Mass Transport in Animals (AQA A-Level Biology): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What is the Bohr effect?
What is the Bohr effect?
Reduced O affinity when CO increases
Which way does the O dissociation curve shift at the gas-exchange surface in the lungs?
Which way does the O dissociation curve shift at the gas-exchange surface in the lungs?
Left (increased O affinity)
What causes the O dissociation curve to shift right in rapidly respiring tissues?
What causes the O dissociation curve to shift right in rapidly respiring tissues?
High CO from cellular respiration
How does CO reduce haemoglobin's O affinity?
How does CO reduce haemoglobin's O affinity?
Forms acid, lowers pH, changes Hb shape
What is the normal O saturation of haemoglobin in human lungs?
What is the normal O saturation of haemoglobin in human lungs?
97%
What O saturation does blood have returning to lungs from low-activity tissues?
What O saturation does blood have returning to lungs from low-activity tissues?
75%
How many O molecules unload per haemoglobin in very active tissues like exercising muscle?
How many O molecules unload per haemoglobin in very active tissues like exercising muscle?
Three
How does haemoglobin adapt in species living in low partial pressure O environments?
How does haemoglobin adapt in species living in low partial pressure O environments?
Higher O affinity
Why is lugworm haemoglobin's dissociation curve shifted far left compared to humans?
Why is lugworm haemoglobin's dissociation curve shifted far left compared to humans?
To load O from low-O burrow water
Why do llamas have haemoglobin with higher O affinity than humans?
Why do llamas have haemoglobin with higher O affinity than humans?
Adapted to low partial pressure at altitude