Front

What is the primary function of lipids in a cell membrane?

Back

Lipids form the majority of a cell membrane's structure and help keep the internal cellular environment separate from the external environment.

Front

What hormone is produced by the pancreas to raise blood glucose levels?

Back

Glucagon is the hormone produced by the pancreas that raises blood glucose levels.

Front

What does it mean for matter to be conserved in a chemical reaction?

Back

Matter is conserved in a chemical reaction when the number of atoms is the same on both sides of the equation.

Front

In active transport, molecules move from an area of __________ concentration to an area of __________ concentration.

Back

In active transport, molecules move from an area of low concentration to an area of high concentration.

Front

What is the main function of phospholipids in a cell?

Back

Phospholipids form the cell membrane.

Front

Define active transport in cellular processes.

Back

Active transport is the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, requiring energy.

Front

What is the role of proteins in the cell membrane?

Back

Proteins in the cell membrane assist in transport, act as receptors, and provide structural support.

Front

What is the difference between passive and active transport?

Back

Passive transport does not require energy and moves substances from high to low concentration, while active transport requires energy to move substances from low to high concentration.

Front

What is the significance of glucagon in blood sugar regulation?

Back

Glucagon raises blood glucose levels by promoting the conversion of glycogen to glucose in the liver.

Front

What is the structure of a phospholipid?

Back

A phospholipid consists of a hydrophilic (water-attracting) 'head' and two hydrophobic (water-repelling) 'tails'.