Cell Membranes, Diffusion, and Osmosis

Maintaining a stable internal environment is a key characteristic of all ______ organisms.

The different internal composition of a cell compared to its environment is largely due to the properties of the cell ______.

Cell membranes are primarily composed of lipids and ______, the former forming a bilayer.

The presence of pores, channels, or pumps in the membrane allows it to be selectively ______.

[Blank] is the passive movement of particles from an area of high concentration to an area of low concentration.

[Blank] is a special case of diffusion involving the movement of water across a selectively permeable membrane.

Movement of particles against a concentration gradient, requiring energy, is known as ______ transport.

Active transport utilizes protein ______ to move substances across the membrane, powered by energy from respiration.

The rate of diffusion is generally positively correlated with an increasing surface area to ______ ratio, up to a certain point.

Solutions with a high concentration of dissolved substances have a low water ______.

Water moves from areas of high water potential to areas of low water potential by ______.

In concentration gradients, a steeper gradient can be achieved by making the concentration ______.

Cells taking up or excreting substances via diffusion is a ______ process that doesn't require energy expenditure.

The energy required for active transport is generated in the ______ by the process of respiration.

[Blank] is a type of active transport where the cell membrane surrounds a molecule, forming a vesicle to bring it into the cell.

During active transport, a molecule binds to a protein pump that changes ______ using energy to facilitate its movement.

Cellular ______ involves the movement of substances from areas of high concentration to areas of low concentration without energy expenditure.

Solutions lacking dissolved molecules have the highest water ______, representing 100% water.

The selective permeability of cell membranes is due to ______ and proteins that regulate substance passage.

Organisms rely on the movement of particles from areas of high concentration to areas of low concentration to ______ or excrete substances.

Osmosis specifically refers to the diffusion of ______ across a selectively permeable membrane.

To move substances against a concentration gradient, cells use active transport, requiring the expenditure of ______.

An increasing surface area to volume ratio facilitates faster diffusion rates, peaking at around ______ before decreasing.

Active transport is crucial for moving substances from low to high concentrations, countering the concentration ______.

The process of ______ involves the cell membrane engulfing a molecule and forming a vesicle to bring it inside.

Protein pumps change shape using energy during active transport to move specific ______ across the cell membrane.

Living organisms maintain a consistent internal environment to ensure stable and optimal ______ of cells.

Cell membranes possess a selectively permeable nature due to the presence of lipids and ______, controlling what enters and exits cells.

Water moves from a high to low water potential on a membrane through ______.

Using energy in respiration, ______ transport moves particles from a low to a high concentration through the membrane.

In a high concentration gradient, a very ______ concentration is needed to make it even steeper.

[Blank] is known as a passive transport that doesnt require energy, but moves from areas of high concentration to low concentration.

Generated in the mitochondria, active transport requires the expenditure of ______ and is a process of respiration.

When a molecule moves towards a membrane, surrounding it and fusing with itself to form a ______/vesicle, this is called endocytosis.

When a molecule bind to a protein ______, it may change shape using energy to then move through to the other side of the membrane.

With high water potential towards a low water potential, ______ will occur across the membrane.

The fats (phospholipids) form a ______ and the proteins form pores, channels or even pumps.

Active Transport uses ______ from respiration using protein pumps across the membrane.

The effect of an increasing surface area and volume ratio on the rate of ______ is that generally, as the increasing ratio went up, so did the rate of diffusion.

Solutions which are just water with no dissolved molecules have the highest possible water concentration, or water ______.