Week 1 Cells And Tissues Flashcards
Explain the cell theory
All organisms are composed of cells Cells are the smallest living things Cells only arise from pre-existing cells
What is a cell?
A single unit or compartment in closed by a border usually part of the structure
What is cytology?
The study of cells
Describe characteristics of a prokaryote
Single celled Bacteria more complicated
Describe the characteristics of a Eukaryotes
Multi cellular organisms more complicated plant and animal cell much larger
Describe a Eukaryotic Cells nucleus
Genetic information Controls shape and activity (protein synthesis) Exports genetic info. RNA
Describe a Eukaryotic Cells cytoplasm
Surrounds the nucleus and carries out main function using specific organelles
Describe a Eukaryotic Cells plasma membrane
Limits the outside of the cell and interacts with the environment through secretion and absorption
Characteristics of double layered lipids
May float freely or be anchored Can have attached a molecule that play a role in surface activity
Explain how the nature of membrane affect how molecules move into cell
Lipid solubility molecules move easily Lipid insoluble molecules need help by active transport via the proteins
How do cells communicate with other cells
Via protein molecules
How do receptors communicate
With the cell to influence function or movement
What is the function of the nucleus
Stores the genetic material of the cell in form of multiple linear chromosomes
The nucleus is surrounded by
The nuclear envelope composed of two phospholipid bilayers
In chromosomes do you know is organised with proteins to form what
Chromatin
What is the nucleus
Dense body sight of RNA manufacture
What are the characteristics of endoplasmic reticulum
Rough covered in ribosomes the proteins synthesis channels move proteins to the targets smooth site of lipid and steroid hormone metabolism
What are the characteristics of a Golgi apparatus?
Stack of membrane snaps near necleus packages modifies proteins for delivery
What are the characteristics of a mitochondrial
Rod like double layered wall structures have their own dna and can divide independently return independent functions play a role in ageing
Explain the parts of a cytoskeletal
Microtubules microfilament’s intermediate filament
What are the characteristics of the microtubule
Cylindrical structures assembled from tubulin protein units Support and shape the soul move things around from centriole
What are the characteristics of the microfilament
Find filaments of them involved intracellular support and movement major feature of muscle
What are the characteristics of an intermediate filament
Stable cytoskeletal elements giving mechanical support to the cell
Explain the characteristics of tissues
During embryonic development of three layered are on the disc is formed Ectoderm- Nervous system as well as skin Endoderm- epithelial linings of the hugest ice, respiratory and urge oral systems. Mesomodern- Forms all other tissues
For things that make up the human body tissues are
Epithelia Muscle tissue Connective tissue nervous tissue
Explain the epithelia
Phone the surface it into faces of the body source of glands for secretary to reduce source of most cancers
Explain muscle tissues
Movement by contraction
Splane connective tissues
Support and communication of material
Explain nervous tissue
Specialised to carry electrical signals waves of membrane the polarisation Also supportive cells
