Question 1

Activation of pancreatic lipase requires

Accepted Answer

A)  Bile acids 
B)  Phospholipase A2 
C)  Pancreatic co-lipase 
D)  Bile pigments 
E)  Both A and C are correct 
A)  Bile acids 
B)  Phospholipase A2 
C)  Pancreatic co-lipase 
D)  Bile pigments 
E)  Both A and C are correct

Question 2

Pancreatic lipase

Accepted Answer

A)  Hydrolyzes triglycerides to fatty acids and 2-monoglyceride 
B)  Hydrolyzes phospholipids to fatty acids and lysophospholipids 
C)  Hydrolyzes cholesterol esters to fatty acids and cholesterol 
D)  Cleaves off choline from phospholipids to produce phosphatidic acid and choline 
E)  Hydrolyzes 2-monoglycerides to glycerol and fatty acids 
A)  Hydrolyzes triglycerides to fatty acids and 2-monoglyceride 
B)  Hydrolyzes phospholipids to fatty acids and lysophospholipids 
C)  Hydrolyzes cholesterol esters to fatty acids and cholesterol 
D)  Cleaves off choline from phospholipids to produce phosphatidic acid and choline 
E)  Hydrolyzes 2-monoglycerides to glycerol and fatty acids

Question 3

Galactose is liberated on the brush border by

Accepted Answer

A)  Isomaltase action on sucrose 
B)  Sucrase action on sucrose 
C)  Lactase action on lactose 
D)  Dextrinase action on starch 
E)  Amylase action on starch 
A)  Isomaltase action on sucrose 
B)  Sucrase action on sucrose 
C)  Lactase action on lactose 
D)  Dextrinase action on starch 
E)  Amylase action on starch

Question 4

Amino acid absorption across the brush border mem brane

Accepted Answer

A)  Uses both Na+-amino acid cotransport and faciliitated diffusion mechanisms 
B)  Always requires direct hydrolysis of ATP 
C)  Requires Na+ co-transport in all cases 
D)  Cannot accommodate dipeptides 
E)  Mainly transports dipeptides 
A)  Uses both Na+-amino acid cotransport and faciliitated diffusion mechanisms 
B)  Always requires direct hydrolysis of ATP 
C)  Requires Na+ co-transport in all cases 
D)  Cannot accommodate dipeptides 
E)  Mainly transports dipeptides

Question 5

In the intestine, fructose is

Accepted Answer

A)  A product of sucrose digestion 
B)  Actively transported across the brush border membrane 
C)  Taken up by active transport mechanism 
D)  Transported across the brush border by a Na+-cotransport mechanism 
E)  Both A and C are correct 
A)  A product of sucrose digestion 
B)  Actively transported across the brush border membrane 
C)  Taken up by active transport mechanism 
D)  Transported across the brush border by a Na+-cotransport mechanism 
E)  Both A and C are correct

Question 6

The gastric phase of protein digestion is due to

Accepted Answer

A)  Trypsin 
B)  Chrymotrypsin 
C)  Pepsin 
D)  Carboxypeptidase 
E)  Aminopeptidase 
A)  Trypsin 
B)  Chrymotrypsin 
C)  Pepsin 
D)  Carboxypeptidase 
E)  Aminopeptidase

Question 7

The greatest increase in surface area for absorption is due to

Accepted Answer

A)  Folds of Kerckring 
B)  Villus 
C)  Central lacteal 
D)  Microvilli 
E)  Basolateral mem brane 
A)  Folds of Kerckring 
B)  Villus 
C)  Central lacteal 
D)  Microvilli 
E)  Basolateral mem brane

Question 8

Which of the following is not found on the brush border membrane?

