Homeostasis

Question 1

Steps of negative feedback

Answer 1

I. Stimulus
2. Receptor
3, input: sent along afferent pathway to control Center
4, output: info sent along efferent to motoreffector
5. Response, returns variable to homeostatic level

Question 2

Explain positive platelet plug

Answer 2

1, break/tear in blood vessel wall
2 platelets adhere to site and release chemicals
s. Chemicals attract more platelets + make item sticky.
4. Platelet plug formed

Question 3

Name the 3 steps and where they occur of cold feedback loop

Answer 3

1. Stimulus (skin/brain cells sensitive to temp)
   2.control Center ( thermoregulator in brain)
2. Effected (skeletal muscles aka. Shivering)

Question 4

Hot feedback loop

Answer 4

1. Temp. Sensitive cells in brain and skin
2. Thermoregulator
3. Sweat glands (effector)

Question 5

Oxytocin stimulator, inhibitor and target organ and effects

Answer 5

Secreted by proterior pituitary, stimulated during birth and breast feeding, inhibited by stress and affects uterus (contractions) and breasts (milk)

Question 6

ADH

Answer 6

Stimulated by dehydration/increase blood solute and inhibited by proper hydration or alcohol, target organ is the kidney that so it absorbs water from forming urine the blood

Question 7

GH

Answer 7

Growth hormone secreted by anterior pituitary
Affects muscles, bones, liver
Affects metabolism by increasing blood glucose and fat breakdown
Anabolic hormone which affects growth promotion indirectly