Lecture 18 Flashcards
Where does heat production occur in animals?
It occurs in the organs .
Where does heat loss happen in animals?
It happens in the extremities.
What are examples of extremities in animals?
Ears, fingers, and toes.
How do furs and feathers keep animals warm?
They do so by increasing the boundary layer.
Define Boundary Layer
The region near a surface where the fluid velocity drops to zero (air becomes trapped).
Define Blubber
It is a fat specialized for insulation.
What is blubber consisted of mainly?
It is mainly consisted of fat.
What sort of fat is blubber and what is the function of that?
White fat (used for storage)
What does countercurrent exchange mainly involve?
The organization of the blood vessels.
How does Countercurrent Exchange work?
Countercurrent exchange is a means an animal can stay warm; they do so through transferring the heat coming from their core (warm blood) to vessels that are exposed to colder spots.
How does countercurrent flow minimize the loss of heat in extremities?
It does so through the gradients.
What are important things to note about Concurrent Flow?
Blood flow occurs in the same direction and the arteries and veins don’t flow near one another.
What are some important things to note about Countercurrent Flow?
Blood flows in the opposite direction and the vessels sit next to one another.
Define Thermogenesis
Keeping warm through burning calories.
What is an example of Thermogenesis?
Shivering.
