Biology Final Exam Review 2023

The primary component of the plasma membrane is the group of lipids called

• prostaglandins

• cholesterol

• phospholipids

• carbohydrate

"Water loving"....the outside (purple) part of the plasma membrane has this trait.

• Hydroloric

• Hydroelectric

• Hydrophilic

• Hydrophobic

"water fearing".....the inside (blue) part of the plasma membrane has this trait.

• Hydroloric

• Hydroelectric

• Hydrophilic

• Hydrophobic

What do we call our current model of the cell membrane?

• the fluid mosaic model

• the major mobility model

• the crazy cell model

• the cell theroy model

Controls the passage of materials inside and outside of the cell

• Plasma/Cell Membrane

• Cytoplasm

• Cell Wall

• Endoplasmic reticulum

Which term describes the relatively constant internal physical conditions of an organism?

• permeability

• homeostasis

• specialization

• unicellularity

Which of the following molecules pass easily through the cell membrane, requiring little extra help or energy? Select all that apply.

• glucose

• oxygen

• carbon dioxide

• sodium

The ability to allow only certain molecules into or out of the cell.

• permeability

• impermability

• unpermeability

• semipermeablity

Passive Transport

• Does require cell energy

• Does NOT require cell energy

What is diffusion?

• when molecules move from a low concentration to a high concentration 

• when molecules move from a high concentration to a low concentration.

• no movement 

• molecules move everywhere