Answer the following statements true (T) or false (F)
1. Digestion occurs in the organs in the digestive tract.
2. Metabolism occurs only in the organs of the digestive tract.
3. The alimentary canal and the gastrointestinal tract refer to the same thing.
4. The esophagus is a main organ of the digestive system.
5. The duodenum is an accessory structure of the digestive system.
1. TRUE
2. FALSE
3. TRUE
4. TRUE
5. FALSE
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Which of the following is NOT consistent with active transport?
A. Movement is with a concentration gradient B. Uses cell energy C. Movement is against a concentration gradient D. Involves a carrier E. Exhibits competition and saturation
Assuming you have normal respiratory function at sea level, start holding your breath. Which of the following could be true in 60 seconds?
A. The oxygen-hemoglobin dissociation curve is shifting to the left B. Venous PO2 = 50 mmHg C. Arterial PCO2 = 50 mmHg D. Alveolar PO2 = 105 mmHg
What may result if the pharyngoesophageal sphincter does not function properly?
A) Food will cause the esophagus to collapse. B) Food will bypass the esophagus. C) Food will be swallowed much faster. D) Food cannot enter the esophagus.
Climbing at high altitude where oxygen levels are insufficient can lead to
A. respiratory acidosis. B. respiratory alkalosis. C. metabolic acidosis. D. metabolic alkalosis.