1.1.3 Specialised Cells Flashcards
What do we mean by specialised cells?
Cells that are made to perform specific functions.
Tell me about the tail of a sperm cell.
Used for cell’s movement.
Allows sperm cells to travel towards egg cell.
Tell me about the head of a sperm cell.
Contains nucleus with one half of an organisms genetic material.
Combines with the egg cells one half of an organisms genetic material to fertilise it.
Tell me about the middle section of a sperm cell.
Filled with mitochondria to provide energy needed to swim.
Tell me about the Acrosome of a sperm cell.
Tip of the sperm cell that contains digestive enzyme needed to penertrate the egg cell.
Sperm cells are specialised to enable them to fertilise egg cells. To do this they need to travel long distances - relative to their size - to reach the egg, then to break through to the ____ cell membrane and fertilise it (combine the sperm DNA with the egg DNA).
egg
Sperm cells are specialised to enable them to fertilise egg cells. To do this they need to travel ____ distances - relative to their size - to reach the egg, then break through to the egg and ____ it (combine the sperm DNA with the egg DNA).
long
fertilise
What are haploid nuclei?
Nuclei that contain half the set of chromosomes.
Tell me about the cell membrane of an egg cell.
Adapted to change structure once fertilised so no more sperm cells get in.
Tell me about the cell membrane of an egg cell.
Full of nutrients needed for the zygote to grow.
The cell membrane is adapted to change structure once the egg is fertilised so that no more ____ can get into the egg cell.
sperm
Where are ciliated epithelial cells are found and what is it’s function?
Found in the linning of the airways
move mucus back to the throat to be swallowed.
Adaptations of ciliated epithelial cells
mitochondria
cilia (hair-like structure)
How many chromosomes are there in a haploid cell?
23
What is a common feature of sperm and ciliated epithelial cells.
many mitochondria
