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Questions and Answers
What type of transport mechanism is responsible for deriving salt and sugar (followed by water) into the enterocytes?
What type of transport mechanism is responsible for deriving salt and sugar (followed by water) into the enterocytes?
- Passive transport
- Facilitated diffusion
- Active transport (correct)
- Osmosis
Which of the following is a characteristic of the cell membrane?
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 (correct)
- Impermeable, preventing the passage of all substances
- Fully permeable, allowing passage of all substances equally
- Permeable to water and water-soluble substances only
In the context of cell membranes, what do proteins (integral or peripheral) act as?
In the context of cell membranes, what do proteins (integral or peripheral) act as?
- Structural components only
- Waste disposal units for the cell
- Energy sources for the cell
- Channels, carriers, pumps, enzymes, receptors (correct)
What causes a five-year-old child, known case of lactose intolerance, to develop diarrhea whenever he drinks milk?
What causes a five-year-old child, known case of lactose intolerance, to develop diarrhea whenever he drinks milk?
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?
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?
Which transport mechanism requires energy?
Which transport mechanism requires energy?
What is the primary difference between simple diffusion and facilitated diffusion?
What is the primary difference between simple diffusion and facilitated 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?
In which type of transport does a substance move against its chemical or electrical gradient, with consumption of energy and usage of a carrier?
What is the role of exocytosis in cell function?
What is the role of exocytosis in cell function?
What is the driving force for secondary active transport?
What is the driving force for secondary active transport?
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