18 Questions
What is a common characteristic of nuclei in malignant tumors?
Enlarged and abnormally shaped
What do cancer cells do to the genes controlling the apoptotic process?
Deactivate them
How does increasing magnification affect the field of view?
It decreases
Which part of the lens system is responsible for initial magnification?
Scanning power objective
What does the coarse adjustment knob on a microscope primarily help with?
Initial focusing
What component controls the distance between the slide and the objective in a microscope?
Aperture Diaphragm
Which organelle is responsible for manufacturing all proteins secreted from cells?
Rough Endoplasmic Reticulum
Which organelle is continuous with the rough endoplasmic reticulum and consists of tubules arranged in a network?
Smooth Endoplasmic Reticulum
Which organelle is associated with tiny membranous vesicles and is shaped like hollow dinner plates?
Golgi Apparatus
What are the spherical membranous sacs containing activated digestive enzymes?
Lysosomes
Which network consists of rods running through the cytosol and accessory proteins that link these rods to other cell structures?
Cytoskeleton
Which type of protein fibers are tough, insoluble, and composed of tetramer fibrils?
Intermediate filaments
What type of proteins are tightly associated with the cell membrane?
Integral proteins
Which type of junction prevents molecules from passing through the extracellular space between adjacent cells?
Tight junctions
What is the function of desmosomes in cell structure?
To prevent separation of adjacent cells
Which process involves the movement of molecules from an area of higher concentration to an area of lower concentration?
Simple diffusion
What are connexons responsible for in cell communication?
Connecting cells at gap junctions
Which type of junction is responsible for communicating between adjacent cells?
Gap junctions
Explore the different types of membrane proteins such as integral and peripheral proteins, lipid rafts, glycocalyx, and cell junctions like tight junctions. Learn about their structures and functions in cell biology.
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