As carbon dioxide enters systemic blood, it causes more oxygen to dissociate from hemoglobin (the Haldane effect), which in turn allows more CO2 to combine with hemoglobin and more bicarbonate ions to be generated (the Bohr effect)
Indicate whether the statement is true or false
FALSE
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The muscle primarily responsible for producing the mouth posture shown in the following figure is:
A) orbicularis oris. B) risorius. C) zygomaticus major. D) buccinator. E) levator labii superioris.
Hyperparathyroidism, which is usually caused by a hypersecreting tumor in one of the parathyroid glands, is characterized by hypocalcemia and hyperphosphatemia
a. True b. False Indicate whether the statement is true or false
An atom has 6 electrons, 6 protons, and 6 neutrons. You can tell that this atom belongs to the element _____ because _____________________.
Fill in the blank(s) with the appropriate word(s).
What would result from a lack of extracellular calcium ions at the neuromuscular junction?
A. Excessive synaptic vesicles would fuse and release too much ACh, overstimulating the myofiber. B. Synaptic vesicles would fail to fuse and ACh would not be released. C. Nothing would happen because extracellular calcium does not play a role in muscle stimulation. D. The neuron must use its intracellular calcium to make the vesicles fuse. E. Potassium ions are used in place of calcium to ensure the vesicles fuse.