3. The patient went to the clinic with complaints of dizziness, shortness of breath, palpitations and pain in the limbs, which sharply worsened after a short rest in the mountains. A reduced number of...

Extracted text: 3. The patient went to the clinic with complaints of dizziness, shortness of breath, palpitations and pain in the limbs, which sharply worsened after a short rest in the mountains. A reduced number of red blood cells were found in the patient's blood, as well as immature crescent-shaped cells and red blood cells. What are the causes of this pathology? Why did the disease worsen in conditions of low partial pressure of oxygen? 4.