A 75-year-old woman has been suffering from

right hip pain for a long time. An X-ray showed signs of severe osteoarthritis.

Therefore, the patient underwent total hip replacement. Histological

examination of the surgical specimen revealed a significantly damaged articular

surface with marked cartilage degeneration. Which of the following factors is

primarily responsible for the poor regeneration of articular cartilage?

A 29-year-old woman comes to

the doctor for repeated infections caused by Anaplasma (bacteria).

Unfortunately, this particular species is resistant to most antibiotics, so it

is necessary to prescribe an antibiotic from the tetracycline group. These

antibiotics have a high ability to build into the mineral component of newly

formed bone as well as tooth enamel and dentin, thereby damaging these hard

tissues. Given the properties of these antibiotics, what can prevent the use of

a drug from this group?

Todo número natural tem antecessor.

Um número natural é menor do que seu sucessor.

Todo número natural tem sucessor.

Se dois números naturais têm o mesmo sucessor, então esses números são iguais.

O Zero não é sucessor de nenhum número natural.

The researcher would like to study the process

of cartilage tissue formation (chondrification). However, chondrogenesis is a

process that takes place only to a very limited extent after birth, and

therefore it is decided to study it during prenatal development. If he knows

the approximate location of the formation of cartilage. What tissue in a given

place should he expect before the formation of cartilage?

Two healthy individuals have a healthy son. His

physical, motor, psychological, and social development fully corresponded to

his age. Now at the age of two, the patient is admitted for a suspected

fracture of the right tibia. The injury is negative and the mechanism of

fracture is unknown. In addition, he was already hospitalized once 5 months ago

for a left radius fracture. The mechanism of fracture was not identified here

either. Physical examination reveals limited mobility of the right lower

extremity, soreness in the lower tibia and gluteal region and a relatively

greater amount of bruising on the body overall. Slightly bluish sclerae are

noticeable. X-ray confirms the diagnosis of a fracture of the right tibia.

Basic laboratory findings (blood count and biochemistry) are normal. Genetic

testing shows that the disease is caused by a mutation and defect in collagen

formation associated with, among other things, increased bone fragility. This

is the disease

Фразеологізм вилетіти в трубу означає щось загубити