Cough Reflex and Mechanisms

The video explores the physiology of coughing, starting with its definition as a short, explosive expulsion of air. It delves into the anatomy of the respiratory tract, focusing on the trachea and bronchial areas, and explains the role of mucosa, submucosa, and nerve fibers in the cough reflex. The video outlines the three phases of the cough reflex: inspiratory, compression, and expiratory. It also discusses various types of coughs, such as barking, honking, paroxysmal, productive, and voluntary, and their potential implications for different conditions.

What is the primary function of a cough?

• To reduce heart rate

• To expel air explosively

• To increase lung capacity

• To enhance blood circulation

Which cells in the mucosa layer are responsible for mucus production?

• Basement membrane cells

• Goblet cells

• Smooth muscle cells

• Ciliated epithelial cells

What type of nerve fibers are involved in the cough reflex?

• Olfactory nerve fibers

• Auditory nerve fibers

• Vagus nerve fibers

• Optic nerve fibers

Which of the following can trigger a cough reflex?

• High sugar intake

• Decreased oxygen levels

• Chemical irritants like histamine

• Increased blood pressure

What is the role of the vagus nerve in coughing?

• It regulates heart rate

• It controls the diaphragm

• It carries sensory information to the medulla

• It increases blood flow to the lungs

During which phase of the cough reflex does the glottis close?

• Resting phase

• Inspiratory phase

• Compression phase

• Expiratory phase

What happens during the expiratory phase of a cough?

• Air is expelled from the lungs

• The glottis closes

• The diaphragm relaxes

• The heart rate increases

Which type of cough is often associated with asthma?

• Voluntary cough

• Paroxysmal cough

• Honking cough

• Barking cough

What does a barking cough typically indicate?

• A productive cough

• A psychogenic cough

• A voluntary cough

• A habit cough

Which type of cough can be controlled by higher brain centers?

• Voluntary cough

• Honking cough

• Paroxysmal cough

• Barking cough