The Bohr effect describes the ________.
A. effect of pH on the affinity of hemoglobin for carbon dioxide
B. effect of pH on the affinity of hemoglobin for oxygen
C. effect of solubility on the amount of gas dissolved in blood
D. mechanism of ventilation
Answer: B
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The urge to urinate is caused by skeletal muscle contraction
Indicate whether the statement is true or false.
Color vision has much greater resolution than night vision (vision that is mostly in shades of gray). Which of the following is the best explanation for why this is so?
A) A single cone photoreceptor often connects to a single bipolar cell and a single ganglion cell while as many as 100 rods will converge to a single ganglion cell. B) There are many more cone photoreceptors in the eye than rod photoreceptors. C) There are several types of cone photoreceptors, each of which enrich the clarity and resolution of vision. D) A larger proportion of the brain's visual cortex is active during the day when our cone photo receptors are most active.
A compound action potential is recorded using electrodes on a nerve. How does a nerve differ from an axon? Amplitude and duration of a compound action potential vary according to the stimulus intensity applied to the nerve. Given that there is no such variation in the action potential of a single axon, how can you explain this?
What will be an ideal response?
Plasma consists of 40% to 45% water
Indicate whether the statement is true or false