In order to stabilize the hyoid so that the larynx can be elevated in swallowing, the ________ muscle group is used.
A. infrahyoid
B. auricularis
C. suprahyoid
D. pterygoid
E. hyoglossus
Answer: C
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The citric acid cycle
A) begins with the formation of a molecule of citric acid. B) directly produces most of the ATP from the catabolism of glucose. C) consumes two moles of carbon dioxide. D) contains enzymes called cytochromes. E) forms acetyl-CoA from glucose-6-phosphate.
Voltage-gated K+ channels:
a. are closed during the falling phase of the action potential b. are slow to close c. are activated at threshold, but open a short time later d. both b and c e. all of the above
Distinguish between chemical digestion and absorption
A) Chemical digestion involves the entry of food and liquid into the digestive tract, whereas absorption involves the discharge of indigestible food into material waste. B) Chemical digestion involves the breakdown of food, whereas absorption involves the movement of nutrients across the digestive epithelium into the interstitial fluid. C) Chemical digestion involves the discharge of indigestible food into material waste, whereas absorption involves the entry to food and liquid into the digestive tract. D) Chemical digestion involves the crushing and shearing of food, whereas absorption involves the movement of nutrients across the digestive epithelium into the interstitial fluid. E) Chemical digestion involves the movement of food along the digestive tract, whereas absorption involves the secretion of acids, enzymes, and buffers.
Which of the following muscles is responsible for medially rotating the tibia on the femur when the knee is flexed?
A) Piriformis B) Sartorius C) Vastus medialis D) Adductor brevis E) Semitendinosus