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Which of the following is not a method by which particles can leave a cell?


A) Active transport
B) Exocytosis
C) Simple diffusion
D) An antiport system
E) Pinocytosis

F) B) and D)
G) A) and E)

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Which of the following is not a membranous organelle?


A) Mitochondria
B) Ribosome
C) Nucleus
D) Endoplasmic reticulum
E) Golgi complex

F) B) and C)
G) C) and D)

Correct Answer

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_________ decompose fatty acids,and detoxify alcohol,free radicals,and drugs.


A) Lysosomes
B) Microvilli
C) Inclusions
D) Peroxisomes
E) Golgi vesicles

F) A) and E)
G) B) and E)

Correct Answer

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Which of the following processes could occur only through a cellular membrane?


A) Facilitated diffusion
B) Simple diffusion
C) Filtration
D) Osmosis
E) Active transport

F) C) and D)
G) A) and B)

Correct Answer

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__________ play an important role in cell division,and they are made of __________.


A) Mitochondria;microtubules
B) Ribosomes;intermediate filaments
C) Nucleoli;microfilaments
D) Centrioles;microtubules
E) Inclusions;centrosomes

F) A) and B)
G) A) and E)

Correct Answer

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Which of the following is a double-membraned organelle consisting of a matrix and cristae?


A) Mitochondrion
B) Rough ER
C) Smooth ER
D) Golgi complex
E) Nucleolus

F) A) and B)
G) A) and C)

Correct Answer

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Muscle cells contain numerous __________ to serve their high demand for ATP.


A) ribosomes
B) lysosomes
C) mitochondria
D) inclusions
E) Golgi vesicles

F) A) and E)
G) B) and C)

Correct Answer

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Which of these is an example of active transport?


A) Diffusion of oxygen from a place of high concentration to a place of lower concentration
B) Facilitated diffusion of K+
C) Transport of glucose down its concentration gradient
D) Transport of Na+ from a place of low concentration to a place of higher concentration
E) Transport of Cl- following its concentration gradient

F) B) and D)
G) A) and B)

Correct Answer

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Channel protein gates respond to all these stimuli except __________.


A) chemical messengers
B) ligands
C) changes in electrical potential (voltage) across a cellular membrane
D) physical deformation of a cellular membrane
E) water in the extracellular fluid

F) D) and E)
G) B) and C)

Correct Answer

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Which of the following is not a function of the Na+-K+ pump?


A) Heat production
B) Transport of Na+ into the cell and K+ out of the cell
C) Secondary active transport
D) Regulation of cell volume
E) Maintenance of membrane potential

F) B) and C)
G) A) and E)

Correct Answer

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Microvilli and cilia differ in their function,but have the same internal structure.

A) True
B) False

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