Cells: The Living Units Dynamic Study Module

Pinocytosis is a type of__________.

endocytosis

By which method does the following move into the cell: molecules moving against the concentration gradient?

Active transport mechanisms

Match the type of membrane transport with the appropriate characteristic: Secondary active transport.

Driven indirectly by energy stored in concentration gradients of ions

Correctly match the term and definition: Vesicular transport that moves substances into cells.

Endocytosis

Which of the following pairs is a correct match?

Exocytosis: active membrane transport process

The sodium-potassium pump helps to maintain the concentration gradients for sodium and potassium ions across the plasma membrane. Select the true statement regarding the sodium-potassium pump.

For each molecule of ATP used, the pump moves three positively charged sodium ions out of the cell.

Which of the following binds to a specific receptor and initiates a response in a cell?

Ligand

Match the type of membrane transport with the appropriate characteristic: Primary active transport.

Movement of a substance that utilizes a carrier; energy comes directly from hydrolysis of ATP

By which method does the following move into the cell: Movement of large particles, bacteria, or cellular debris by endocytotic vesicle

Phagocytosis

Correctly match the term and definition: Endocytosis of a tiny quantity of extracellular fluid containing solute molecules.

Pinocytosis

The electrochemical gradient recognizes the effect of both electrical and concentration (chemical) forces. The electrochemical gradient applies to which of the following substances?

Sodium ions

Select the statement that is false regarding the resting membrane potential

The minus sign of the resting membrane potential indicates that the outside of the cell is negative compared to its inside.

Crenation takes place when a cell is placed in ____

a hypertonic solution