Question 1

During ________ endocytosis,specific substances interact with proteins located in the plasma membrane of the cell.

Accepted Answer

The answer of During ________ endocytosis,specific substances interact with proteins...

Question 2

Cells suspended in a hypertonic solution will lose water.

Accepted Answer

In a hypertonic solution, the solute concentration is higher outside the cell than inside. Thus, the water will move out of the cell by osmosis, causing the cell to lose water and shrink.

Question 3

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

Accepted Answer

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

Question 4

Cells in the liver typically acquire cholesterol by receptor-mediated ________.

Accepted Answer

The answer of Cells in the liver typically acquire cholesterol...

Question 5

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 6

Osmoregulation refers to balancing water concentrations in organisms and cells.

Accepted Answer

Osmoregulation is the process of balancing the water and solute concentrations within an organism or a cell to maintain the proper functioning of cells and tissues.

Question 7

The various connections between cells,including cell junctions and signaling molecules,allow the cells in a multicellular 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 junctions...

Question 8

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

Accepted Answer

Active carrier proteins require energy to transport molecules or ions against their concentration gradient, while passive carrier proteins allow the movement of molecules or ions down their concentration gradient without the need for energy. Therefore, active carrier proteins do not use passive carrier proteins to enter cells.

Question 9

Protein-lined tunnels that span the small intercellular space separating adjacent cells and that allow the rapid and direct passage of ions and small molecules,including signaling molecules,are called ________.

Accepted Answer

The answer of Protein-lined tunnels that span the small intercellular...

Question 10

Channel proteins require energy for transporting molecules across the plasma membrane.

Accepted Answer

Channel proteins do not require energy for transporting molecules across the plasma membrane. They utilize a passive transport mechanism, allowing specific molecules to pass through based on their size and charge without the need for energy expenditure.

Question 11

The signaling molecules that interact with cell surface receptors cannot cross the plasma membrane and would generally be classified as large and/or________.

Accepted Answer

The answer of The signaling molecules that interact with cell...

Question 12

Active carrier proteins are not found in the same cells as passive carrier proteins.

Accepted Answer

This statement is false. Both active and passive carrier proteins can be found in the same cells. Examples include the sodium-potassium pump (active) and glucose transporter (passive) in human cells.

Question 13

Channel proteins provide a means for large,________ molecules to move across the plasma membrane without an expenditure of energy.

Accepted Answer

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

Question 14

Even though the concentration of water in a cell remains constant in an isotonic solution,the random movement of water molecules during ________ requires that water be constantly moving in both directions across the plasma membrane.

Accepted Answer

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

Question 15

Several types of lipoproteins exist;the best balance for cardiovascular health is achieved with ________ amount of LDL and ________ amount of HDL.

Accepted Answer

The answer of Several types of lipoproteins exist;the best balance...

Question 16

After eating a meal high in carbohydrates,the pancreas begins releasing the hormone insulin by the process of ________.

Accepted Answer

The answer of After eating a meal high in carbohydrates,the...

Question 17

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

Accepted Answer

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

Question 18

Passive carrier molecules often require active carrier proteins to provide amino acids for transport.

Accepted Answer

Passive carrier molecules facilitate the transport of substances across a cell membrane without the need for energy, unlike active transport which requires energy and often involves active carrier proteins.

Question 19

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 20

Cells that experience high mechanical stress,like heart cells,typically connect to one another using a(n)________ junction,allowing the stress to be distributed to a larger area.

Accepted Answer

The answer of Cells that experience high mechanical stress,like heart...

Quiz 4: Cell Membranes, Transport, and Communication