Cell Membranes: Functions and Structure

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26 Questions

Water is the universal ______

solvent

Osmosis is the movement of ______

water

Diffusion is the movement of a solute from a high to a low ______

concentration

We live in an isotonic solution where there is a similar concentration of solute inside and outside of the ______

cell

In a hypertonic solution, there is a high extracellular ______

solute

Glucose binds and transporter ratchets, opening to the inside of the cell and releasing ______

glucose

Membranes form a boundary with a lipid bilayer, which serves as a ______ barrier

permeability

The cell and nucleus are examples of membrane-bound ______

compartments

Cells actively pump sodium out and potassium in through ______ processes

transport

Membranes have receptors that can detect signals, enabling ______ processes

communication

In multicellular organisms, cells physically hang onto each other for ______ interactions

cell-to-cell

The fluid mosaic model describes membranes as fluid due to lateral ______

diffusion

The most common secondary structure spanning a membrane is the alpha ______

helix

Phospholipids have hydrophobic fatty acid tails and polar ______ groups

head

Integral membrane proteins are tightly integrated and considered an integral part of the ______

membrane

Simple diffusion does not require any help from proteins and is driven by a ______ gradient

down

The glucose transporter allows glucose to flow down its gradient from ______ concentration to low concentration

high

If all transporters are occupied, you have reached ______

Vmax

The sodium-potassium pump creates a high sodium gradient ______ the cell and high potassium gradient inside the cell

outside of

The energy used to move glucose in by active transport in the Na+-Glucose Symporter comes from the delta G of ______ diffusion

sodium

Mitochondria have their own ______

DNA

The final electron acceptor in cellular respiration is ______

oxygen

Acetyl CoA formation involves converting pyruvate to ______

Acetyl CoA

In the Citric Acid Cycle, acetyl CoA delivers 2 carbon acetyl groups into the ______

process

In the Citric Acid Cycle, the enzyme aconitase converts citrate to ______

isocitrate

Succinate dehydrogenase converts 4-carbon succinate to ______

fumarate

Explore the various functions of cell membranes, such as acting as a boundary and permeability barrier, organizing compartments, facilitating transport processes, and detecting signals through receptors.

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