Anatomy and Physiology Chapter 3

Anatomy and Physiology Chapter 3 Practice Test|50 Questions with Detailed Solutions

Which of the following phrases best defines something that is hydrophobic? - answer-a substance that does not mix with water Which parts of a phospholipid are hydrophobic/ hydrophilic? - answer- If you were to throw many phospholipids into an aqueous solution, which of the following would you observe? - answer-phosphate heads and lipid tails would orient away from each other, with the phosphate heads facing either the extracellular or intracellular fluid and the tails facing each other ...

What are the building blocks of all plants and animals - answer-cells All of the following are membranous organelles EXCEPT - answer-microvilli and centrioles Most of the surface area of the plasma membrane consists of - answer-phospholipids Because of the chemical-structural composition, the plasma membrane is called a - answer-phospholipid bilayer The cytoskeleton gives the cell strength and rigidity and anchors the position of major organelles. What are the primary components of t...

Cell - Basic living units of all organisms Light Microscope(s) - Allows us to visualize the general features of a cell Electron Microscope(s) - Used to study the fine structures of a cell Higher magnification than an light microscope Scanning Electron Microscope(s) - Microscope that allows us to see the features of a cell's surface as well as the surfaces of internal structures Transmission Electron Microscope(s) - Microscope that allows us to see "through" parts...

Actin filaments (microfilaments) - small fibrils that forms a bundles, sheets or networks in the cytoplasm; for structure, support for microvilli, contractility and movement active transport - ATP-powered pumps combine with substances and move them across the plasma membrane; ATP is used; substances can be move from areas of lower concentration to higher concentration antiporter - carrier protein that moves two different ions of molecules in opposite directions across the plasma membrane ...