13.1 Coordination

Question 1

what are changes in a organism’s internal environment

Answer 1

• blood glucose conc
• internal temperature
• water potential
• cell pH

Question 2

what are changes in an organism’s external environment

Answer 2

• humidity
• external temperature
• light intensity
• new/sudden sound

Question 3

explain homeostasis in relation to coordination

Answer 3

• maintain a relatively constant internal environment

- digestive organs along with the endocrine pancreas and liver work together to maintain constant blood glucose conc

Question 4

explain cell signalling in relation to coordination

Answer 4

• cells can transfer signals locally via neurotransmitters

- can transfer signals across large distances using hormones

Question 5

how does coordination work in plants

Answer 5

through the use of plant hormones