Concentration gradient Study guides, Class notes & Summaries
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Bio 1201 gregg Exam 2 (100% correct and graded A+)
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transport proteins - are responsible for controlling passage across the membrane 
fluid mosaic model - The membrane is a mosaic of protein molecules bobbing in a fluid bilayer of 
phospholipids 
fatty acid tails - nonpolar, hydrophobic 
fatty acid heads - hydrophilic, polar 
periphial proteins - bound to the surface of the membrane 
integral proteins - penetrate the hydrophobic core (ones that span the membrane are 
transmembrane protiens 
How do cells recognize each other? - by binding to molec...
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Testbank for Biology 2nd Edition from OpenStax College
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Testbank for Biology 2nd Edition from OpenStax CollegeChapter 1 1 Figure 1.6 1: C; 2: F; 3: A; 4: B; 5: D; 6: E. The original hypothesis is incorrect, as the coffeemaker works when plugged into the outlet. Alternative hypotheses include that the toaster might be broken or that the toaster wasn't turned on. 3 Figure 1.16 Communities exist within populations which exist within ecosystems. 4 B 6 D 8 C 10 C 12 B 14 D 16 Answers will vary, but should apply the steps of the scientific method. One poss...
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Rutgers Murphy Biochem Exam 2 Fully Solved Solution
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Membrane remodeling 
Requires phospholipases 
Requires acyl transferases 
Occurs only when cells are under stress 
Correct! Both A and B are correct 
All of the above are correct 
Both A and B are correct 
In simple diffusion a solute 
Is propelled by random molecular motion 
Moves up its concentration gradient 
Moves across a membrane because of an input of free energy. 
Both A and B are correct 
All of the above are correct 
Is propelled by random molecular motion
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GMS 6440 Fundamentals of medical physiology final exam with correct answers |100% verified|
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Does water need a pore/channel to cross the capillary wall? ANS: - No, movement is 
passive 
during what do the sympathetic and parasympathetic nervous systems work together ANS: - male sexual function 
parasympathetic nervous system: erection 
sympathetic nervous system: ejaculation 
electrical chemical gradient ANS: - when K+ leaks out of cell, leaves behind - charged anion 
cell inside is more negative 
creates electrical gradient to pull K+ back inside cell 
example of measuring an unknown v...
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ECPI Final Exam Bio 112 questions with correct answers
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Osmosis is the movement of Answer water through a selectively permeable membrane down its concentration gradient 
 
The ability of an organism to sense and react to changes in its body illustrates Answer responsiveness 
 
In negative feedback mechanisms, changes away from the normal state Answer stimulate changes in the opposite direction to restore normal levels 
 
Which of the following are living organisms simplest unit? Answer cells 
 
An organic compound always contains Answer carbon and hy...
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PNB 2264 exam 1 Questions With 100% Correct Answers.
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A cell is taken out of the body and placed into a test solution. The concentration of solute X in the test 
solution is 100mM, and the concentration of solute X inside the cell is 200mM. The cell membrane is 
permeable to water but not solute X. Which of the following statements is/are true? 
a. There is a net flux of water out of the cell 
b. The test solution is hypertonic 
c. There is flux of water molecules into and out of the cell 
d. All of the above are true - c. There is flux of water mo...
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Rush Advanced Pharmacology NSG 531 Exam 1 Questions and Correct Answers
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Rush Advanced Pharmacology NSG 531 Exam 1 Questions and Correct Answers 
Drug - Answer-a substance intended for use in the diagnosis, cure, mitigation, treatment, or prevention of disease and a substance, other than food, intended to affect the structure or any function of the body 
 
T/F most drugs are strong acids or strong bases - Answer-F - most drugs are weak acids or weak bases 
 
what are the four things that the body does to a drug? - Answer-1. absorbs it 
2. distributes it (think about...
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Hemo Dialysis Bonnet Exam With 100% Correct Answers 2023
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Hemo Dialysis Bonnet Exam With 100% Correct Answers 2023 
Osmosis 
movement of fluid across a semipermeable membrane from an area of lower concentration to higher concentration 
 
 
 
Diffusion 
movement of dissolved particles across a semipermeable membrane from an area of higher concentration to lower concentration 
 
 
 
Ultrafiltration 
water is removed from blood because there is pressure gradient across the membrane 
 
 
 
Ultrafiltration Rate 
The rate at which fluid moves from blood into...
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Edexcel a level biology paper 1 mark scheme june 2023
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Mark Scheme (Results) 
Summer 2023 
Pearson Edexcel GCE 
In Biology B (9BI0) 
Paper 01: Advanced Biochemistry, 
Microbiology, and Genetics 
Edexcel and BTEC Qualifications 
Edexcel and BTEC qualifications are awarded by Pearson, the UK’s largest awarding body. We 
provide a wide range of qualifications including academic, vocational, occupational and 
specific programmes for employers. For further information visit our qualifications websites 
at or . Alternatively, you can get in touch with ...
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LSU Bio 1201 exam 2 Questions With 100% Correct Answers.
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why are membranes called phospholipid bilayers? - Answer-phospholipids have hydrophilic head and 
hydrophobic tail, hydrophobic face inside of cell making 2 layers 
what is meant by fluid mosaic? - Answer-Mosaic of proteins drifting laterally in fluid bilayer of 
phospholipids 
how are membranes adjusted for different temperatures? - Answer-membrane fluidity adjusted by 
changing the ratio of unsaturated to saturated fatty acids 
how do the relative amounts of saturated and unsaturated fats chan...
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PATHO- NURS 8022 EXAM 1 QUESTIONS & ANSWERS (2023/2024)(VERIFIED ANSWERS)
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PATHO- NURS 8022 EXAM 1 QUESTIONS & ANSWERS (2023/2024)(VERIFIED ANSWERS)EXAM 1 PATHO- NURS 8022 QUESTIONS & ANSWERS 
(2023/2024)(VERIFIED ANSWERS) 
Negative Feedback 
 - ANSWER Promotes stability; cancels out the original response. Ex: High FSBS, increased insulin by the 
pancreas 
Positive Feedback 
 - ANSWER Promotes a change in one direction; instability, DISEASE. Ex: Blood clotting, platelet cascade 
Proteins 
 - ANSWER Provide selectivity to a membrane 
Integral proteins 
 - ANSWER channel...
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