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Package Title: Test Bank Course Title: Derrickson 1e Chapter Number: 5 Question Type: Multiple Choice 1) Which word do physiologists use to describe the property of the membrane that means that some substances move through it easier than the others? a) selectively soluble b) selectively permeable c) concentration graded d) electrically graded Answer: b Difficulty: Medium Bloom’s: Comprehension Learning Objective 1: LO 5.1 Explain the concept of selective permeability. Section Reference: 5.1 Selective Permeability of the Plasma Membrane 2) Selective permeability of the biological membrane means that a) the membrane is made only of selected phospholipids b) all molecules are able to pass through the membrane c) no molecules can cross the membrane d) various molecules pass through the membrane with various “easiness” Answer: d Difficulty: Medium Bloom’s: Comprehension Learning Objective 1: LO 5.1 Explain the concept of selective permeability. Section Reference: 5.1 Selective Permeability of the Plasma Membrane 3) Cells that have reached equilibrium of all ion concentrations on both sides of the membrane are a) in perfect health b) dead c) excited d) polarized e) energized Answer: b

Difficulty: Hard Bloom’s: Analysis Learning Objective 1: LO 5.2 Distinguish between a concentration gradient and an electrical gradient. Section Reference: 5.2 Gradients across the Plasma Membrane 4) A concentration gradient can be described as a) a difference in a substance’s concentration in two different places in the cell b) a difference in a substance’s concentration on two sides of the membrane c) Both statements describe concentration gradient. d) None of the descriptions is correct. Answer: c Difficulty: Medium Bloom’s: Comprehension Learning Objective 1: LO 5.2 Distinguish between a concentration gradient and an electrical gradient. Section Reference: 5.2 Gradients across the Plasma Membrane 5) Which of these is an example of chemical gradient that exists in healthy living systems? a) concentrations of Na + inside the red blood cell and in the blood plasma b) concentrations of K + in blood and in cytoplasm of the muscle cell c) concentrations of Ca 2+ inside the sarcoplasmic reticulum and sarcoplasm of muscle cells between contractions d) All of the choices are examples of chemical gradient. Answer: d Difficulty: Medium Bloom’s: Application Learning Objective 1: LO 5.2 Distinguish between a concentration gradient and an electrical gradient. Section Reference: 5.2 Gradients across the Plasma Membrane Question type: True/False 6) Every cell in multicellular organism maintains concentration gradients of ions across the plasma membrane. Answer: True Difficulty: Medium

Bloom’s: Comprehension Learning Objective 1: LO 5.2 Distinguish between a concentration gradient and an electrical gradient. Section Reference: 5.2 Gradients across the Plasma Membrane 7) Only excitable cells, such as neurons and muscle, maintain the concentration gradient of Na + and K + ions across their membranes. Answer: False Difficulty: Medium Bloom’s: Application Learning Objective 1: LO 5.2 Distinguish between a concentration gradient and an electrical gradient. Section Reference: 5.2 Gradients across the Plasma Membrane Question type: Multiple Choice 8) Membrane transport is classified as active when it a) proceeds down the gradient b) is reversible c) requires input of energy d) reaches equilibrium Answer: c Difficulty: Easy Bloom’s: Knowledge Learning Objective 1: LO 5.3 Distinguish between passive processes and active processes. Section Reference: 5.3 Classification of Membrane Transport Processes as Passive or Active 9) A transport system that does not use any form of cellular energy is usually called a) passive b) active c) efficacious d) irreversible Answer: a Difficulty: Easy Bloom’s: Knowledge

Learning Objective 1: LO 5.3 Distinguish between passive processes and active processes. Section Reference: 5.3 Classification of Membrane Transport Processes as Passive or Active 10) What types of cellular energy do cells use to move substances through the membrane uphill of their gradients? a) thermal energy b) kinetic energy of matter c) chemical energy from ATP d) gravitational energy Answer: c Difficulty: Medium Bloom’s: Comprehension Learning Objective 1: LO 5.3 Distinguish between passive processes and active processes. Section Reference: 5.3 Classification of Membrane Transport Processes as Passive or Active 11) What is chemical nature of membrane components that enable cells to move substances that cannot cross by the process of simple diffusion in and out of the cell? a) phospholipids b) carbohydrates c) proteins d) glycolipids Answer: c Difficulty: Medium Bloom’s: Synthesis Learning Objective 1: LO 5.3 Distinguish between passive processes and active processes. Section Reference: 5.3 Classification of Membrane Transport Processes as Passive or Active 12) Which of the following transport proteins are integral membrane proteins? a) ion channel b) pump c) symporter d) antiporter e) All of the choices are correct.

Answer: e Difficulty: Medium Bloom’s: Comprehension Learning Objective 1: LO 5.3 Distinguish between passive processes and active processes. Section Reference: 5.3 Classification of Membrane Transport Processes as Passive or Active 13) Without using cellular energy, molecules can move into and out of cells by a) passing through channels b) binding to a carrier protein c) diffusing through the plasma membrane d) All of the choices are correct. Answer: d Difficulty: Medium Bloom’s: Comprehension Learning Objective 1: LO 5.3 Distinguish between passive processes and active processes. Section Reference: 5.3 Classification of Membrane Transport Processes as Passive or Active 14) Which type of membrane transport will still be possible when there is not enough oxygen available for producing adequate levels of ATP, such as during anaerobic exercise or in high altitudes ? a) flow of ions through channels b) transport of glucose by GLUT carriers c) pumping Na + and K + by the Na + /K + ATPase d) All of the choices are correct. e) both flow of ions through the channels and transport of glucose by GLUT carriers Answer: e Difficulty: Hard Bloom’s: Analysis Learning Objective 1: LO 5.3 Distinguish between passive processes and active processes. Section Reference: 5.3 Classification of Membrane Transport Processes as Passive or Active 15) Secondary active transport relies on the energy of

a) ATP hydrolysis b) electrochemical gradients c) magnetic pull between molecules d) gravity Answer: b Difficulty: Easy Bloom’s: Knowledge Learning Objective 1: LO 5.3 Distinguish between passive processes and active processes. Section Reference: 5.3 Classification of Membrane Transport Processes as Passive or Active 16) In passive transport modes such as simple or facilitated diffusion a) substances move from lower to higher concentration b) no cellular energy is used c) cells end up building the gradient of transported substance d) molecules tend to gather in one region of the cell Answer: b Difficulty: Medium Bloom’s: Comprehension Learning Objective 1: LO 5.4 Distinguish the different types of passive transport. Learning Objective 2: LO 5.4.1 Define diffusion. Section Reference: 5.4 Passive Transport 17) Substances moving through membranes in the process of diffusion a) move according to their innate kinetic energy b) move faster the smaller the concentration difference c) end up on the wrong side of the membrane d) move away from equilibrium concentration Answer: a Difficulty: Medium Bloom’s: Comprehension Learning Objective 1: LO 5.4 Distinguish the different types of passive transport. Learning Objective 2: LO 5.4.1 Define diffusion. Section Reference: 5.4 Passive Transport 18) Simple diffusion relies on the a) kinetic energy that all particles have

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