Osmosis is a form of passive transport. Which defines osmosis?(1 point)
Responses
the movement of water across a semipermeable membrane down a concentration gradient from high to low, using no energy
the movement of water across a semipermeable membrane down a concentration gradient from high to low, using no energy
the movement of water across a semipermeable membrane up a concentration gradient from low to high, using no energy
the movement of water across a semipermeable membrane up a concentration gradient from low to high, using no energy
the movement of water across a semipermeable membrane up a concentration gradient from low to high, using energy
the movement of water across a semipermeable membrane up a concentration gradient from low to high, using energy
the movement of water across a semipermeable membrane down a concentration gradient from high to low, using energy
the movement of water across a semipermeable membrane down a concentration gradient from high to low, using no energy
Endocytosis and exocytosis are forms of active transport. What is active transport?(1 point)
Responses
the movement of molecules down a concentration gradient from high to low, using energy
the movement of molecules down a concentration gradient from high to low, using energy
the movement of molecules down a concentration gradient from high to low, using no energy
the movement of molecules down a concentration gradient from high to low, using no energy
the movement of molecules up a concentration gradient from low to high, using no energy
the movement of molecules up a concentration gradient from low to high, using no energy
the movement of molecules up a concentration gradient from low to high, using energy
the movement of molecules up a concentration gradient from low to high, using energy
What does it mean for an environment to be isotonic?(1 point)
Responses
The concentration of solute is greater in the environment than inside the cell.
The concentration of solute is greater in the environment than inside the cell.
The concentration of solute in the environment is different from the concentration inside the cell.
The concentration of solute in the environment is different from the concentration inside the cell.
The concentration of solute is greater inside the cell than in the environment.
The concentration of solute is greater inside the cell than in the environment.
The concentration of solute in the environment and the concentration inside the cell are at equilibrium.
The concentration of solute in the environment and the concentration inside the cell are at equilibrium.
Cells dispose of large waste molecules through a process called(1 point)
Responses
diffusion.
diffusion.
osmosis.
osmosis.
endocytosis.
endocytosis.
exocytosis.
exocytosis.
exocytosis
A cell is dropped into a saltwater solution and shrivels up. You infer that, compared to the cell, the type of saltwater solution is(1 point)
Responses
hypertonic.
hypertonic.
hypotonic.
hypotonic.
tonic.
tonic.
isotonic.
isotonic.
hypertonic
The correct answer is:
the movement of water across a semipermeable membrane down a concentration gradient from high to low, using no energy.
To determine the correct answer, we can break down the options and analyze them:
Option 1: the movement of water across a semipermeable membrane down a concentration gradient from high to low, using no energy.
This option accurately describes osmosis, where water molecules move across a semipermeable membrane from an area of higher concentration to an area of lower concentration, requiring no energy.
Option 2: the movement of water across a semipermeable membrane up a concentration gradient from low to high, using no energy.
This option incorrectly describes osmosis because it suggests that water moves against its concentration gradient, which is not the case. Osmosis occurs down a concentration gradient, from high to low.
Option 3: the movement of water across a semipermeable membrane up a concentration gradient from low to high, using energy.
This option suggests that water moves against its concentration gradient and requires energy, which is not true for osmosis. Osmosis is a passive transport process, meaning no energy is required for water to move across the membrane.
Option 4: the movement of water across a semipermeable membrane down a concentration gradient from high to low, using energy.
This option correctly describes the movement of water down a concentration gradient from high to low but incorrectly states that it requires energy. In osmosis, no energy is used.
Therefore, based on the correct definition of osmosis as the movement of water across a semipermeable membrane down a concentration gradient from high to low, using no energy, Option 1 is the correct answer.