AP Biology Chapter 7 Membrane Function – Flashcards

Identify at least two substances that would need to move into a cell to maintain homeostasis.

Water and oxygen is needed to move into a cell to maintain homeostasis because it is used for __________.

Identify at least two substances that would need to move out of a cell to maintain homeostasis.

Water and carbon dioxide is needed to move out of a cell to maintain homeostasis because they are products of ________.

Are type 1 ions (which includes potassium and sodium) polar or nonpolar?

Are type 2 molecules (which includes glucose) polar or nonpolar?

Are type 3 molecules (which includes water and urea) polar or nonpolar?

Are type 4 molecules (which includes oxygen and carbon dioxide) polar or nonpolar?

Are type 1 ions (which includes calcium and chloride) small or large?

Are type 2 molecules (which includes glucose) small or large?

Are type 3 molecules (which includes water and urea) small or large?

Are type 4 molecules (which includes oxygen and carbon dioxide) small or large?

What is this?

The hexagon shape indicates that this is....

The three-pronged structure indicates that this is...

A square in the middle and two circles on the outside means that it is...

A circle with a plus sign in the middle means that it is...

Which substances are completely blocked by the membrane?

Which substances are able to pass freely through the membrane?

Which substances pass through the membrane with some difficulty?

Urea appears to pass through the membrane more easily than glucose. What characteristic of urea might help explain this observation?

Won't pass through the membrane because they are charged and polar and won't mix well with the phospholipid bilayer.

May be able to pass through the membrane if they also contain several carbon-based functional groups.

May be able to pass because it's small, but because they're polar, it will be difficult.

Can move through the membrane because it's nonpolar and can mix well with the phospholipid bilayer.

The process of molecules traveling through the membrane barrier from a location of high concentration to a location of low concentration.

When no energy is needed. Diffusion is a type of this.

It allows molecules to move across the membrane that usually can't.

Is the inner surface of the embedded protein likely to be polar or nonpolar?

When an embedded protein assists in the passive transport of molecules across a barrier in the direction of the concentrated gradient (from high concentration to low concentration).

The cell uses energy from ATP to move molecules across the membrane against the concentration gradient. Embedded proteins may also be involved in this.

Some embedded proteins are called aquaporins. What molecule do aquaporins assist in transporting across a membrane?

What type of molecule or ion is nitrogen gas and does it or does it not need a membrane protein?

What type of molecule or ion hydronium and does it or does it not need a membrane protein?

What type of molecule or ion is alanine (amino acid) and does it or does it not need a membrane protein?

What type of molecule or ion is sucrose and does it or does it not need a membrane protein?

What type of molecule or ion is bicarbonate and does it or does it not need a membrane protein?