Accepted Answer

A)  SGLT1 
B)  GLUT5 
C)  GLUT2 
D)  Aminopeptidase 
E)  Sucrase 
A)  SGLT1 
B)  GLUT5 
C)  GLUT2 
D)  Aminopeptidase 
E)  Sucrase

Question 9

In mixed micelles

Accepted Answer

A)  Triglycerides occupy the surface 
B)  Bile acids coat the surface with the hydroxyl groups facing the water phase 
C)  Glycerol coats the surface 
D)  Lysolecithin is the main surface active component 
E)  The shape of the micelle is a hollow sphere 
A)  Triglycerides occupy the surface 
B)  Bile acids coat the surface with the hydroxyl groups facing the water phase 
C)  Glycerol coats the surface 
D)  Lysolecithin is the main surface active component 
E)  The shape of the micelle is a hollow sphere

Question 10

Transfer of single amino acids from the enterocyte to the blood occurs by

Accepted Answer

A)  Facilitated diffusion 
B)  Primary active transport 
C)  Secondary active transport linked to Na+ cotransport 
D)  Secondary active transport linked to H+ cotransport 
E)  Both A and C 
A)  Facilitated diffusion 
B)  Primary active transport 
C)  Secondary active transport linked to Na+ cotransport 
D)  Secondary active transport linked to H+ cotransport 
E)  Both A and C

Exam 59: Digestion and Absorption of the Macronutrients

Activation of pancreatic lipase requires

Pancreatic lipase

Galactose is liberated on the brush border by

Amino acid absorption across the brush border mem brane

In the intestine, fructose is

The gastric phase of protein digestion is due to

The greatest increase in surface area for absorption is due to

Which of the following is not found on the brush border membrane?

In mixed micelles

Transfer of single amino acids from the enterocyte to the blood occurs by

Physical Foundations Ii: Electrical Force Potential Capacitance and Current

Chemical Foundations I: Chemical Energy and Intermolecular Forces

Chemical Foundations Ii: Concentration and Kinetics

Diffusion

Electrochemical Potential and Free Energy

Cell Structure

Dna and Protein Synthesis

Protein Structure

Biological Membranes

Passive Transport and Facilitated Diffusion

Active Transport: Pumps and Exchangers

Osmosis and Osmotic Pressure

Cell Signaling

ATP Production I: Glycolysis

Atp Production Ii: Tca Cycle and Oxidative Phosphorylation

Atp Production Iii: Fatty Acid Oxidation and Amino Acid Oxidation

Origin of the Membrane Potential

The Action Potential

Propagation of the Action Potential

Skeletal Muscle Mechanics

Contractile Mechanisms in Skeletal Muscle

Neuromuscular Junction and Ec Coupling

Muscle Energetics Fatigue and Training

Smooth Muscle

Organization of the Nervous System

Cells Synapses and Neurotransmitters

Cutaneous Sensory Systems

Spinal Reflexes

Balance and Control of Movement

the Chemical Senses

Hearing

Vision

Autonomic Nervous System

Overview of the Cv System and Blood

Plasma and Red Blood Cells

White Blood Cells and Inflammation

The Heart As a Pump

Cellular Basis of Cardiac Contractility

the Cardiac Function Curve

Vascular Function: Hemodynamics

Microcirculation and Solute Exchange

Regulation of Perfusion

Integration of Cardiac Output and Venous Return

Regulation of Arterial Pressure

Mechanics of Breathing

Lung Volumes and Airway Resistance

Gas Exchange in the Lung

Oxygen and Carbon Dioxide Transport

Acid Base Physiology I Bicarbonate Buffers and Respiratory Compensation

Control of Ventilation

Anatomy and Renal Overview

Glomerular Filtration

Tubular Reabsorption and Secretion

Concentration and Dilution of Urine

Mouth and Esophagus

The Stomach

Intestinal and Colonic Motility

Pancreatic and Biliary Secretion

Energy Balance and Regulation of Food Intake

General Principles of Endocrinology

Hypothalamus and Pituitary Gland

The Thyroid Gland

The Endocrine Pancreas

The Adrenal Cortex

The Adrenal Medulla

The Calcitropic Hormones

Calcium and Phosphorus Homeostasis Ii

Female Reproductive Physiology

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