How will a 30% drop in hemoglobin levels in the blood (anemia) affect oxygen delivery to the tissues? How can the body compensate for this?
What will be an ideal response?
Answer: A 30% drop in hemoglobin will produce nearly a 30% drop in oxygen delivery to the tissues. One compensatory mechanism is for the tissues to remove a greater fraction of the oxygen from hemoglobin. Another compensatory mechanism would be to increase cardiac output.
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Which of the following reduces friction in movable joints, such as the knee?
A) sebum B) serous fluid C) synovial fluid D) sweat E) keratin
The right and left vertebral arteries join together to form the basilar artery.
Answer the following statement true (T) or false (F)
The presence of proteins in the plasma tends to
A. push fluid across the filtration membrane. B. draw fluid back into the glomerulus.
Which statement is not true concerning characteristics of life?
a. all body cells exhibit irritability to some extent b. growth can be an increase in size due to an increase in the number of cells c. Each organ system is isolated from all other body systems d. Reproduction occurs on both the cellular level and the oganismal level