Homeostasis and Cell Transport Review

These flashcards cover key concepts and vocabulary related to homeostasis and cell transport as discussed in the lecture.

Phospholipid Bilayer

A double layer of phospholipids that makes up the cell membrane.

Hydrophilic

Substances that attract water; they are water-attracting.

Hydrophobic

Substances that repel water; they are water-repelling.

Osmosis

The diffusion of water across a selectively permeable membrane.

Isotonic

A solution where the concentration of solute is the same inside and outside the cell.

Hypertonic

A solution where the concentration of solute is higher outside the cell than inside.

Hypotonic

A solution where the concentration of solute is lower outside the cell than inside.

Selectively Permeable

A property of the cell membrane that allows certain substances to pass through while blocking others.

Dynamic Equilibrium

A state where the concentration of substances is balanced and does not change over time.

Negative Feedback Loop

A process that counteracts a change to bring the system back to its set point.

Positive Feedback Loop

A process that amplifies a change or deviation from the norm, leading to a greater change.

Exocytosis

The process by which a cell expels materials through vesicles that fuse with the plasma membrane.

Endocytosis

The process by which a cell takes in materials by engulfing them in a vesicle.

Thermoregulation

The process of maintaining an internal temperature within a tolerable range.