Compartmentalization Study guides, Class notes & Summaries

Humans produce sweat as a cooling mechanism to maintain a stable internal temperature. Which of the following best explains how the properties of water contribute to this physiological process? - ANSWER The high heat of vaporization of water allows the body to remove excess heat through a phase change of water from liquid to gas A student placed a semipermeable membrane inside a U-shaped channel with two chambers, as shown. The membrane permits the movement of water but not salt. The...

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...

Functions of biological membranes correct answer: - barrier (import/export) -compartmentalization of essential molecules (incrs. efficiency) - cell signaling-mediated by pr & lipids (receptors) - modulate cell-cell recognition (glycoproteins & glycolipids) What's responsible for membrane formation correct answer: decrease in ionic interactions w/ h2o (HYDROPHOBIC EFFECT) -h20X tails aggregate to hide from h2o (lots of n-c interactions) -polar heads interact w/ h2o Decreases membrane ...

IB Biology 1.2 Latest Update Already Passed Resolution Resolution is defined as the shortest distance between two points that can be distinquished Explain why electron microscopes have a better resolution than light microscopes because the wavelength of the electrons is thousands of times smaller than the wavelength of light. Ultrastructure all the structures of a biological specimen that are at least 0.1 nm in their smallest dimension Something that electron microscopes can se...

Membranes (both outside and inside the cell) correct answer: Not a static structure, very important for cell function. They contain proteins that are very complex and vital to cell life. Mitochondria membranes correct answer: Very vital for the cell, has both an inner and outer membrane. What drives membrane formation? correct answer: A decrease in ionic interactions with water / limiting the hydrophobic interactions drives membrane formation. Lipid tails are ... correct answer: Hyd...

ARBORIST EXAM REVIEW QUESTIONS AND ANSWERS, GRADED A+ Meristems - -Sites of rapid cell division in the shoot tips and cambium Apical meristems - -Meristems located at the end of the shoots Apical dominance - -The tendency for terminal buds to inhibit the growth of lateral buds Leaves - -food factories Photosynthesis - -Combines carbon dioxide and water in a reaction driven by light to produce sugars. Oxygen is also a byproduct Chlorophyll - -The green pigment Transpiration - -the loss ...

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...

functions of the membrane correct answer: -the structure of the membrane is key for its function -act as a barrier regulating import and export of molecules -help with compartmentalization of the cell, creating particular environments for certain processes so multiple specialized processes could occur at once -modulates cell-cell recognition with their glycoproteins and glycolipids located on the outer leaflet facing the cytosol -signaling across the membrane by proteins and lipids p...

Humans produce sweat as a cooling mechanism to maintain a stable internal temperature. Which of the following best explains how the properties of water contribute to this physiological process? - ANSWER The high heat of vaporization of water allows the body to remove excess heat through a phase change of water from liquid to gas A student placed a semipermeable membrane inside a U-shaped channel with two chambers, as shown. The membrane permits the movement of water but not salt. The...

Discuss the differences between "flush cuts" and proper cuts made to outer portions of branch collar. How do "flush cuts" affect growth? - correct answer -A proper cut leaves the branch bark ridge, branch collar, and swollen collar in tact. It enables the cut to close in a circular fashion. Flush cuts remove it and opens the tree to decay by removing dead wood which branch defense zones form. Explain thinning cut and describe how they will affect the tree. - correct answer -It is remo...