Neural communication systems

Question 1

What are some pros and cons of the endocrine system?

Answer 1

• requires production of a hormone so can be quite slow
• widespread communication

Question 2

What are some pros and cons of the neural communication system?

Answer 2

• incredibly fast
• can only reach places with specific nerves

Question 3

What are some pros and cons of the neuro-endocrine system?

Answer 3

• faster than endocrine

Question 4

What is included in the central nervous system?

Answer 4

brain and spinal cord

Question 5

What are the afferent nerves?

Answer 5

the nerves collecting information and taking it into the CNS

Question 6

What is the consequence of more interneurones being required?

Answer 6

slower

Question 7

What is the distribution of sodium and potassium inside and outside a cell?

Answer 7

• sodium is higher outside the cell than inside
• potassium is higher inside the cell than outside

Question 8

Where is the cell is the potential difference the strongest?

Answer 8

along the cell membrane

Question 9

What is the cell’s permeability to sodium,potassium and chloride?

Answer 9

• low permeability to sodium
• relative permeability to potassium
• mediumly permeable to chloride

Question 10

What is the equilibrium potential for potassium and what does that mean?

Answer 10

-90mV
the potential that the cell would sit at if it was only permeable to potassium