16 Questions
Which type of solution refers to a solution that has the same potential osmotic pressure as the cell?
Isotonic
What is the process that involves the movement of molecules from a region of lower concentration to a region of higher concentration against a gradient or an obstacle with the use of external energy?
Active Transport
What is the movement of water molecules from a solution with a high concentration of water molecules to a solution with a lower concentration of water molecules, through a cell's partially permeable membrane?
Osmosis
What is the process by which cells move materials from within the cell into the extracellular fluid?
Exocytosis
What is the function of the condenser in a microscope?
To focus the light into the specimen
What should be done after attaining a clear image with the lowest magnification objective lens?
Switch to the fine adjustment knob
What is the purpose of moving the coarse adjustment knob while looking through the eyepiece?
To bring the specimen to a general focus
What is the purpose of adjusting the diaphragm or condenser knob when using higher objective lenses?
To focus the phase of the image for a clearer view
What does the plasma membrane do?
Encloses cell contents, mediates exchanges with the extracellular environment, and plays a role in cellular communication.
What is the fluid mosaic model of membrane structure?
A constantly changing mosaic pattern formed by proteins floating in the fluid lipid bilayer.
What is the function of the glycocalyx?
Contains a carbohydrate rich area at the cell surface.
What is the function of gap junctions?
Facilitate communication and exchange of small molecules between adjacent cells.
What is the function of peroxisomes in the cell?
Detoxifying toxic substances using catalase and oxidase enzymes
What is the main function of centrioles in the cell?
Organizing a microtubule network during mitosis
What is the composition of intermediate filaments in the cell?
Protein fibers with varying compositions
What is the key characteristic that distinguishes microvilli from cilia?
Tubular extensions of the plasma membrane containing a bundle of actin filaments
Test your knowledge of cell biology with this quiz covering the cytoskeleton and organelles such as microfilaments, peroxisomes, and intermediate filaments. Explore the functions and roles of these cellular components in muscle contraction, intracellular movement, enzyme detoxification, and stabilization against mechanical forces.
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