Sept. 8, 2020

Welcome to science class!

Tuesday, Sept. 8, 2020

I can explain how organisms can survive when the external environment is unfavorable

Big Ideas 1. Endothermic organisms maintain their own body

temperature.2. Ectothermic organism’s body temperatures are

the same as their environment.

ESSENTIAL QUESTIONS

Which type of organisms are endothermic? Where on the globe are endothermic organisms found?

Which type of organisms are ectothermic? Where on the globe are ectothermic organisms found?

What is homeostasis? How do endothermic and ectothermic organisms maintain homeostasis?

AGENDA✔ Vocabulary ✔ Notes - video and ppt✔ Exit Ticket

Vocabulary✔ organism - living individual,

such as a plant, animal, bacterium, protist, or fungus; a body made up of organs, organelles, or other parts that work together to carry on the various processes of life

VIDEOS✔ https://youtu.be/quQr6X1Q58I

✔ https://www.brainpop.com/health/bodysystems/homeostasis/

✔

What happens if stability is disrupted?

Remove one stone and the whole arch collapses. The same is true for the human

body. All the systems work together to maintain stability or homeostasis. Disrupt

one system, and the whole body may be affected.

Homeostasisthe physical process that maintains a

stable internal environment. (example: body temperature)

Endotherms• Animals that can generate

& regulate their own body heat.

• Their body temperature stays at a relatively constant level by balancing heat loss with heat production.

• Sometimes referred to as "warm-blooded"

Minimize Heat Loss• Heat loss is minimized in

most mammals by having a thick coat of fur or thick layer of fat beneath the skin.

Making Some Heat

• Digestion- Endotherms have to eat fairly often because they burn calories to support their body temperature as well as other functions.

• Shivering – An involuntary movement that generates heat.

Cool it!Find a cool spot

PantSweat

Reduce Activity Levels (Rest)

All Ears!Radiator ears are a special

adaptation

Some animals have large ears that have blood vessels close to the surface of the skin. If the outside temperature is cooler, heat is released through the ears.

Ectotherms• Animals that rely on

environmental sources of heat.

• Sometimes called “cold blooded” animals, are poorly insulated and produce heat at a low rate compared with endotherms. They also lose heat to cooler surroundings quickly.

• Regulate their body temperatures by behaviors.

Regulate Body Temperature

• Many ectotherms are able to regulate their body temperature behaviorally, by moving into and out of sunlight.

• burrowing under ground /seeking shade

• Moving in and out of water.

They Just Don’t Need the Calories!

• They, therefore, eat only 1/3 to 1/10 of the food needed by endothermic animals.

• An ectotherm has all this energy available for activity, growth, repair and reproduction.

http://www.statemaster.com/encyclopedia/Ectothermic

Don’t eat very often.

Types of Ectotherms

•Reptiles •Amphibians•Fish• Insects

How?

• Snakes and lizards sunning themselves on rocks.

• Fish changing depths in the water to find a suitable temperature.

• Desert animals burrowing beneath the sand during the day.

• Insects that warm their flight muscles by vibrating them in place.

Quick Quiz

1. Any living thing is called an _______________.

A. Plant B. Species C. Organism D. Hybrid

2. A living organism’s ability to maintain a stable internal environment no matter what is going on outside the organism is called ________________.

A. Traits B. Homeostasis C. Chromosomes D. Reproduction

3. In order to survive, all living things need two things; raw materials and a______.

A. Place to live B. Place to reproduce C. Place to run D. Place to develop

Exit Ticket

Explain and give an example of an animal for cooling down for both endothermic and ectothermic.