Types of Body Regulation

8/3/2019 Types of Body Regulation

1/17

Distinguishing torpor, hibernation

and aestivation


2/17

- is the dropping of body temperature to approximatelyambient temperature for a part of each day regardless ofseason.

- reducing energy demands over that part of the day inwhich the animals are inactive

- in torpor, the animals dont seem to see, hear or feel

anything that surrounds them.


3/17


4/17

- Bats, the California pocket mouse, andthe dormousewho sleep during daytime but are up andactive at night .

- Hummingbirds and frogs who are up and active duringthe day but sleep the night away.


5/17

- long seasonal torpor

- physiological changes as decreased blood sugar,increased liver glycogen, altered concentration of blood

hemoglobins, altered carbon dioxide and oxygen contentin the blood, altered muscle tone, and darkened skin

- heart rate, respiration, and total metabolism fall and

body temperatures fall below 10 C

- acidosis ( high levels of CO2 and acid)


6/17


7/17

- groundhog feed heavily in late summer to store large fat

reserves from which they draw energy during hibernation

- chipmunks lay up store of food- they spend less time in torpor

- Although popularly said hibernating, black, grizzly, andfemale popular bears do not. Instead they enter a uniquewinter sleep from which they easily rouse. They do notenter on extreme hypothermia

- they recycle urea from urine through the bloodstream.The urea is degraded into amino acids that arereincorporated in plasma protiens


8/17

- animals that aestivates are trying to escape from the

environmental condition that is happening

- this protects animals from high temperature and

drought

- body, breathing and heartbeat slows down

- animals dont grow, move or eat during this time

- aestivates during the middle of the summer


9/17


10/17


11/17

Animals have a more complex and more

energy-expensive problem than plants inmaintaining water balance. All animals possessa more or less universal mechanism, the

excretory system. The system is simple insome animals and complex in others.


12/17

Water animals osmosis

Amphibians skin and gill membranes

Terrestrial animals drinking eatingandrespiration


13/17


14/17

Animals of semi-arid and regions may

either: - evade drought by moving the dry

season - move to area where permanent

water is available


15/17

- some animals remain active during thedry season by lowering the temperature

they breathe out


16/17

- some animals reduces daytime losses ofmoisture by becoming hyperthermic

- a substantial rise in daytime bodytemperature reduces the need forevaportion

- reduces metabolic rate by lowering tits

internal production of heat


17/17

In addition some desert mammals cantolerate a certain degree of dehydration.

Desert rabbits may withstand water lossesof up to 50 percent and camels up to 27percent of their body weight

Documents

Types of Body Regulation