During normal expiration,
A) elastic recoil of stretched muscles helps return the thorax to its resting volume.
B) elastic recoil of stretched muscles helps return the thorax to its resting volume and the internal intercostal muscles are required.
C) the internal intercostal muscles are required.
D) elastic recoil of stretched muscles helps return the thorax to its resting volume, the internal intercostal muscles are required, and the abdominal muscles become involved.
E) the abdominal muscles become involved.
A) elastic recoil of stretched muscles helps return the thorax to its resting volume.
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The digestion of carbohydrates and lipids begins in the
A) oral cavity. B) esophagus. C) stomach. D) small intestine. E) large intestine.
Describe a portal triad
A) A portal triad consists of two lobes of the liver and the gallbladder. B) A portal triad consists of the three primary lobes of the liver. C) A portal triad consists of an interlobular vein, an interlobular artery, and an interlobular bile duct. D) A portal triad consists of three hepatocytes forming a lobule. E) A portal triad consists of a central vein, bile canaliculi, and bile ductules.
Describe the role of the medulla oblongata
A) The medulla oblongata functions in conscious thought, memory storage and processing, and regulating skeletal muscle contractions. B) The medulla oblongata contains centers involved with emotions, autonomic function, and hormone production. C) The medulla oblongata relays sensory information to other parts of the brainstem and to the thalamus. It also contains centers that regulate autonomic functions, such as heart rate and blood pressure. D) The medulla oblongata coordinates and modulates motor commands coming from the cerebral cortex. E) The medulla oblongata processes visual and auditory information and controls reflexes triggered by those stimuli.
Cyclic AMP activates allosteric proteins
Indicate whether the statement is true or false.