Biology Homestasis Flashcards
Are endothermic organisms warm-blooded or cold-blooded?
Warm-blooded.
What are some of the physical characteristics of endotherms?
Feathers, fur, and clothing.
What are ectothermic organisms?
Cold-blooded organisms.
Do ectotherms process more energy or endotherms?
Endotherms because they convert their own energy.
Do ectotherms or endotherms need to eat less?
Ectotherms.
What does WSICTU?
Water.
Sugar.
Ions.
Carbon Dioxide and Ceullar Respiration.
Temperature.
Urea.
What does a negative feedback system do?
Bring levels back to normal or decrease them entirely.
Example: Blood pressure decreasing to normal.
What does a positive feedback system do?
Example: Childbirth
Moves the reaction or result in a certain direction.
What do feedback mechanisms in general do?
Maintain internal conditions despite a changing environment.
What is the hypothalamus typically known as when it comes to feedback systems? (HINT: Two-part answer)
The Control Center
What are some homeostasis disruptions? (HINT: The three D’s)
-Death
-Disorder
-Disease
What do ectotherms rely on to maintain their temperatures?
Their environments.
What is the stimulus?
A thing or event that creates a reaction in either organs or tissues.
What is a receptor?
Type of sensor that monitors the environment and its changes.
What is the control center?
Determines the level or set point that a variable must be maintained to analyze information by the receptor.
What is an effector?
Provides a pathway for the response to get back to the stimulus to create either a positive feedback system or negative feedback system.
What does the hypothalamus do for homeostasis?
-Food intake
-Heart rate
-Hormone levels
-Body temperature
How do endotherms stay warm?
-Vasoconstriction (Muscles constrict)
-Shivering
How do endotherms stay cool?
-Vasodilation (Muscles dilate)
-Sweating
Why do large animals need to eat so much to stay warm?
They have more muscle mass to keep warm.
What are the advantages of being an endotherm?
Endotherms can survive different environments.
True or False: Humans are endotherm and homeothermic.
TRUE
Which animals are endothermic?
Mammals, birds, and a few other exceptions.
TRUE OR FALSE: Most energy or calories go into regulating body temperature.
TRUE
TRUE OR FALSE: ATP is the body’s battery power.
TRUE
TRUE OR FALSE: Maintaining a regular body temperature is relatively cheap.
FALSE
TRUE OR FALSE: Being endothermic is a mutation to becoming warm-blooded.
TRUE
What did the secondary palate do?
Eating while breathing allowed for more energy to be consumed.
What was the Great Dying?
Temperatures rising from volcanoes that had higher metabolisms.
Were dinosaurs more like endotherms or ectotherms?
Endotherms.
TRUE OR FALSE: Ectotherms have a higher metabolism.
FALSE
TRUE OR FALSE: Endotherms tend to be better parents.
TRUE - They have more energy to put into nurturing their young.
