please answer all 3 questions 17. Resting membrane potential Ta) must be reversed in order for nerve and muscle to function Tb) is established by differences in ion permeability leading to slight excess of positive charges on the-outside of the membrane compared to the inner membrane Tc) is a characteristic of all living cells Td)-All the above (a, b and c) are correct. T18. The cell organelle that fuses with a phagocytic vesicle in macrophages and which is responsible for killingof foreign organisms is the Ta) Golgi apparatus Tb) lysosomec. peroxisomeTd. mitochondrion T19. The cell organelle that packages material for secretion to the outside of the cell is the -1a) Golgi apparatusb) lysosomeTc. peroxisome Td. mitochondrion T

The cell is the basic structural and functional unit of cellular organisms. It is an aqueous…

Answered: 17. Resting membrane potential -T a)…

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter9: Cell Communication

Section: Chapter Questions

Problem 1ITD

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Which of the following statements is false? Proteins in the plasma membrane can: a. transport ions. b. transport chloride ions when there are two mutant copies of the cystic fibrosis transmembrane conductance regulator gene. c. recognize self versus foreign molecules. d. allow adhesion between the same tissue cells or cells of different tissues. e. combine with lipids or sugars to form complex macromolecules.
3. The protein integrin binds to actin filaments and, by binding to proteins like fibronectins, connects to collagen. In this manner, integrin ______. A.controls the permeability of the cytoplasmic membrane B. suspends organelles within the cytoplasm C. provides a direct linkage between the cytoskeleton and the extracellular matrix D. helps keep individual cells in place and connects adjacent cells to each other
1.There are different processes for transport of molecules of ions across cell membranes. Explain briefly each process a. Simples diffusion b. Facilitated diffusion via carrier proteins c. Facilitated diffusion via ion channels d. Primary active transport e. Secondary active transport f. Endocvtosis g. Exocytosis h. Transcytosis 2. List four Physical factors that affect the rate of diffusion and how they will affect it. 3. What kind of molecules can pass through the plasma membrane of the cells through simple diffusion? Give brief discussion. 4. List the three main parts of a cell and explain their functions. 5. Define an organelle. Which organelles are surrounded by a membrane and which are not? 6. What is the key difference between passive and active process? 7. Why RNA transcription can still serve the needs of the cell even if its operation is slow compared to DNA?
Which of the following regarding microtubules is LEAST correct? A)Microtubules do not have important functions in neurons B)Microtubules are important for anterograde axoplasmic transport C)No answer text provided. D)Microtubules are important for maintaining the structure of the neuron E)Microtubules are important for retrograde axoplasmic transport
1. Term describing the leukocyte's CAM-dependent migration from the blood vessel out to the tissue. 2. Name the two types of structures that mediate cell-cell contact and are associated with intermediate filaments. 3. The dynamic behavior of microtubules is regulated by a variety of MAPs. What does this stand for?
Dr Renko studied diffusion of tracer molecules to study paracellular diffusion across an epithelial monolayer of Caco-2 cells. The tracers were fluorescently labelled dextran molecules of different molecular weight. She is screening various drugs to determine whether they affect the cells in any way. Which drugs are most likely to change paracellular diffusion? a.) Drugs that modify microvilli are the most likely to change paracellular diffusion b.) Drugs that modify gap junctions are the most likely to change paracellular diffusion c.) Drugs that modify with aquaporins are the most likely to change paracellular diffusion d.) Drugs that modify tight junctions are the most likely to change paracellular diffusion
1. During a wound infection, the bacteria Clostridium perfringens produces collagenase, an enzyme that breaks apart collagen, as one of its virulence factors. What do you predict would be the most likely outcome of this collagenase production? A. Breakdown of connections and structure of the extracellular matrix B. Blockage of signal transduction C. Lysis of the phospholipid bilayer of cells D. Degradation of tight junctions 2 The primary cell wall of plants is made mostly of the structural carbohydrate ______, which is a polymer of the monosaccharide glucose. A. starch B.cellulose C.glycogen D.peptidoglycan 3. The protein integrin binds to actin filaments and, by binding to proteins like fibronectins, connects to collagen. In this manner, integrin ______. A.controls the permeability of the cytoplasmic membrane B. suspends organelles within the cytoplasm C. provides a direct linkage between the cytoskeleton and the extracellular matrix D. helps keep individual cells in place and…
2. When stained with methylene blue (buccal cell) and haemalum acid (onion cell), the nuclei were the only cellular structures that stained. This has to do with the stains being cationic (positively charged). What charge do you think the nuclei are in order to be stained? A) Positive (cationic) B) Negative (anionic) C) Neutral D) Hypotonic 3. FILL IN THE BLACKS USING THE BOLDED BRACKET OPTIONS: Observable physical differences between the three types of simple epithelial tissue are that squamous epithelial cells are _________ (flat, equal, more, less, cube, column, buccal, wider), whereas cuboidal epithelial cells have _____ (flat, equal, more, less, cube, column, buccal, wider) height and width and columnar epithelial cells have _______ (flat, equal, more, less, cube, column, buccal, wider) height than width. Please explain to help me understand! Thank you!
1. Imagine a hypothetical situation in which an animal cell such as a hepatocyte or a macrophage would completely lose the ability to produce membrane proteins. a) What would be the structural and molecular organization of such a hypothetical cell? b) How do you think this situation would affect the function of that cell? Be as thorough as you can.
10. The protein integrin binds to actin filaments and, by binding to proteins like fibronectins, connects to collagen. In this manner, integrin ______. (Choose all that apply) controls the permeability of the cytoplasmic membrane suspends organelles within the cytoplasm provides a direct linkage between the cytoskeleton and the extracellular matrix helps keep individual cells in place and connects adjacent cells to each other
7. Which of the following membrane transport proteins would you expect to be the most selective (although not the most rapid)? the bicarbonate ion channel the glucose carrier protein the potassium ion channel the chloride ion channel the sodium ion channel
1. Explain in detail how amino acids can be transported across the plasma membrane 2. By using the concept of endomembrane system, explain how plasma membrane involves in the protein synthesis of a cell. 3. With suitable examples, compare the structural and functional differences between a fibrous and globular protein. 4. A person suffers from a skin condition and loss of muscle. A doctor suspects the patient has protein deficiency. Justify why the doctor thinks so.

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