Endocrine homeostaiss

Question 1

What are the three types of information about a variable in an individual and population

Answer 1

Set point: The ideal functional value for a variable

normal range: Acceptable fluctuation around the set point for a variable

population referance range: The overall range of a variable in a population (wider than a normal range normally)

Question 2

What is the system of event in a negative feedback loop

Answer 2

Stimui causes a change
Sensory detects change and sends to control center
Control center sends signal to invert the change to an effector
Effector acts to oppose the change

Question 3

What are the system of events in a positive feedback loop,

Answer 3

stimuli causes a change
Detected by sensor and informed control center
Control ceneter sends signal to effector to drive to completion
Effector drives the reponse to completion (blood clotting)

Not homeostasis control

Question 4

Name 3 Key differences between the nervous and endocrine system

Answer 4

Nervous must touch effector
Nervous is much faster
Nervous is associated with muscle movement, sensation and higher thinking

Endocrine releases hormones into blood stream doesnt touch effector
Endocrine is a slower response time
Endocrine is associated with reproduction, growth, stress

Question 5

What are the 6 glands in HUB191

Answer 5

Hypothalomus
Thyroid
parathyroid
pituitory
adrenal
pancrease

Question 6

Give an example of a lipid soluble and water soluble hormone

Answer 6

Water: adrenline (catecholamines)
Lipid: cortisol / thyroid hormones

Question 7

What are the 6 differences between lipid and water soluble hormones

Answer 7

Chemical clasification: both amines peptides = water, steroids= lipid
synthesis and storeage: water=all made and stored for use. lipid: cortisol made when needed, Th = made and stored
Transport: water no carrier, Lipid: carrier protein
Receptor location: Lipid: inisde cytosol or nucleus, Water: On the edge of the cell
Action mechanisum: Lipid: causes the production of proteins/ gene transcription Water: activates a secondary reponse system
Reponse duration: water: seconds to minutes, Lipids: hours to days

Question 8

What is the second activation mechanium of

Answer 8

When hormine binds to surface receptor activates the G protein which can act to inhibit or activate secondary messanger system (cAMP) or Ca. The secondary messanger then interacts with proteins to create a change.
rapid as the 2nd messanger is premade.