Lipid bilayers - Study guides, Class notes & Summaries

What is the basic framework of biological membranes? Ans: The phospholipid bilayer What are the 3 components of the phospholipid bilayer? Ans: Phospholipids, proteins, carbohydrates How is the phospholipid bilayer divided? Ans: Into asymmetrical leaflets What does it mean for the membrane to be semifluid? Ans: Phospholipids move laterally and rotationally, but not in 3 dimensions (no ATP required) What does it mean for phospholipids to flip flop? Ans: Phospholipids turn upside down an...

Phospholipid Bilayer Ans: Double layer that separates internal and external environments of the cell Amphipathic Ans: Molecules with hydrophilic heads and hydrophobic tails Integral Proteins Ans: Proteins that penetrate the hydrophobic interior of the lipid bilayer Peripheral Proteins Ans: Proteins loosely bound to the surface of the membrane Transmembrane Proteins Ans: Proteins that span the membrane 2 Six Major Functions of Membrane Proteins Ans: Transport, enzymatic activity, sign...

Phospholipid Bilayer Exam Questions And Answers...

Homeostasis Ans: The process of maintaining balance in an organisms internal environment 1. Separates inside of cell from outside of cell 2. Controls the substances that leave and enter the cell Ans: 2 cell membrane functions Their cell membrane allows nutrients to come inside and allows waste to leave Ans: How do cells maintain homeostasis? Phospholipid Ans: A molecule with a glycerol backbone, 2 fatty acid chains, and a phosphate group A glycerol backbone, 2 fatty acid chains, and a p...

Cell membrane Ans: Flexible and allows a unicellular organism to move Homeostasis Ans: Balanced internal condition of cells Equilibrium Ans: (Homeostasis) maintained by plasma membrane controlling what enters and leaves cell Functions of plasma membrane Ans: Protective barrier, regulates transport in ad out of cell, allows cell recognition, provides anchoring sites for filaments of cytoskeleton, provides binding site for enzymes, contains cytoplasm Phospholipids 2 Ans: Make up ce...

Phospholipid BilayerPhospholipid - correct answer consists of a somewhat circular phosphate group head, and two long , fatty acid chain tails Hydrophilic Head - correct answer Its attracted to water and arranged to be closest to the water molecules Hydrophobic Tail - correct answer Are repelled by water and arranged to be farthest from water molecules Carbohydrate Chain - correct answer substance on the plasma membrane helps identify chemical signals from outside the cell and define cel...

Cholesterol Ans: Only found in animal cells. Cholesterol allows the membrane to be more fluid and bends lipids together for selectivity Peripheral Protein: Ans: They're hydrophilic because they are not embedded in the membrane and act as receptor/communication functions of the cell since they are bound to the surface Glycolipids Ans: Carbs attached to lipids Glycoproteins Ans: Carla attached to proteins Intergral Proteins Ans: Connect inside of cell to the outside 2 Carrier Prote...

Exam 1: NURS 615/ NURS615 (Latest 2024/ 2025 Update) Advanced Pharmacotherapeutics Complete Guide |Qs & As| 100% Correct| Grade A (Verified Answers) Q: Explain first pass metabolism Answer: much of the drug is lost in the absorption process. The liver metabolizes many drugs, thus reduces the bio-availability of the drug. Q: What is the fasted route of absorption: Answer: The fastest route of absorption is inhalation, and not as mistakenly considered the IV administration. ...

ADVANCED NUTRITION AND HUMAN METABOLISM 8TH EDITION BY SAREEN GROPPER, JACK SMITH, TIMOTHY CAR TEST BANK Chapter 01: The Cell: A Microcosm of Life Indicate the answer choice that best completes the statement or answers the question. 1. Membrane lipid bilayers consist primarily of . a. phospholipids b. cholesterol c. proteins d. saturated fatty acids e. enzymes 2. Which of the following is a common function of membrane proteins? a. receptors b. detoxifiers c. purifier d. neutron...