During digestion, what is the major site of nutrient absorption?
Small intestine
Pancreas
Stomach
Large intestine
The Correct Answer is A
A. Small intestine is the primary site of nutrient absorption. The majority of digestion and absorption of nutrients such as carbohydrates, proteins, and fats occurs in the small intestine, particularly in the duodenum and jejunum.
B. Pancreas secretes digestive enzymes into the small intestine but does not absorb nutrients itself.
C. Stomach plays a role in the digestion of proteins and the mechanical breakdown of food, but it absorbs very few nutrients, primarily alcohol and some drugs.
D. Large intestine absorbs water and electrolytes, but it is not the major site of nutrient absorption. Most nutrients are absorbed before food reaches the large intestine.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. the embryo; part of the placenta. The embryoblast (inner cell mass) will become the embryo, but the trophoblast will become part of the placenta, not the embryo.
B. part of the placenta; the embryo. The trophoblast forms part of the placenta and helps in its development, while the embryoblast (inner cell mass) will develop into the embryo.
C. part of the placenta; the yolk sac. While the trophoblast does contribute to the formation of the placenta, the embryoblast (inner cell mass) develops into the embryo, not the yolk sac. The yolk sac is derived from extraembryonic mesoderm and endoderm, not the inner cell mass directly.
D. the embryo; the yolk sac. The embryoblast (inner cell mass) develops into the embryo, but the trophoblast does not become the yolk sac. The yolk sac is formed from structures surrounding the embryo, not from the trophoblast itself.
Correct Answer is B
Explanation
A. Wastes; nutrients and oxygen: Wastes pass from the fetal blood to the maternal blood, and nutrients and oxygen pass from the maternal blood to the fetal blood.
B. Oxygen and nutrients; wastes: Oxygen and nutrients pass from maternal blood to fetal blood, and wastes pass from fetal blood to maternal blood.
C. Wastes and nutrients; oxygen and carbon dioxide: Nutrients and oxygen pass from maternal to fetal blood, while wastes and carbon dioxide pass from fetal to maternal blood. This option is incorrect because it lists wastes and nutrients incorrectly.
D. Carbon dioxide; nutrients: Carbon dioxide and other wastes pass from fetal to maternal blood, while nutrients pass from maternal to fetal blood.
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