A younger colleague

asks you for advice. He received an insufficiently labeled sample from an

intestinal biopsy. The presence of which cells will best tell him whether it is

a small or large intestine?

A 10-year-old boy oversleeps and is late for

school in the morning. It is cold outside and he runs away to avoid being late.

Unfortunately, he is asthmatic and the combination of cold air, physical

exertion, and fear of being late causes him to have an asthma attack. He has

trouble breathing, feels chest tightness and a feeling of lack of air. A low

whistling sound is heard during his exhalation. The boy carries an inhaler

which he uses and manages to control the attack. During an asthma attack, there

is swelling of the mucous membranes, excessive secretion of the bronchial

glands, and contraction of the smooth muscles. It also affects the small

bronchioles, the wall of which is not strengthened by cartilage. Which picture

shows a picture of such a bronchiole?

A 12-year-old female patient presents for an

orthodontic check-up after braces placement. In one spot, part of her braces

are slightly pushing and interfering. There is a white spot that cannot be

wiped off. As a result of mechanical irritation, the mucous membrane of the

vestibular surface of the lip has become irritated and keratinised. Such spots

are known as leukoplakia and, in addition to mechanical irritation, a number of

other factors may be involved in their formation. However, the exact cause has

not yet been described. The transformation of which epithelium is involved

here, which normally forms the oral mucosa?