Specialised cells Flashcards
1
Q
Why does red blood cells not have a nucleus
A
So they can hold more oxygen
2
Q
Why is a red blood cell biconcave
A
To absorb oxygen more quickly
3
Q
How can sperm cells swim fast
A
Because of its tail and its streamlined shape
4
Q
What are muscle cells full of
A
Long protein filaments
5
Q
The muscle cells appearance
A
Long and thin but can contract to short and fat
6
Q
What do nerve cells do
A
Transmits electrical signals to the nervous system
7
Q
Why are nerve cells thin
A
They can carry messages up and down the body over large distances very quickly
8
Q
How can nerve cells send messages across the body
A
They have branched connections at each end. These join to other nerve cells
9
Q
What do skin cells do
A
Prevent microbes from entering the body
