Homeostasis

Question 1

What are human survival needs?

Answer 1

Nutrients (glucose, protein, fats)
Oxygen
water Body Temp
Atmospheric Pressure

Question 1

Who invented Homeostasis?

Answer 1

Claude Bernard

Question 2

What are the components of the homeostasis Regulation system?

Answer 2

Control Center (Brain endocrine)
Effectors (muscles organs or glands)
Receptors (Montor)

Question 3

What is homeostasis?

Answer 3

Body’s ability to maintain stable environment
- Dynamic
-Responsive
-e.g Temp Regulation

Question 4

Negative feedback Dfn.

Answer 4

Reverse change in a controlled condition
drastic change

Question 5

Temperature Range

Answer 5

35.6-37.8 degrees celcius

Question 6

Receptors

Answer 6

Thermoreceptors

Question 7

Control centers

Answer 7

(hypothalmus Brain)
Hypothalamic regulatory center

Question 8

Effectors

Answer 8

(muscles and glands)
controlled by antagonist action
Push Pull Effect

Question 9

Negative Feedback: Function

Answer 9

prevents sudden change in the body
maintains things in normal limits

Question 10

Negative Feedback: Directed

Answer 10

by receptors
indicate weather levels are too high or too low

Question 11

Negative feedback: Activates

Answer 11

Effectors
induce opposite effect

Question 12

Positive Feedback: Function

Answer 12

Controls infrequent events that do not require continuous adjacent

Question 13

Positive Feedback: Response

Answer 13

Effectors intensifies/Reinforces
controlled by condition change

Question 14

Positive Feedback: Change

Answer 14

Continues until interupted
homeostasis restored

Question 15

Positive Feedback: Exapmles

Answer 15

blood clotting
ovulation (oestrogen)
labour contractions (oxytocin)

Question 16

What is Autonomic Nervous System? (ANS)

Answer 16

“self controling”
Network of nerves that communicates with in the body
Controls involuntary physiological functions and maintains homeostasis
E.g. normal heart rate
blood pressure
digestion
breathing

Question 17

What is the ANS function to homestasis?

Answer 17

Maintain Homeostasis and stable enviorment

Question 18

Sympathetic System

Answer 18

Moblises Fight or flight
- accelerates body processes
- activated when threatened or challenged
-increased functions
- 3 es excersise, excitement and emergency

Question 19

Parasypathetic

Answer 19

Relaxes - rest and digest
Vagus nerve (2nd largest)
looks after recuperation
controls heart rate under normal conditions

Question 20

Humans = homeothermic

Answer 20

require stable core temperature

Question 21

Homeostasis and temp regulation

Answer 21

S1. exceeds upper limit
signals sent to peripherary
vasodilation of BV
excess heat to exterior

S2. Drops below set limit signals (via effectors)
sent to periphery to conserve heat
shivery, vasoconstriction and assumption of huddle position.