Homeostasis

Question 1

Name physiological parameters

Answer 1

Internal temp
Blood pressure
Blood sugar
Heart rate
Respiratory rate
O2 saturation
Co2 levels
pH

Question 1

What is Homeostasis?

Answer 1

The process by which the body maintains physiological parameters within the normal range, against the challenge of external factors.

Question 2

What systems regulate/manage homeostasis?

Answer 2

Feedback loops (positive and negative)

Question 3

Describe a positive feedback loop

Answer 3

Bleeding -
Platelets will continuously increase at the site of cut until bleeding stops.

Question 4

What does a positive feedback loop do?

Answer 4

They reinforce conditions.
They reinforce a change.

Question 5

What is the most common feedback loop?

Answer 5

Negative

Question 6

What does a negative feedback loop do?

Answer 6

They regulate conditions.
They reverse a change.

Question 7

How does a negative feedback loop work?

Answer 7

Stimulus is picked up by receptor.
Info is sent by afferent nerve to control centre.
Info is sent by efferent nerve to effector.
Response occurs to reduce effect of stimulus.

Question 8

How do we measure homeostasis?

Answer 8

Clinical signs (appearance)
Symptoms (pain and RR)