Brainpop: Cell specialization CELL SPECIALISATION N:\Science_Dimensions_2\elements\CompanionWebsite\zdata\schools\cw\au_sch_rickard_sd2_1\dnd\sd2_5ani.html Brainpop: Cell specialization http://www.brainpop.com/science/cellularlifeandgenetics/cellspecialization/preview.weml

Cell Specialisation What are some of the differences between a NERVE cell and a MUSCLE cell? Quiz tomorrow on organelles

How many different types of cells are there in the human body? 210 different types of cells in the human body

Neuron Receives and sends messages Part of the nervous system What would neurons have on their membranes? What organelle would neurons have a lot of? Neuron Firing http://www.youtube.com/watch?v=TKG0MtH5crc

Sperm and Egg Reproduction Sperm uses its ________ to swim to the egg. What organelle would a sperm cell have a lot of?

Muscle Cells Stretch and contract to make body movements Every movement in your body is the result of a muscle cells contracting and another set expanding.

Red Blood Cell Picks up oxygen from the lungs and delivers it around the body. unfortunately they also pick up carbon monoxide/cyanide

Write down what you see in each circle LEFT RIGHT The Ishihara Test Write down what you see in each circle Top Middle bottom

Results For Ishihara Test Red-Green Colour Blind Normal Colour Vision Red-Green Colour Blind Left Right Top 25 29 Spots Middle 45 56 Bottom 6 8

Cones What numbers did you see ? Cell in the back of your eye that detects COLOUR. If you lack some of these cone cells you may be colour blind! The most usual cause is a fault in the development of one or more sets of retinal cones that perceive color in light and transmit that information to the optic nerve.

Rods Cell in the back of your eye that detects light, but isn’t sensitive to color.

Thermosensitive Nerve Cells Primary function is to detect temperature Also detect pain Where are these cells located?

Skin Cells Provide protection and a barrier to the outside world The cells on the outside of your skin are dead

Absorptive Cells These cells absorb nutrients from food. Where do you think these cells are located?

These are all examples of differentiated cells. What is an example of an UNDIFFERENTIATED type of cell? An example of an undifferentiated cell in a mammal is a? A skin cell. B stem cell. C sperm cell. D nerve cell