Which is not correct about the esophagus?
A. It produces movement by peristalsis.
B. It serves as the passageway for a bolus to pass from the pharynx to the stomach.
C. It opens to the cardia of the stomach.
D. It is located posterior to the trachea.
E. It secretes a variety of enzymes for chemical digestion.
Answer: E
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Which of the following hormones has effects that involve positive feedback loops?
What will be an ideal response?
When blood vessels become surrounded by concentric lamella forming osteons, the bone will grow in
A. length. B. diameter. C. the epiphyseal plate. D. the articular cartilage. E. all of these areas.
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.
Nitric oxide (NO) interferes with platelet function and blood clotting
Indicate whether the statement is true or false