Multiple Choice
In the diagram of a typical neuron, which structure is responsible for transmitting electrical impulses away from the cell body?
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5. Cell Components
Introduction to Eukaryotic Organelles
Multiple Choice
Which region of the small intestine is primarily responsible for the majority of nutrient absorption in humans?
A
Cecum
B
Duodenum
C
Ileum
D
Jejunum
Verified step by step guidance1
Understand the anatomy of the small intestine: The small intestine is divided into three main regions—duodenum, jejunum, and ileum. Each region has specific roles in digestion and absorption.
Review the function of the duodenum: The duodenum is the first section of the small intestine. It primarily focuses on the breakdown of food using enzymes and bile, preparing nutrients for absorption.
Examine the role of the jejunum: The jejunum is the middle section of the small intestine. It has a highly folded surface with villi and microvilli, which increase surface area for efficient nutrient absorption. This is where the majority of nutrient absorption occurs.
Consider the function of the ileum: The ileum is the final section of the small intestine. It absorbs specific nutrients like vitamin B12 and bile salts, but it is not the primary site for overall nutrient absorption.
Conclude that the jejunum is the correct answer: Based on its structure and function, the jejunum is the region of the small intestine primarily responsible for the majority of nutrient absorption in humans.
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