Histology: Membrane Proteins and Cell Structures

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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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