Chemical Cordination

Question 1

Hormones

Answer 1

• Hormones are chemical messengers released by glands in to the blood to co ordinate a change in the body

Question 2

how quick?how long they last for?type of signal?

Hormones v nerves

Answer 2

• Hormones are slower than electrical impulses
• Hormones act for a longer time than nerves.
• Hormones are a chemical signal whereas nerves send out electrical impulses

Question 3

what does it do?where is it made?

Adrenaline Hormone

Answer 3

• Increased Heart Rate and Breathing rate
• secreted from adrenal glands
• Glucose released from liver

Question 4

Knock on effects of the Adrenaline effects (5 marks)

Answer 4

-> Increased Heart rate: Increased volume of Oxygenated blood delivered to muscle cells therefore more muscle cell aerobic respiration

-> Prepares body for muscle contractions - Flight response

-> Glucose from liver - more glucose for more aerobic respiration and to break down oxygen debt from anaerobic respiration

-> More aerobic respiration = more energy released therefore preparing body for more muscle contractions