Polar molecules diffusion - Study guides, Class notes & Summaries

cytoskeleton intracellular support, used in cell movement, moves organelles cells composed of plasma (cell membrane), cytoplasm, cytosol, nucleus, cytoskeleton cytosol clear gel within the sometimes, referred to as intracellular fluid cytoplasm fluid and components between the nucleus and cell membrane, includes the cytosol and cytoskeleton molecules embedded in phospholipid layer transmembrane proteins peripheral proteins cholesterol sugars (glycolipids, glycoprotein...

Explain what happens in Tay-Sachs disease. ~ When lysosomes lack one of the digestive enzymes that normally breaks down a toxic lipid in the brain, the lipid builds up and can lead to intellectual disability and death. eukaryotic cells/prokaryotic cells ~ The three main differences are the size (prokaryotes are smaller), the presence of a nucleus (not present in prokaryotes), and the presence of membrane-bound organelles (not present in prokaryotes). membranes ~ The structure is a pho...

ANSC 221 Exam 2 Questions and Answers Already Passed There are three transporter types: Uniporter, Symporter/co-transporter, and Antiporter. Oxidative process of metabolism involves _________. electron transport chain carbohydrate to protein Glycoprotein ________-cartilage (GAG example) chondroitin sulfate _____ adhere cells to each other and to the ECM cell junctions ____ coordinate cellular activites in multicellular animals. Hormones Equal water and solute concentrations...

Essential Membrane Functions correct answer: act as barrier regulate import and export of molecules compartmentalization of processes increases efficiency membrane properties correct answer: composed of lipid bilayer impermeable to polar molecules asymmetric membrane fluidity correct answer: lipids and proteins rotate or move within bilayer; allows cell movement, growth, division, secretion, cell junction formation, and self-heal if punctured comformational changes mediate fluid...

________________________________________ Explain why plasma membranes are said to have a fluid mosaic structure. - ANSWER1. Fluid because the phospholipids are constantly moving. 2. Mosaic because the proteins are scattered throughout the membrane-like tiles in a mosaic. What effect does cholesterol have on the cell membrane? - ANSWER1.Cholesterol molecules fit between the phospholipids and bind to the hydrophobic tails of the phospholipids. 2.Causes them to pack together more closely, restr...

AP Biology Unit 2 Test Questions with Verified Solutions _______ is a water channel in bacteria. Aquaporin 2 organelles that contain their own DNA separate from the chromosome Mitochondria and chloroplast A _______ is a chemical released by a cell in one part of the body, that sends out messages that affect cells in other parts of the organism. Hormone Both animals and plants have _________ that allow molecules to pass readily between adjacent cells without crossing plasma memb...

BSC1010 EXAM 2 QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS VERIFIED LATEST UPDATE 2024/2025 What is the Plasma Membrane made of? amphipathic phospholipids, other lipids, and proteins How does cholesterol help the PM cholesterol can help keep the membrane maintain the right fluidity peripheral protein bound to the surface of the membrane integral protein penetrate the hydrophobic core transmembrane proteins and seven-spanning and what type of protein integral protein six major func...

Phospholipid Made up of a glycerol backbone (3 carbons), hydro-carbon tail, and phosphate (negative) choline (positive) head group Have two hydrophobic hydrocarbon (oily) tails Hydrophilic phosphate head How the phospholipid layers form? The hydrophobic fatty acid tails and hydrophilic polar heads are part of the lipid bilayer. The tails repel water, so they are always facing the inside of the membrane. The polar heads love it, so they face the outside of the membrane. tails -> away from w...

ATI-TEAS Practice Tests Nov 2022. aka the windpipe - is a cylindrical portion of the respiratory tract that joins the larynx with the lungs connects the throat to the stomach - when someone swallows, this contracts to force the food down into the stomach - like other structures in the respiratory system, this structure secretes mucus for lubrication (1) Identify the tissue(s) that is/are striated (2) Identify the tissue(s) that is/are NOT striated a) cardiac b) smooth c) skel...

Three cell parts found in all cells? - Answer-DNA, plasma membrane, and cytoplasm or ribosomes What is the cell theory? - Answer-The cell is the basic unit of life, all living things are made up of one or more cells, and all cells come from the reproduction of other cells Cells that do not have a nucleus are: - Answer-prokaryotes DNA in bacterial/prokaryotic cells forms a: - Answer-circle DNA in eukaryotic cells are: - Answer-linear Why are cells small? - Answer-Cells do not get very large...