Coughing Reflex

Question 1

What initiates the coughing reflex?

Answer 1

Irritation of the mucous membrane in the respiratory tract

Epithelial receptors in the respiratory tract are sensitive to mechanical and chemical stimuli

Question 2

Which nerve is involved in sending impulses for the coughing reflex?

Answer 2

Vagus nerve

The impulse is sent to the respiratory centre in the brain stem

Question 3

What happens to the glottis during the coughing reflex?

Answer 3

Closure of the glottis

This also includes the closure of the vocal cords

Question 4

What physiological actions occur during the coughing reflex?

Answer 4

Deep inhalation and contraction of abdominal/respiratory muscles

These actions increase pressure in the respiratory system

Question 5

What is the purpose of the coughing reflex?

Answer 5

Forced removal of irritation

It helps clear irritants from the respiratory tract

Question 6

How fast can the coughing reflex occur?

Answer 6

600 mph

Question 7

What types of stimuli can trigger the coughing reflex?

Answer 7

Mechanical and chemical stimuli

Epithelial receptors are highly sensitive to these types of stimuli

Question 8

Which part of the respiratory system contains sensitive nerve endings that are stimulated during coughing?

Answer 8

Larynx, trachea, bronchi