The level of ketone bodies in the blood increases when high levels of ________ are being metabolized.
A) glucose
B) proteins
C) carbohydrates
D) fatty acids
E) amino acids
D) fatty acids
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Carbonic acid is produced when
a) oxygen combines with bicarbonate b) oxygen combines with CO2 c) CO2 attaches to hemoglobin d) CO2 combines with water
Tommy fell and skinned his knee. The scrape did not bleed. He must have only damaged the:
A) hypodermis. B) dermis. C) subcutaneous layer. D) epidermis.
What would result from a lack of extracellular Ca2+ at the neuromuscular junction?
A. Synaptic vesicles would fail to fuse and ACh would not be released. B. The neuron must use its intracellular Ca2+ to make the vesicles fuse. C. Potassium ions are used in place of Ca2+ to ensure the vesicles fuse. D. Nothing would happen because extracellular Ca2+ does not play a role in muscle stimulation. E. Excessive synaptic vesicles would fuse and release too much ACh, overstimulating the myofiber.
A saddle joint forms between bones whose articulating surfaces have both convex and
concave regions. Indicate whether the statement is true or false