section 28 2 homeostasis n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Section 28-2 “Homeostasis ” PowerPoint Presentation
Download Presentation
Section 28-2 “Homeostasis ”

Loading in 2 Seconds...

play fullscreen
1 / 7

Section 28-2 “Homeostasis ” - PowerPoint PPT Presentation


  • 156 Views
  • Uploaded on

Section 28-2 “Homeostasis ”. Write everything that is underlined. KEY CONCEPT Homeostasis is the regulation and maintenance of the internal environment of the body. I. Homeostasis Conditions within the body must remain within a narrow range – like your body temperature.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Section 28-2 “Homeostasis ”' - mahogany-spence


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.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
section 28 2 homeostasis

Section 28-2“Homeostasis”

Write everything that is

underlined

slide3
I. HomeostasisConditions within the body must remain within a narrow range – like your body temperature

a. Homeostasis involves keeping the internal environment within set ranges

slide4

pore

sweat

glands

hair

follicle

muscle

goose

bump

b. Control systems help maintain homeostasis.

  • sensors gather data
  • control center receives data, sends messages
  • communication system delivers messages to target organs, tissues
  • targets respond to change
slide5

II. Feedback Loops

a. Negative feedback loops are necessary for homeostasis

  • Feedback compares current conditions to set ranges.
  • Negative feedback stops the change
slide6

Holding breath,

CO2 levels rise

O2 /CO2 level returns to normal

Control system forces exhale, inhale

b. Negative Feedback Loop Example:

slide7

platelets

blood vessel

fibrin

clot

white blood cell

red blood cell

  • Example: Torn blood vessel stimulates release of clotting factors

c. Positive feedback increases change

  • growth hormones stimulate cell division