume and a(n) ___ in the alveolar pressure.

A. Relaxes; decrease, increase

B. Relaxes; increase, decrease

C. Contracts; decrease; increase

D. Contracts; increase; decrease


___ is a substance secreted by cells of the alveoli that reduces surface tension of the fluid around the alveoli, preventing collapse of the alveoli.

A. Mucosa

B. Pleural fluid

C. Both “surfactant” and “pleural fluid” are correct

D. Surfactant


The basic rhythm of breathing is controlled by neurons in the ________.

A. medulla oblongata

B. lungs

C. cerebrum

D. heart


Which of the following is NOT a function of the respiratory system?

A. Voice production

B. Olfaction

C. Delivery of oxygen to the tissues of the body

D. Regulation of blood pH

E. Gas exchange


The sum of all lung volumes

A. Vital Capacity

B. Tidal Volume

C. Functional Residual Capacity

D. Total Lung Capacity


During inspiration, the diaphragm ___ causing a(n) ___ in thoracic volume and a(n) ___ in the alveolar pressure.

A. Relaxes; increase; decrease

B. Contracts; increase; decrease

C. Relaxes; decrease; increase

D. Contracts; decrease; increase


To increase CO2 levels in the blood, a person should

A. Breathe faster than normal

B. All of the choices are correct

C. Take deeper and longer breaths

D. Hold their breath


The is composed of the alveolar wall and the walls of surrounding capillaries.

A. Respiratory Membrane

B. All of the choices are correct

C. Mucosa

D. Pleura


The amount of air that a person can inspire maximally after a normal expiration

A. Expiratory Reserve Volume

B. Inspiratory Reserve Volume

C. Inspiratory Capacity

D. Vital Capacity


The amount of air that can be expired forcefully beyond the resting tidal volume

A. Expiratory Reserve Volume

B. Vital Capacity

C. Functional Residual Capacity

D. Tidal Volume


Oxygen enters the blood at the lungs because

A. The partial pressure of oxygen is higher in the blood than in the alveoli.

B. The partial pressure of oxygen is lower in the blood than in the alveoli.

C. Oxygen is attracted to the negative charges of plasma proteins.

D. Low blood pressure does not oppose oxygen movement.


The volume of air remaining in the lungs after maximal expiration

A. Inspiratory Capacity

B. Vital Capacity

C. Residual Volume

D. Functional Residual Capacity




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