Lecture 2 Cells & Tissues Flashcards
What is a cell?
A single unit or compartment, enclosed by a border (plasma membrane); usually part of a larger structure
Role of the Nucleus?
Has DNA
Controls shape and activity through protein synthesis
Exports genetic information as RNA via the nucleolus
Whats the role of the Plasma membrane?
Limits the outside of the cell and interacts with the environment through secretion and absorption
What is the Passive Process?
Passive transport does not require energy
What is the Active process?
Active transport requires the use of energy (ATP)
Where do you find Smooth Muscle tissue?
No striations, one nucleus, walls of hollow organs) Stomach
Where do you find Cardiac Muscle tissue?
Composes the walls of the hearth, striated cells are generally uninucleate
Where do you find Skeletal Muscle tissue?
Aattached to the bones, long cylindrical striated cells, many nuclei)
What is Diffusion?
Movement of molecules from a region of higher concentration to a region of lower concentration
What is Facilitated Diffusion?
Membrane proteins (carriers) transport molecules across the cell membrane following a concentration gradient
What is Osmosis?
Movement of water through a semipermeable membrane
What does Ribosomes equal?
Site of protein synthesis
Where does the Endoderm tissue come from?
Epithelial linings of the digestive, respiratory, and urogenital systems
What is the Regeneration of Tissue repair?
Replacement of damage tissue with same functional tissue
What is the Fibrosis of Tissue repair?
Fibrous connective tissue replaces the functional tissue
