Practice Question
Where in the human body are most nutrients absorbed?
Answer Choices:
Correct Answer:
Small intestine.
Rationale:
🍽️The small intestine (duodenum, jejunum, ileum) is the primary site of nutrient absorption in humans.
🍽️Villi and microvilli create a massive surface area (brush border), dramatically enhancing absorption efficiency.
🍽️The duodenum handles most iron and calcium uptake; the jejunum absorbs the bulk of carbohydrates, proteins, and lipids.
🍽️The ileum specializes in vitamin B₁₂–intrinsic factor complexes and bile salts for enterohepatic recycling.
🍽️Segmental contractions and rich capillary/lymphatic networks optimize contact time and transport of digested nutrients into circulation.
Want to practice more questions like this?
This question is from HESI Admission Assessment (A²) Exam Anatomy & Physiology which contains 30 questions.
More Questions from This Exam
Which process is increased when the sympathetic nervous system is stimulated?
Answer Choices:
How many days is the average menstrual cycle?
Answer Choices:
What do ceruminous glands secrete?
Answer Choices:
Why are the hydrochloric acid and digestive enzymes from the stomach unable to digest the stomach itself?
Answer Choices:
A professional boxer gets punched in the nose resulting in a deviated septum. Which bone is most likely to be involved?
Answer Choices:
From Exam
HESI Admission Assessment (A²) Exam Anatomy & Physiology
30 Questions
View Full Exam Start PracticingQuestion Details
- Category: HESI A2
- Subcategory: Anatomy & Physiology Exam(s)
- Domain: Anatomy & Physiology~2025
- Answer Choices: 4