Hemoglobin's affinity for oxygen when the BPG level is high is
A) greater than hemoglobin's affinity for oxygen when the BPG level is low.
B) less than hemoglobin's affinity for oxygen when the BPG level is low.
C) equal to hemoglobin's affinity for oxygen when the BPG level is low.
D) equal to hemoglobin's affinity for oxygen when pH is low.
E) equal to hemoglobin's affinity for oxygen when pH is high.
B
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Flexion of the head (when both side muscles constrict), are accomplished by which of the following?
a) Sternocleidomastoid b) Erector Spinae c) Splenius Muscle d) both a and d
What two factors limit the rate of facilitated diffusion across a plasma membrane?
A) the size of the substance and the charge of the substance B) the size of the substance relative to the size of the carrier protein C) the charge of the substance relative to the resting membrane potential of the cell D) the concentration gradient of the substance and the number of carrier proteins E) the temperature of the interstitial fluid and the pH of the interstitial fluid
The atomic number of an atom equals the number of ______ and the atomic weight
equals the ____. A) protons; number of protons plus neutrons B) protons; weight of all the electrons C) neutrons; number of protons plus electrons D) neutrons; number of protons
The fluid that surrounds the cells is called:
a. plasma b. interstitial fluid c. intracellular fluid d. none of the above