Revision Crossword

4. The type of muscle fibre found in marathon runners (4 and 6 Letters)
6. Type of cell that line the interior of blood vessels (11 letter)
7. Point in the action potential when sodium ion channels in the membrane open. This makes the membranes more permeable to sodium ions and the inside of the neuron starts to become positive (14 letters)
8. The point in an action potential where the inside of the cell becomes more negative than the resting potential due to potassium ion channels closing slowly (17 letters)
10. Gaps in the myelin sheath, the points slong the axon the nerve impulse travels down (3 words, 4, 3, and 7)
11. Type of one cell thick epithelial cells
12. Branched extensions of a nerve cell body that attaches to the axon terminals of another neuron (8 letters)

1. The change in electrical potential with the passage of an impulse along the membrane of a nerve cell (2 words,6 and 9 letters)
2. A fatty white that surrounds the axons of some nerve cells, forming an electrically insulating layer. It allows nerve impulses to travel fasted down the axon.(2 word, 6 and 6)
3. Contains digestive enzymes in the sperm cell. (7 letters)
5. The point in the action potential where the sodium channels close and the cell starts to become more negative again.(14 letters)
9. The shape of red blood cells. (9 letters)
11. A cell which produces myelin sheath around neurons (2 words 7 , 4 letters)