Name Period Chapter 7: Membrane Structure and Function Concept 7.1 Cellular membranes are fluid mosaics of lipids and proteins 1. The large molecules of all living things fall into just four main classes. Name them. Explain what is meant when we say a molecule is amphipathic. 3. In the 1960s‚ the Davson-Danielli model of membrane structure was widely accepted. Describe this model and then cite two lines of evidence that were inconsistent with it. 4
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physioex 9.0 Review Sheet Exercise 4 Endocrine System Physiology Name Laura Bauer Lab Time/Date Thursday 5:30-7:30 Activity 1 Metabolism and Thyroid Hormone Part 1 1 Which rat had the fastest basal metabolic rate (BMR)? The Normal rat had the fastest BMR. 2 Why did the metabolic rates differ between the normal rat and the surgically altered rats? How well did the results compare with your prediction? ___ The BMRs differed because the surgically altered rats were missing
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Final Exam Review Packet Name: _Susan Clark Chapter 1: 1. | An investigator who conducts an experiment to determine how temperature changes affect the rate at which the heart beats is most likely a(an) A. | anatomist. | B. | physiologist. | C. | chemist. | D. | biochemist. | E. | physicist. | | 2. | The branch of science that deals with the structure of human body parts is called anatomy. | 3. | The branch of science that deals with the functions of human
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(hypertonic). If the concentration of certain molecules is higher inside of the cell‚ then the water will move into the cell causing it to swell (hypotonic). When the molecule concentrations are equal on both sides of the membrane‚ water does not move (isotonic). In the human body‚ many salts and enzymes help to regulate a cell’s state and the processes necessary for the human body to function such as potassium and calcium channels in the heart. These functions are carried out by having constant changes
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Potatoes The initial weights of the potato cubes ranged from 0.93-1.04 grams from the solutions containing AgNO3 (Table 1). Graph one depicts the correlation of percent change in weight for each sucrose concentration with AgNO3 added. The initial length of the potato cylinders were 2cm as depicted in table two. Graph two depicts the correlation of percent change in length in different sucrose concentrations. The initial weights for the solutions lacking AgNO3 ranged from 1.0-1.7grams (Table 3)
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There are three types of osmosis: hypertonic is when there is high concentration and the cell has no water inside it (shrunk)‚ hypotonic is when there is low concentration and the cell has swelled up or in other words has a lot of water inside it‚ isotonic is when the water comes in and out of the cell and stays the same shape. All the carrots we put in the salt solution was from the same carrot‚ the 0% carrots mass was 6.8grams‚ the 5% salt solution is 14.6 grams‚ the 10% salt solution is 6.3grams
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Passive Transport (Section 5-1) Answer Sheet VOCABULARY REVIEW Explain the relationship between the terms in each of the following pairs of terms. 1. concentration gradient‚ diffusion: A difference in the concentration of molecules in two areas‚ called a concentration gradient‚ can result in diffusion‚ the movement of molecules from the area of higher concentration to the area of lower concentration. 2. osmosis‚ turgor pressure: Osmosis is the diffusion of water molecules across a cell membrane
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Bio 30 Cell Questions Question Sheet McDougal Littell Biology Textbook – Page 70 3.1 Cell Theory 1. Explain the three major principles of cell theory in your own words. 2. What characteristics are shared by most cells? 3. How did improvements in the microscope help scientists form the cell theory? 4. How do prokaryotic and eukaryotic cells differ? 5. Today‚ scientists can study human cell grown in petri dishes. Explain how this technique builds on the work of early
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Name: Jojo Cohen Date: 12-8-17 Cell Transportation Overview Directions: Read page 362-374 and use your notes to help you answer the following questions. 1. Illustrate and describe the structure of the cell membrane using figure 2.8 on page 362. 2. What does selectively permeable mean (pg. 363)? A: Selectively permeable means that some substances can pass through the cell membrane while others cannot pass through. 3. What is diffusion and why does it occur? A: The movement of solutes
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Osmosis is the diffusion of water across the cell membrane. Three examples of osmosis are hypertonic‚ hypotonic‚ and isotonic solutions. A hypertonic solution is a solution that has a higher concentration of dissolved particles than another solution. A hypotonic solution is a solution that has lower concentration of dissolved particles compare to another solution. Lastly an isotonic solution is a solution that has an equal concentration of dissolved particles compared to another solution. The last
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