DLISC1 - week 5

Question 1

what is physiology

Answer 1

• Function and processes of cells, tissues and organs

Question 2

basic life processes

Answer 2

metabolism
responsiveness
moveemnt
growth
differentiation
reproduction

Question 3

what is homeostatsis

Answer 3

• All body systems working together to maintain a stable internal environment
  resistance to change - ensuring that our body functions wihtin a normal range

Question 4

An organism is said to be at homeostasis when it’s internal environment:

Answer 4

• Contains the optimum amount of chemicals
• Has optimal temperature
• Has optimal pressure for the survival of living cells

Question 5

How does the body maintain/regulate homeostasis?

Answer 5

• Intrinsic/autoregulation
  Automatic response within a cell, tissue, or organ to some environmental change
• Extrinsic regulation
  Responses controlled by the nervous and endocrine systems

Question 6

three componnets required fro homeostasis

Answer 6

• Receptor: sensor that monitors physiological environment and signals a change
• Control centre: processes the signal and sends instructions for a response to occur. Determines the level of change required.
• Effector: carries out instructions sent by the control centre

Question 7

negative feedback loop

Answer 7

• The response of the effector reduces or stops the stimulus
• Body is brought back into homeostasis
• Normal range is achieved

Question 8

positive feedback loop

Answer 8

• The response of the effector increases change of the stimulus
• Body is moved away from homeostasis
• Normal range is lost
• For speeding up process

Question 9

example of negative feedback

Answer 9

thermoregulation
regulation of blood sugar
regualtions of blood pressure

Question 10

example of positive feedback

Answer 10

break or tear of a blood vessel
giving birth