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13 Cards in this Set

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Scanning electron microscope (SEM)

A microscope that uses an electron beam to scan the surface of spicemen(3D images)

Transmission electron microscope (TEM)

A microscope that passes an electron beam through very thin sections and is primarily used to study the internal ultrastructure of cells.

Nuclear lamina

It helps maintain the shape of the nucleus.(inside the nucleus)

Structures of the Endomembrane System

Nuclear Envelope,

Plasma Membrane,

Endoplasmic Reticulum,

Golgi Apparatus,



Function of every organelle in Eukaryotic cell

Mitochondria: Make energy out of food

Ribosomes: Make protein

Golgi Apparatus: Make, process and package proteins

Lysosome: Contains digestive enzymes to help break food down

Rough ER: assembled protein(protein are exported out of the cell)

Smooth ER: assembled lipids

Vacuole: Used for storage, vacuoles usually contain water or food.

Centrioles: Animal Cell(organize chromosome in cell division)

Mitochondria and Chloroplasts

Contain their own DNA and ribosomes

Gap Junction(ANIMAL CELLS)

A type of intercellular junction in animals that allows the passage of materials between cells.

Tight junction

A type of intercellular junction in animal cells that prevents the leakage of material between cells.


A type of intercellular junction in animal cells that functions as a rivet.

3 Types of cytoskeleton fibers

A network of microtubules, microfilaments, and intermediate filaments that branch throughout the cytoplasm


Microfilaments are fine, thread-like protein fibers, 3-6 nm in diameter. They are composed by a protein called actin. Microfilaments' association with the protein myosin is responsible for muscle contraction.


Microtubules are cylindrical tubes, 20-25 nm in diameter. They are composed of the protein tubulin. Microtubules determine cell shape, also form the spindle fibers for separating chromosomes during mitosis. When arranged in geometric patterns inside flagella and cilia, they are used for locomotion.

Intermediate Filaments

Intermediate filaments are about 10 nm diameter and provide tensile strength for the cell.