B1.4 Specialisation in animal cells Flashcards
How are nerve cells specialised?
To carry electrical impulses around the body of an animal - provide a rapid communication system between the different parts of the body
What are the purpose of dendrites?
Make connections to other nerve cells
What is the purpose of axons?
Carries the electrical impulses from one place to another
How are nerve endings specialised?
By having synapses that contain a lot of mitochondria
How are muscle cells specialised?
To contract and relax
How do the fibres contract?
Contain special protein that slide over each other
Why do the muscle cells contain lots of mitochondria?
To transfer the energy needed for the chemical reactions that take place as the cells contract and relax
Why do muscle cells store glycogen?
A chemical that can be broken down and used in cellular respiration by the mitochondria to transfer the energy needed for the fibres to contract
How are sperm cells specialised?
To fertilise an egg
What is the purpose of the long tail of the sperm?
Help move through the female reproductive system
What is the purpose of the acrosome near the nucleus?
Stores digestive enzymes for breaking down the outer layers of the egg
Describe the function of muscle cells in the wall of the stomach.
To contract/ shorten
To move the food along the stomach
What is the use of mitochondria?
To transfer energy for use by respiration
In what form is information passed across the junction(Synapse)?
Via chemical / neurotransmitter
Describe how the ribosomes and Mitochondria help the cell to make enzymes?
Ribosomes makes proteins via protein synthesis
By using amino acids
Mitochondria provides energy for the respiration
