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Chapter 3 BIO 260 Questions and Answers 100% Solved $14.99   Add to cart

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Chapter 3 BIO 260 Questions and Answers 100% Solved

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  • BIOS 260
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  • BIOS 260

Chapter 3 BIO 260 Questions and Answers 100% Solved

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  • September 18, 2024
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  • Exam (elaborations)
  • Questions & answers
  • BIOS 260
  • BIOS 260
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Chapter 3 BIO 260 Questions and Answers 100% Solved


ions that use specific protein channels in the membrane use a process called____________ to

move down their concentration gradient across the plasma membrane Correct Ans-

facilitated diffusion




__________ is the name the transport mechanism in which water molecules move through a

selectively permeable membrane toward the solution with more impermeant (one that

cannot cross the membrane) Correct Ans-osmosis




the passive transport mechanism in which small solutes are forced through a membrane by

hydrostatic pressure is known as Correct Ans-filtration




true or false: active transport processes require cellular energy (ATP) while passive transport

don't require cellular energy (ATP) Correct Ans-true; the source of energy in active

transport processes is cellular energy while in most passive processes the sources of energy is

molecular motion




active transport is a process that moves particles through a membrane from a region of

_________ concentration to a region of _______ concentration Correct Ans-low; higher

, Chapter 3 BIO 260 Questions and Answers 100% Solved



the source of energy for __________ transport mechanisms is cellular energy Correct Ans-

active




endocytosis takes particles ________ the cell bh using _________ Correct Ans-into;

vesicles




phagocytosis is the process by which cells engulf ________ from extracellular fluid Correct

Ans-solid particles




exocytosis uses _______ to move substances _________ the cell Correct Ans-vesicles; out

of




the three main stages of the cell cycle are interphase, mitosis, and _________ Correct Ans-

cytokinesis




place the stages of mitosis in the correct order with the beginning of the process at the top

Correct Ans-prophase

, Chapter 3 BIO 260 Questions and Answers 100% Solved


metaphase




anaphase




telophase




true or false: interphase is the resting stage and therefore no cellular activity takes place

Correct Ans-false; a lot of cellular activity is taking place during interphase




what type of cells retains the ability to divide repeatedly into any type of cell, thus allowing

the body to repair and grow Correct Ans-stem cell




some types of active transport use energy provided by ATP molecules Correct Ans-true




endoplasmic reticulum is best described as a Correct Ans-network of interconnected

membranes

, Chapter 3 BIO 260 Questions and Answers 100% Solved


what term describes the series of events that a cell undergoes from the time it forms until the

time it divides Correct Ans-the cell cycle




what is the definition of apoptosis Correct Ans-programmed cell death




a cell surrounded by an extremely thin, flexible membrane. why is the membrane selectively

permeable Correct Ans-it allows some substances to pass through and excludes others

based on size, polarity and other factors




cell division consists of mitosis and cell differentiation Correct Ans-false




red blood cells are placed in a solution of 0.9% NaCl and no diffusion or osmosis is observed.

this means that the solution is Correct Ans-isotonic




some people cannot be infected with HIV because Correct Ans-their cells lack receptors

that admit the virus

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