Question 1

Which type of nutrient absorption moves molecules from high to low concentration through a protein channel, but does not require energy?

Accepted Answer

Facilitated diffusion

Question 2

A nutrient is absorbed into the lacteal of the small intestine and then enters the lymphatic system before reaching the bloodstream. Which type of nutrient is this most likely to be?

Accepted Answer

Fat-soluble vitamin

Question 3

Which process requires energy to move nutrients against their concentration gradient?

Accepted Answer

Active transport

Question 4

A patient has a genetic mutation that impairs the function of protein channels in their intestinal cells. Which type of nutrient absorption would be most affected?

Accepted Answer

Facilitated diffusion

Question 5

Which equation best represents the movement of molecules during passive diffusion?

Accepted Answer

$ \Delta C = C_{high} - C_{low} $

Question 6

Which of the following nutrients is absorbed directly into the blood capillaries of the small intestine?

Accepted Answer

Water-soluble vitamins

Question 7

Endocytosis is best described as:

Accepted Answer

Cell membrane engulfing nutrients to bring them inside

Question 8

Which of the following statements is TRUE regarding the absorption of amino acids?

Accepted Answer

Amino acids are absorbed into the blood capillaries

Question 9

A nutrient moves from the digestive tract into the cells of the intestinal wall using a carrier protein, but without energy input. Which process is this?

Accepted Answer

Facilitated diffusion

Question 10

Which of the following is NOT absorbed through the hepatic portal vein after being absorbed?

Accepted Answer

Fat-soluble vitamins

Question 11

Which process is most likely to be used for the absorption of large protein molecules by intestinal cells?

Accepted Answer

Endocytosis

Question 12

If a nutrient is absorbed into the blood and then transported to the liver before entering the general circulation, which route does it follow?

Accepted Answer

Hepatic portal vein

Question 13

Which of the following best describes the absorption of glucose in the small intestine?

Accepted Answer

Absorbed into the blood capillaries

Question 14

Which process allows nutrients to move from high concentration to low concentration directly through the membrane without the help of a protein?

Accepted Answer

Passive diffusion

Question 15

A nutrient requires a carrier protein and energy to be absorbed into the intestinal cell. Which process is this?

Accepted Answer

Active transport

Question 16

Which of the following is a key difference between the absorption of water-soluble and fat-soluble nutrients?

Accepted Answer

Water-soluble nutrients enter the blood capillaries, while fat-soluble nutrients enter the lymphatic system

Question 17

Which formula represents the energy requirement for active transport?

Accepted Answer

$ \Delta G > 0 $

Question 18

A nutrient is absorbed into the cells of the villi and then enters the lymphatic system. Which of the following is most likely true?

Accepted Answer

The nutrient is fat-soluble

Question 19

Which of the following statements about facilitated diffusion is correct?

Accepted Answer

It uses a protein channel to move nutrients from high to low concentration

Question 20

Which process is most likely to be impaired if a person has a deficiency in ATP production?

Accepted Answer

Active transport

Nutrient Absorption and Transport: Mechanisms and Pathways

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