Question

a)What are the causes of yawning? What are the various situations under which yawning occurs?
b) What does breathing rate indicate when a person is tired, bored and felt sleepy or drowsy? How
does yawning improve the situation?
First answer will be marked as brainliest​

Answer 1

Answer:

a) Yawning (oscitation) most often

occurs in adults immediately before and after sleep, during tedious activities and as a result of its contagious quality. It is commonly associated with tiredness, stress, sleepiness or boredom, and even hunger. ... During a yawn the tensor tympani muscle in the middle ear contracts.

Answer 2

Answer:

correct answers please mark brainliest please like