1 / 22

MAMMALS

MAMMALS. NOLAN, JACQUELINE, LESLIE & SAMANTHA. WHAT IS A MAMMAL. WHAT IS A MAMMAL?- A WARM BLOODED VERTEBRAE ANIMAL OF A CLASS THAT IS DISTINGUISHED BY THE POSSESSION OF HAIR OR FUR, THE SECRETION OF MILK BY FEMALES FOR THE NURISHMENT OF THE YOUNG AND TYPICALLY THE BIRTH OF LIVE YOUNG.

arvid
Download Presentation

MAMMALS

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. MAMMALS NOLAN, JACQUELINE, LESLIE & SAMANTHA

  2. WHAT IS A MAMMAL WHAT IS A MAMMAL?- A WARM BLOODED VERTEBRAE ANIMAL OF A CLASS THAT IS DISTINGUISHED BY THE POSSESSION OF HAIR OR FUR, THE SECRETION OF MILK BY FEMALES FOR THE NURISHMENT OF THE YOUNG AND TYPICALLY THE BIRTH OF LIVE YOUNG.

  3. CHARACTERISTICS OF MAMMALS MAMMALS HAVE HAIR-MAMMALS HAVE HAIR OR FEATHERS THAT PROVIDES INSULATION AND BODY HEAT MAMMALS NURSE THEIR YOUNG- MAMMALS HAVE SEVERAL GLANDS THAT PRODUCE SALIVA, SWEAT, OIL, DEGESTIVE ENZYMES, HOROMONES,MILK & SCENT; MAMMALS FEED THEIR YOUNG FROM MAMMARY GLANDS RESPIRATION & CIRCULATION IN MAMMALS- MAMMALS NEED A HIGH LEVEL OF ENERGY TO MAINTAIN THEIR ENDOTHERMIC METABOLISM; CIRCULATION ALSO REMOVES WASTE PRODUCTS FROM CELLS AND HELPS REGULATE BODY TEMPERATURE

  4. CHARACTERISTICS OF MAMMALS MOST MAMMALS HAVE SPECIALIZED TEETH- MAMMALS WITH TEETH HAVE TEETH THAT ARE ADAPTED TO THE TYPE OF FOOD THEY EAT MAMMALS HAVE MODIFIED LIMBS- MAMMALS LIMBS ARE ADAPTED FOR A VARIETY OF METHODS OF FOOD GATHERING; PRIMATES HAVE OPPOSABLE THUMBS MAMMALS CAN LEARN- MAMMALS TEACH THEIR YOUNG SURVIVAL SKILLS; MAMMALS CAN LEARN AND REMEMBER WHAT THEY LEARNED

  5. DIVERSITY OF MAMMALS • PLACENTAL MAMMALS GIVE BIRTH TO YOUNG THAT HAVE DEVELOPED INSIDE THE MOTHERS UTERUS UNTIL THEIR BODY SYSTEMS ARE FULLY FUNCTIONAL • UTERUS- A HOLLOW MUSCULAR ORGAN IN WHICH OFFSPRING DEVELOP • THERAPSIDS- A GROUP OF REPTILIAN ANCESTORS • SPECIES DIVERSITY IS A MEASURE OF THE AND FEQUENCY OF SPECIES IN A COMMUNITY • MAMMALS EVOLVED FROM A GROUP OF REPTILES CALLED THE SYNAPSIDS THAT AROSE 310 TO 275 MILLION YEARS AGO • MAMMALS ARE A CLADE OF ENDOTHEMIC AMNIOTES

  6. Animal Behavior http://www.flickr.com/photos/fpat/3375999258/

  7. What is a behavior? Any response to a stimulus (an external signal) Examples of stimuli • Sounds • Smells • Sights (light vs dark)

  8. Why do behaviors exist? Most behaviors have some evolutionary history (the behavior aided survival) Can you think of any examples of behaviors that might have helped our ancestors survive?

  9. Two Types of Behavior Innate – behavior you are born with, also called INSTINCTS Learned – behavior that develops through experience

  10. Some human instincts…. Grasping reflex Holding breath when submerged Pupil dilation

  11. Even very young babies can learn to swim

  12. Learned Behaviors • Habituation • Classical Conditioning • Operant Conditioning • Insight Learning

  13. HABITUATION When  your body becomes accustomed to a stimulus. Ex.:  Some animals respond to loud noises by hiding.  If the noises are repeated, the animal stops hiding.

  14. Baby toys are designed to stimulate their brains.  Babies learn by "trial and error"

  15. Classical Conditioning Pairing two stimuli together, response becomes the same Pavlov's Dogs - ring a bell when  feeding dogs.  Eventually, the dogs would salivate when they heard the bell ring.

  16. OPERANT CONDITIONING Involves "training" a behavior using a reward or punishment system. Examples:  Rat gets treat when it hits a lever     Rat gets shocked when it climbs a structure     Dog gets treat when it sits on command

  17. The Skinner Box used to train rats

  18. Insight Learning Involves using the brain to develop solutions to problems never before encountered. This is not "trial-and-error."  The animal (or human) must build on prior experiences to solve a problem Have you ever noticed that a dog tied outside gets tangled in its leash, he can't figure out how to get untangled

  19. Lets RECAP Insight Learning/ Classical Conditioning / Operant Conditioning / Reasoning Match the description to the type of learning. 1.  A chimpanzee figures out how to escape his cage by unlocking the latch 2.  A dog sits on command and receives a treat. 3.  Rats push a lever for food (Skinner box) 4.  A bell is run when dogs are fed.  Dogs drool whenever they hear the bell. 5.  Babies grasp their hands around objects.

  20. Quick Quiz 1.  A behavior is an __________________, performed in response to a ______________________ 2.  Rats in the Skinner box learned to push a ______________ to get  _____________ 3.  The fact that you are awake in the day and asleep at night is an example of a _________________ rhythm 4.  When an animal stops reacting to a stimulus that happens over and over, it is called _________________ 5.  Natural selection favors behaviors that help an animal ___________

More Related