Electrochemical gradient Samenvattingen, Aantekeningen en Examens

Compartmentalization correct answers The segregation of functions into different compartments; in the cell, increases the efficiency of chemical reactions Lipid correct answers Any organic molecule that is poorly soluble or virtually insoluble in water but is soluble in nonpolar organic solvents; make up the membranes of cells Membrane correct answers Made of either phospholipids or phospholipids and sterols; often bilayers with polar head group facing outside from hydrophobic tails Per...

cell membrane phospholipids outer vs inner leaflets Outer Leaflet: C-E-Sphi PhospatidylCholine, PhosphatidylEthanolamine, Sphingomyelin Inner Leaflet: S-I PhosphatidylSerine, PhosphatidylInositol cell membrane major lipoprotein source of cholesterol LDL INTERCELLULLAR STRUCTURES Disk-shaped; For tight intercellular adhesion found in?? Macula Adherens (Desmosomes) think STAPLER wires! epithelium INTERCELLULLAR STRUCTURES • Ring-shaped • increases surface a...

Glucose is absorbed from the lumen of the small intestine into epithelial cells. Explain how the transport of sodium ions is involved in the absorption of glucose by epithelial cells. (5 marks) [Unit 1, June 16] : 1. Na+ ions leave epithelial cell and enter blood; 2. (Transport out is by) active transport / pump / via carrier protein using ATP; 3. So, Na+ conc. in cell is lower than in lumen (of gut); 4. Sodium/Na+ ions enter by FACILITATED diffusion; 5. Glucose absorbed with Na+ ions a...

AQA A-Level Biology Questions with Answers | Graded A Glucose is absorbed from the lumen of the small intestine into epithelial cells. Explain how the transport of sodium ions is involved in the absorption of glucose by epithelial cells. (5 marks) [Unit 1, June 16] - Correct Answer ️️ -1. Na+ ions leave epithelial cell and enter blood; 2. (Transport out is by) active transport / pump / via carrier protein using ATP; 3. So, Na+ conc. in cell is lower than in lumen (of gut); 4. Sodium/N...

Module 2- Microbiology Portage Learning Questions and Answers 100% Pass cellular metabolism a controlled set of biochemical reactions that occur in living organisms to maintain life Enzymes a protein, or group of proteins, that speed up (catalyze) chemical reactions Cofactors a small chemical component, usually metal ions, that assist and regulate enzymes during the catalysis reactions. enzymes break down proteins into what: amino acids enzymes break down lipids into what: glycerrol/fatty ac...

The absolute refractory period occurs because _______ channels cannot be opened, and the relative refractory period occurs because _______. - voltage-gated Na+; voltage-gated K+ channels remain open Dendritic spines serve to - increase the surface area of the dendrite Many ion channels are not normally open but must be gated or opened by some event. Which of the following is NOT an example of an event that typically results in opening/closing an ion channel? - Enzymatic reactions Neural...

A&P Exam 4 Homework1. Graded potentials are produced within the _____ segment of a neuron. - correct answer Receptive Graded potentials result from the opening of _____ - correct answer Ligand-gated channels An inhibitory postsynaptic potential results from the opening of _____ - correct answer Potassium and/or chloride channels Indicate the summative effect that brings the initial segment closest to threshold - correct answer Two EPSPs in proximity to each other When voltage-gated s...

AQA A-Level Biology Questions with Answers | Graded A Glucose is absorbed from the lumen of the small intestine into epithelial cells. Explain how the transport of sodium ions is involved in the absorption of glucose by epithelial cells. (5 marks) [Unit 1, June 16] - Correct Answer ️️ -1. Na+ ions leave epithelial cell and enter blood; 2. (Transport out is by) active transport / pump / via carrier protein using ATP; 3. So, Na+ conc. in cell is lower than in lumen (of gut); 4. Sodium/N...

Emergent properties - correct answer new properties that emerge with each step upward in the hierarchy of life, owing to the arrangement and interactions of parts as complexity increases Negative feedback - correct answer a mechanism of response in which a stimulus initiates reactions that reduce the stimulus Positive feedback - correct answer a physiological control mechanism in which a change in a variable triggers mechanisms that amplify the change Inductive reasoning - correct answe...

Which of the following statements is true for phospholipids and sphingolipids? - Both have an amphiphatic organization Why is cholesterol able to integrate into a lipid bilayer? - Because it prevents the dense packing of phospholipids Which of the following statement best describes how bacteria in a hot spring control the fluidity of their plasma membrane? - They increase the percentage of lipids with unsaturated hydrocarbon chains in their plasma membrane. Which activity can only be do...