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From the following factors, choose the one that is NOT an aggravating factor for hypoxia.

  • A

    Smoking.

  • B

    Diving.

  • C

    Menstruation.

  • D

    Blood donation.

HYPOXIA

Hypoxia is a medical condition where there is a deficiency of oxygen in the tissues and organs of the body. This can occur due to various reasons, including respiratory disorders, circulatory problems, or exposure to high altitudes. Hypoxia can lead to symptoms such as shortness of breath, rapid heartbeat, confusion, dizziness, impaired judgement and loss of consciousness. Any factor that affects the oxygen delivery and usage by the body cells contributes to hypoxia.

  • Smoking results in the inhalation of carbon monoxide, which binds to hemoglobin in the red blood cells with a much higher affinity than oxygen. The red blood cells carry oxygen combined with hemoglobin. The carbon monoxide produced by smoking mixes with hemoglobin before oxygen does, leading to reduced ability of the blood to deliver oxygen to the body cells.
  • Donating blood reduces the number of the red blood cells available to transport oxygen. The body quickly compensates for this loss. The bone marrow, which is responsible for producing new RBCs, increases its production. A pilot should not fly for 24 hours after donating blood because of the increased susceptibility to hypoxia.
  • Menstruation is the regular, natural discharge of blood and mucosal tissue from the inner lining of the uterus through the vagina. This occurs as part of a woman's menstrual cycle, typically lasting about 3 to 7 days and happening approximately every 28 days. The loss of blood during menstruation leads to a temporary decrease in the number of red blood cells in circulation, decreasing the ability of the blood to transport oxygen to the body cells and making the individual more susceptible to hypoxia.
  • Diving is the act of entering water and remaining below the surface using breathing apparatus such as scuba gear. Diving is related to decompression sickness due to the bubbles formed in the blood, but cannot lead to hypoxia directly.

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