Question 1

Muscle cells require high concentrations of calcium to function properly. As a result, these cells use _____ transport to move calcium from areas of low concentration outside the cell into the cytoplasm.

Accepted Answer

The answer of Muscle cells require high concentrations of calcium...

Question 2

Water moves across a membrane from a hypotonic solution to a _____ solution.

Accepted Answer

The answer of Water moves across a membrane from a...

Question 3

Channel proteins provide a means for large _____________ [hydrophobic or hydrophilic] molecules to move across the plasma membrane.

Accepted Answer

The answer of Channel proteins provide a means for large...

Question 4

When the solute concentration outside of a cell is equal to the solute concentration inside of the cell, the cell is in a(n) ____________ solution.

Accepted Answer

The answer of When the solute concentration outside of a...

Question 5

_____________ junctions act as protein "hooks" between cells in heart muscle.

Accepted Answer

The answer of _____________ junctions act as protein "hooks" between...

Question 6

When you eat a meal, cells in your pancreas deliver insulin by the process of _________.

Accepted Answer

The answer of When you eat a meal, cells in...

Question 7

Even though the amount of water in a cell remains constant in an isotonic solution, water is constantly moving both ways across the plasma membrane by the process of ___________.

Accepted Answer

The answer of Even though the amount of water in...

Question 8

The passive movement of water across a selectively permeable membrane is called ________.

Accepted Answer

The answer of The passive movement of water across a...

Question 9

The viscous coating found around most animal cells is called the extracellular _________.

Accepted Answer

The answer of The viscous coating found around most animal...

Question 10

The principle of cell _______ is that different cells in the same organism may have different functions.

Accepted Answer

The answer of The principle of cell _______ is that...

Question 11

Cells in our liver take up cholesterol by receptor-mediated _____________.

Accepted Answer

The answer of Cells in our liver take up cholesterol...

Question 12

The various connections between cells including cell junctions and signaling molecules allow the cells in a multi-cellular organism to "talk" to each other, a principle known as cell-to-cell _______.

Accepted Answer

The answer of The various connections between cells including cell...

Question 13

A concentration ______ is said to exist when a molecule is more abundant in one area than it is in another.

Accepted Answer

The answer of A concentration ______ is said to exist...

Question 14

Active carrier proteins use energy to carry passive carrier proteins into cells.

Accepted Answer

This statement is incorrect. Active carrier proteins do use energy to transport molecules or ions across a membrane against their concentration gradient, but they do not carry other carrier proteins into cells. Passive carrier proteins, also known as facilitative diffusion proteins, use the concentration gradient to transport solutes into cells without the need for energy expenditure.

Question 15

Receptors in target cells can be located in the plasma membrane, the cytosol, or the __________.

Accepted Answer

The answer of Receptors in target cells can be located...

Question 16

The concentration of solutes is higher within the mitochondria than it is in the cytosol. The cytosol is ______ [hypertonic, hypotonic, or isotonic] to the inside of the mitochondrion.

Accepted Answer

The answer of The concentration of solutes is higher within...

Question 17

Channel proteins require energy for transporting molecules across the plasma membrane

Accepted Answer

Channel proteins are passive transporters that do not require energy to move molecules across the plasma membrane. They rely on the concentration gradient of molecules to allow them to pass through the channel. Active transporters, on the other hand, do require energy to move molecules against their concentration gradient.

Question 18

After entering its target cell, a hormone binds to its receptor and interacts with the cell's DNA, resulting in the production of a specific _______.

Accepted Answer

The answer of After entering its target cell, a hormone...

Question 19

Hydrophilic signaling molecules interact with cells by interacting with cell surface _____.

Accepted Answer

The answer of Hydrophilic signaling molecules interact with cells by...

Question 20

During ___________ endocytosis, specific substances interact with proteins located on the plasma membrane of the cell.

Accepted Answer

The answer of During ___________ endocytosis, specific substances interact with...

Quiz 6: Cell Membranes, Transport, and Communication