Log inSign up

MCAT Biological and Biochemical Foundations of Living Systems Flashcards: 3b Digestive System Absorption Regulation

Study 3b Digestive System Absorption Regulation in MCAT Biological and Biochemical Foundations of Living Systems with focused flashcards that help you recognize the idea, recall the key rule, and apply it in practice-style prompts.

QUESTION

What is the primary apical mechanism for amino acid absorption in the small intestine?

Tap card or press Space to flip

ANSWER

Na+^{+}-dependent cotransport (secondary active transport). This mechanism leverages the sodium electrochemical gradient to efficiently transport amino acids into enterocytes for absorption.

1 / 25

MCAT Biological and Biochemical Foundations of Living Systems: Foundational Concept 3: Organ Systems and Homeostasis

You are hereDigestive System Structure, Absorption, Regulation (3B)25 cards

All flashcards

25 cards

What this deck covers

This deck focuses on 3b Digestive System Absorption Regulation, giving you a quick way to review the definitions, rules, and examples that matter most for MCAT Biological and Biochemical Foundations of Living Systems.

How to use these flashcards

Work through these flashcards in short sessions. Try to answer each prompt before flipping the card, then revisit any cards you miss until the explanation feels automatic.

Practice questions

1 of 50Practice questions for this set
In a study of carbohydrate absorption, researchers perfuse a short ileal segment with a solution containing 20 mM glucose. They compare two luminal conditions: (i) normal Na+ (140 mM) and (ii) low Na+ (10 mM), with osmolarity held constant using a non-absorbable solute. Definitions: SGLT-type transport uses the Na+ gradient to move glucose into enterocytes; GLUT-type transport is facilitated diffusion down a glucose gradient. Based on this model, which outcome is most consistent with lowering luminal Na+?
Choose an answer

Keep your progress across every deck

Free account · cards you mark are saved to it