Specialised Cell And Magnification Flashcards
(11 cards)
What are specialised cells
Cells that specialise by differentiating into different kinds of cells
Types of specialised cells
Erythrocytes (red blood cells)
Nerve cells (neurones)
Sperm cells
Ova cells
Strained muscles
Squamous epithelial cells
Properties of Erythrocytes
Carries oxygen around the body using haemoglobin
It is shaped in form of a biconcave disks
It has no nucleus
It contains plasma membrane proteins and other proteins
It has elastic membrane which allows it to change shape and squeeze through narrow capillaries
Properties of nerve cells
It carries nerve impulses around the body
It has two types of neurons
Sensory neurons carries impulses towards the CNS
Motor neurons carries impulses away from the CNS
Structure: cell body, axon and dendrites
Properties of sperm cell
It fertilises the female egg cells
The head contains genetic information and an enzyme to help penetration
The middle is packed with mitochondria
The tail helps in movement
Properties of egg cell
Carries the mother’s DNA
Properties of Strained muscle cells
It makes up the skeletal muscles
Contracts to move the bones and enable movement of the body
Contains mitochondria to provide energy muscles contractions
Properties of squamous epithelium cells
Flattened cells which reduces the distance that substances must pass through
Shortens the diffusion pathway
Present in exchange surfaces such as air sacs in the lungs, kidney, gut and walls of blood vessels
Properties of ciliated epithelial cells
Lines the respiratory tract from the nose to the bronchioles
It sweeps away mucus trapped dust and bacteria up to the back of the throat
Contains tiny hairs called cilia
Microscope
It is an apparatus used to see cells or tiny microscopic organisms
Light microscopy
It has a lower magnification and resolution than other microscopes
It magnifies cellular organisms such as cell nucleus and mitochondria
