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Questions and Answers
What is the primary mechanism by which nonpolar molecules move through the plasma membrane?
What is the primary mechanism by which nonpolar molecules move through the plasma membrane?
- Active transport using ATP
- Facilitated diffusion
- Simple diffusion through the double phospholipid layers (correct)
- Simple diffusion through protein channels
Which of the following is a characteristic of active transport?
Which of the following is a characteristic of active transport?
- Movement of molecules against their concentration gradients (correct)
- Movement of molecules down their concentration gradients
- Movement of molecules from higher to lower concentrations
- No expenditure of cellular energy
What is the primary force that pushes water out of the capillary into the tissues?
What is the primary force that pushes water out of the capillary into the tissues?
- Osmotic pressure
- Colloid osmotic pressure
- Hydrostatic pressure (correct)
- Blood pressure
What is the primary cause of oedema?
What is the primary cause of oedema?
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What is the role of the synapse in nerve transmission?
What is the role of the synapse in nerve transmission?
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Which of the following ions is involved in the nerve action potential?
Which of the following ions is involved in the nerve action potential?
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