y11 human bio- SLO8
Call Kai
Learn
Practice Test
Spaced Repetition
Match
Flashcards
Knowt Play1/12
There's no tags or description
Looks like no tags are added yet.
Name | Mastery | Learn | Test | Matching | Spaced | Call with Kai |
|---|
No analytics yet
Send a link to your students to track their progress
13 Terms
What is homeostasis?
Maintaining a stable internal environment within tolerance limits
What is negative feedback?
A response that reverses a change to restore normal conditions
Give an example of negative feedback
Thermoregulation, blood glucose regulation, regulation of breathing rate
How is breathing rate regulated?
Chemoreceptors detect high CO2 levels and signal the medulla to increase breathing rate
What are chemoreceptors?
Receptors that detect changes in CO2, oxygen and pH
How is heart rate regulated?
The medulla adjusts SA node activity through the autonomic nervous system
What are baroreceptors?
Receptors that detect changes in blood pressure
How does excercise affect breathing rate?
CO2 production increases, causing breathing rate to increase.
How does excercise affect heart rate?
The medulla increases SA node activity to deliver more oxygen to muscles
What happens if breathing rate does not increase properly?
CO2 builds up, oxygen levels fall, and preformance decreases
What happens if heart rate does not increase properly?
Tissues recieve less oxygen and fatigue occurs earlier
What happens if feedback systems fail completely
Disease or reduced body performance can occur
Give examples of diseases caused by feedback faliure
Diabetes, heart stroke, asthma, heart faliure