Animal cells

Question 1

Adaptations of sperm cells

Answer 1

A tail to swim faster, lots of mitochondria to release energy for swimming, acrosome to digest cell membrane of egg cell

Question 2

Adaptations of nerve cells

Answer 2

Long fibre (axon) to carry messages up and down the body over long distances, fatty sheath to insulate and speed up nerve impulses, branches to hook onto other nerve cells

Question 3

Adaptations of muscle cells

Answer 3

Lots of mitochondria to release energy for contraction, protein fibres that can contract when energy is available

Question 4

Adaptations of red blood cells

Answer 4

No nucleus so more room for haemoglobin, flexible disk shape to go through narrow areas

Question 5

Adaptations of ciliated cells

Answer 5

Contains tiny hairs to remove mucus and trap pathogens

Question 6

Stem cell

Answer 6

A cell in the body that has not yet been specialised for a purpose. Found in embryos and parts of the adult body such as bone marrow.

Question 7

Differentiation in animal cells

Answer 7

Once differentiated can’t differentiate again into a different cell, embryo stem cells can become any specialised cell adult stem cells are limited