Week 1- Homeostasis

Question 1

Define homeostasis

Answer 1

The process of keeping the body at homeostatic equilibrium, maintanance of internal body environment

Question 2

Explain negative feedback

Answer 2

When the body reacts after a stimulus to maintain homeostasis, most common

Question 3

Explain feed forward

Answer 3

When the body reacts before a stimulus e.g. salvation before eating

Question 4

Explain positive feedback

Answer 4

When the body amplifies the reaction e.g. action potentials

Question 5

How is homeostasis maintained

Answer 5

Through negative, positive and feed forward inhibitions. Involved cooperation action of organ systems controlled by nervous system and endocrine system

Question 6

Identify fluid components of cells

Answer 6

Extracellular fluid (ECF) outside cells contains plasma and ISF. Plasmas is in blood vessels and the ISF is in the cell membrane. intracellular fluid (ICF) inside cells

Question 7

How to calculate ICF

Answer 7

Can’t measure it but ECF - plasma

Question 8

Explain dilution principle

Answer 8

Inject substance that will only stay in one compartment, calculate volume of distribution amount injected/ concentration of sample