Flashcards in Cells Deck (55)
What is the function of the Golgi apparatus?
What is the function of the mitochondria?
Release energy/ATP by aerobic respiration
What is the function of the ribosomes?
What is the function of the chloroplast?
Name 2 structures found in the nucleus
Chromosomes and nucleolus/nucleoli
What is the function of the cell membrane?
Controls which substances enter and leave the cell
What is the function of the Golgi vesicles?
Transports chemicals across the Golgi apparatus or to the cell membrane.
What is the function of the lysosome?
Hydrolyses dead or damaged organelles.
What is the function of the rough endoplasmic reticulum?
Makes and transports proteins
What is the function of the smooth endoplasmic reticulum?
Makes and transports steroids
What is the function of the cell wall?
Rigid outer covering to the plant cell. Supports the plant cell.
What is the function of the vacuole?
Stores cell sap. Keeps the cell turgid.
The epithelium cells of the small intestine have microvilli on them. What is their function?
Increase surface area for absorption of digested food.
What is a tissue?
A group of similar specialised cells that perform a particular function.
What is an organ?
A group of tissues which perform a particular function
What is a system?
A group of organs which perform a particular function
Which are larger? Prokaryotic cells or eukaryotic cells?
Give three ways in which prokaryotic cells are different to eukaryotic cells
No membrane-bound organelles eg mitochondria
Cell wall made of glycoprotein not cellulose
Give 3 features that are found in prokaryotic cells and not eukaryotic cells
One or more plasmids
A capsule surrounding the cell
One or more flagella
Give three features found in viruses
Viruses are acellular. What does this mean?
Not made of cells
Give 2 advantages of using a light microscope rather than an electron microscope
Can see living cells
Cell movement can be observed
Very few artefacts
Can see natural colour
Give two advantages of using an electron microscope rather than a light microscope
Why does an electron microscope give better resolution than a light microscope?
Uses a shorter wavelength of the electromagnetic spectrum
Give an advantage of a scanning electron microscope over a transmission electron microscope
3D images vs 2D images
Observe the surface of a structure
Give an advantage of a transmission electron microscope over a scanning electron microscope
Observe internal structures in the cell
Why are cells dead when viewed under an electron microscope?
High energy electrons damage cells
What does magnification mean?
How large the image is compared to real life
What does resolution mean?
The smallest distance below which two discrete objects will be seen as one.