How does the oxygen dissociation curve of fetal hemoglobin differ from adult hemoglobin? What is the physiological significance of this difference?
What will be an ideal response?
Answer: Fetal hemoglobin has a higher affinity for oxygen than adult hemoglobin (the curve is left-shifted). Oxygen diffuses down a PO2 gradient from the maternal to the fetal blood in the placenta. Therefore the PO2 tends to be lower in the fetal blood than the mother's blood. The higher affinity of fetal hemoglobin allows it to be near saturated despite the lower PO2, enhancing fetal blood oxygen transport.
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A. Wernicke's area B. Limbic system C. Broca's area D. Hypothalamus E. Damage to any of these areas could cause this symptom
An inverted bell-shaped curve represents the distribution of phenotypes of a multifactorial trait in a population.
Answer the following statement true (T) or false (F)
When there is no air movement, the relationship between the intrapulmonary and atmospheric pressure is that
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The structure that connects the auricle to the tympanic membrane is called the ________
A) external acoustic meatus B) lobule C) vestibule D) helix