Osmosis, Diffusion and Active Transport

Which if the following forms of molecule movement require energy? ATP

• Osmosis

• Passive Transport

• Diffusion

• Active Transport

In order for osmosis to happen there needs to be a _________ permeable membrane for the water molecules to pass through.

Answer explanation

Phasing through objects. That is partially permeable or semi-permeable.

During osmosis and diffusion molecules will move from areas of _________ concentration to low concentration.

Hypotonic means the cell is

• swelling

• freezing

• shrinking

• balanced

Which description best identifies this type of cellular transport?

• Active transport, because energy is being used to move molecules against the concentration gradient

• Facilitated diffusion, because energy is being used to move molecules with theconcentration gradient

• Osmosis, because energy is not being used to move molecules with the concentration gradient

• Endocytosis, because energy is not being used to move molecules against theconcentration gradient

In a study of physical endurance, researchers observed significant increases in the heart rates and breathing rates of participants immediately after they engaged in strenuous exercise. Which statement best explains the increase in the heart rate and the breathing rate during exercise?

• The water concentration in the blood increases.

• Body cells require increased oxygen as energy is expended.

• Muscle cells increase in temperature and require fluid to reduce the temperature.

• An increase in muscle activity causes increases in glucose levels in red blood cells.

Tags

NGSS.HS-LS1-3

Which statement describes the process of osmosis in an animal?

• Sugar molecules move across the plasma membrane until the cell has enough energy to grow.

• Water molecules move across the plasma membrane until solute concentrations are equal.

• Ions move across the plasma membrane until equal.

• Enzymes move across the plasma membrane until the cell has completed metabolism.

Which table correctly identifies how the plasma membrane contributes to the maintenance of cellular homeostasis?

• A

• B

• C

• D

Tags

NGSS.HS-LS1-3

What conditions cause the contractile vacuole of this organism to fill with water?

• The concentration of water is greater outside the cell then inside.

• The temperature of water in the vacuole is higher.

• The concentration of water inside the cell is the same as the outside.

• The temperature of water in the vacuole is lower.

Tags

NGSS.MS-LS1-2