题目内容

During active transport, what kind of protein binds to a substance to help move the substance across the plasma membrane?

A. carrier
B. channel
C. intracellular
D. receptor

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Both diffusion and osmosis are examples of passive transport. Both of the processes move from high concentration to low concentration until equilibrium is reached. What is the difference between these two types of passive transport?

A. Diffusion moves water across the membrane.
B. Osmosis is movement of small particles.
C. Osmosis is movement of water molecules.
D. Osmosis is movement of gas molecules.

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In order for the plasma membrane to be semipermeable, the phospholipid molecules in the membrane are arranged with...

A. hydrophobic heads and hydrophilic tails.
B. hydrophilic heads and hydrophobic tails.

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There are different types of white blood cells that ingest bacteria and non-cellular debris. Through what process is this possible?

A. exocytosis
B. phagocytosis
C. pinocytosis
D. facilitated diffusion

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Some organisms such a paramecium, a protist, have osmotic problems due to their environment. They have an adaptation for osmoregulation to control the balance of water to maintain homeostasis. What specialized organelle do they have to help maintain their internal environment?

A. contractile vacuole
B. central vacuole
C. mitochondrion
D. cell wall

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During active transport, what kind of protein binds to a substance to help move the substance across the plasma membrane?

A. carrier B. channel C. intracellular D. receptor

Both diffusion and osmosis are examples of passive transport. Both of the processes move from high concentration to low concentration until equilibrium is reached. What is the difference between these two types of passive transport?

In order for the plasma membrane to be semipermeable, the phospholipid molecules in the membrane are arranged with...

There are different types of white blood cells that ingest bacteria and non-cellular debris. Through what process is this possible?

Some organisms such a paramecium, a protist, have osmotic problems due to their environment. They have an adaptation for osmoregulation to control the balance of water to maintain homeostasis. What specialized organelle do they have to help maintain their internal environment?

A. carrier
B. channel
C. intracellular
D. receptor