Oxygen Levels Are Lower at Higher Altitudes

question 93

Multiple Choice

Oxygen levels are lower at higher altitudes. Why would you expect to see increased numbers of reticulocytes in the blood at high altitudes?

• A) Erythrocyte production is being stimulated to increase the oxygen-carrying capacity of the blood.
• B) More reticulocytes would increase the capacity of blood to fight infections, which are common at high altitude.
• C) Monocyte production is being stimulated in order to deal with the low oxygen levels.
• D) Reticulocytes become megakaryocytes, which produce more platelets for clotting at high altitudes.

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Definitions:

Cerebrum

The cerebrum is the largest part of the brain, responsible for higher brain functions such as thought, action, memory, and emotion.

Ventricles

Hollow parts or cavities within the brain filled with cerebrospinal fluid that help protect the brain from injury and transport nutrients and waste.

CSF

Cerebrospinal fluid, a clear body fluid found in the brain and spinal cord, that acts as a cushion and provides basic mechanical and immunological protection to the brain.

Sulcus

A groove or furrow on the surface of the brain, separating adjacent gyri, and involved in increasing the brain's surface area.