Homeostasis - Cell Transport

In the diagram of the plasma (cell) membrane shown below, which structures are indicated by letters A and B?

• A –– proteins; B –– lipids

• A –– fats; B –– carbohydrates

• A –– cellulose; B –– fats

• A –– water; B –– proteins

The diagram below represents the fluid mosaic model of a plasma membrane.

What do letters X and Y indicate?

• X indicates lipids and Y indicates proteins.

• X indicates pores and Y indicates cellulose.

• X indicates proteins and Y indicates lipids.

• X indicates nuclei and Y indicates ribosomes.

A characteristic common to both diffusion and active transport is that

• enzymes are required

• oxygen is moved across a membrane

• ATP is needed

• the movement of molecules occurs

Damage to which structure will most directly disrupt water balance within a single-celled organism?

• ribosome

• cell membrane

• nucleus

• chloroplast

Tags

NGSS.HS-LS1-3

Which structure is most directly responsible for maintaining homeostasis in all cells?

• chloroplast

• cell membrane

• centriole

• cell wall

Tags

NGSS.HS-LS1-3

The diagram below represents a portion of a cell

membrane.

The arrow indicates that the cell membrane is carrying out the process of

• respiration

• cell recognition

• diffusion

• active transport

The diagram below represents the results of the net movement of a specific kind of molecule across a living cell membrane.

The movement of molecules from side A to side B is an example of the process of

• active transport

• chromatography

• cellular respiration

• diffusion

The diagram below represents a cell and some molecules in its environment.

Which molecule would require the use of energy in order to be brought into the cell?

• 1

• 2

• 3

• 4

An investigation was set up to study the movement of water through a membrane. The results are shown in the diagram below.

Based on these results, which statement correctly predicts what will happen to red blood cells when they are placed in a beaker containing a water solution in which the salt concentration is much higher than the salt concentration in the red blood cells?

• The red blood cells will absorb water and increase in size.

• The red blood cells will lose water and decrease in size.

• The red blood cells will first absorb water, then lose water and maintain their normal size.

• The red blood cells will first lose water, then absorb water, and finally double in size.

Tags

NGSS.HS-LS1-3

A biologist observed a plant cell in a drop of water as shown in diagram A. The biologist added a 10% salt solution to the slide and observed the cell as shown in diagram B.

The change in appearance of the cell resulted from

• more salt moving out of the cell than into the cell

• more salt moving into the cell than out of the cell

• more water moving into the cell than out of the cell

• more water moving out of the cell than into the cell

Tags

NGSS.MS-LS1-2