Worksheets3.3.3 Absorption
Total questions: 15
Worksheet time: 8mins
What is required for the co-transport of amino acids into epithelial cells in the ileum?
Potassium ions
Sodium ions
Calcium ions
Chloride ions
How do amino acids move across the epithelial cell into the capillaries?
Active transport
Simple diffusion
Facilitated diffusion
Osmosis
What maintains the concentration gradient of sodium ions in the epithelial cells?
Sodium-glucose pump
Sodium-potassium pump
Calcium pump
Proton pump
Which molecules are co-transported with sodium ions into epithelial cells in the small intestine?
Amino acids
Glucose
Fatty acids
Glycerol
What are the products of lipid digestion?
Amino acids and peptides
Monosaccharides and disaccharides
Fatty acids, monoglycerides, and glycerol
Nucleotides and nucleosides
What is the role of micelles in lipid absorption?
They transport glucose molecules
They aid the transport of monoglycerides and fatty acids to the epithelial cells
They break down proteins into amino acids
They facilitate the absorption of vitamins
How do monoglycerides and fatty acids enter the epithelial cells?
Active transport
Facilitated diffusion
Simple diffusion
Endocytosis
What happens to longer fatty acid chains within the epithelial cells?
They are directly absorbed into the blood
They recombine with monoglycerides and glycerol to form triglycerides
They are broken down into smaller molecules
They are stored as energy reserves
What structure do triglycerides form to be transported in the body?
Micelles
Chylomicrons
Liposomes
Vesicles
Where are chylomicrons transported after being formed in the epithelial cells?
Directly into the bloodstream
Into the lymphatic system via lacteals
Into the liver for processing
Into the stomach for further digestion
What is the primary function of the sodium-potassium pump in epithelial cells?
To transport glucose into the cells
To maintain the concentration gradient of sodium ions
To facilitate the absorption of water
To break down proteins
Which of the following is NOT a component of chylomicrons?
Phospholipids
Cholesterol
Triglycerides
Amino acids
How do glucose molecules enter the capillaries from the epithelial cells?
Active transport
Facilitated diffusion
Simple diffusion
Endocytosis
What is the role of bile salts in lipid absorption?
They break down proteins into amino acids
They emulsify fats to form micelles
They transport glucose molecules
They facilitate the absorption of vitamins
Which process is responsible for the movement of molecules down their concentration gradient?
Active transport
Facilitated diffusion
Endocytosis
Exocytosis
