L1.1 Fundamentals of Physiology

Question 1

what are the levels of organisation in the body?

Answer 1

chemicals, cells, tissues, organs, body systems, whole organism

Question 2

what do you call the fluid inside and outside a cell?

Answer 2

extracellular fluid (outside), intracellular fluid (inside)

Question 3

what maintains the composition of the ECF to keep cells alive?

Answer 3

the organ systems

Question 4

explain the process of homeostasis

Answer 4

the body systems maintain homeostasis which is essential for survival of cells which make up the body systems (continues in a loop)

Question 5

define homeostasis

Answer 5

the maintenance of relatively stable conditions inside the body (despite large changes to the external environment)

Question 6

what is homeostasis controlled by?

Answer 6

the nervous and endocrine system

Question 7

explain negative and positive feedback

Answer 7

negative: maintains homeostasis (when a change in body is detected, mechanisms that are set in place bring the variable back to normal)
positive: allows the body to operate outside the homeostasis range (occurs when a physiological change leads to an even greater change)

Question 8

which is more common: negative or positive feedback?

Answer 8

negative feedback

Question 9

disruptions in homeostasis leads to _____

Answer 9

disruptions in homeostasis leads to DISEASE