10 Questions
What type of transport mechanism is responsible for deriving salt and sugar (followed by water) into the enterocytes?
Active transport
Which of the following is a characteristic of the cell membrane?
Semi-permeable, allowing passage of lipid-soluble substances and preventing passage of water and water-soluble ones
In the context of cell membranes, what do proteins (integral or peripheral) act as?
Channels, carriers, pumps, enzymes, receptors
What causes a five-year-old child, known case of lactose intolerance, to develop diarrhea whenever he drinks milk?
Inability to digest lactose due to deficiency of the enzyme lactase
Which type of transport mechanism moves molecules across a cell membrane from a region of lower concentration to a region of higher concentration, requiring energy?
Active transport
Which transport mechanism requires energy?
Facilitated diffusion
What is the primary difference between simple diffusion and facilitated diffusion?
Protein carriers are needed in facilitated diffusion but not in simple diffusion
In which type of transport does a substance move against its chemical or electrical gradient, with consumption of energy and usage of a carrier?
Primary active transport
What is the role of exocytosis in cell function?
For the secretion of proteins synthesized within the cell
What is the driving force for secondary active transport?
Another (driving) substance that is transported down its gradient
Test your knowledge of transport mechanisms across cell membranes with this quiz. Learn about passive and active transport mechanisms and their differences. Explore case-based learning scenarios to apply your understanding.
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