Animal Function: Chapter 40 Textbook Notes Flashcards
Animal form= ?
Animal function
What constraintscontribute to convergent evolution
Physical laws won’t allow for the evolution of an animal’s size and shape
What is convergent evolution
When organism find their way to the same evolutionary solute for the same environmental problem
Describe animal cells
Must have access to an aqueous environment, 2 layered sacs with flat shapes
Body hierarchy for animals
Cells → tissues → organs → organ systems
What types of tissue are there
Epithelial, connective, muscle, and nervous
Function of epithelial tissue
Forms active interfaces on external and internal surfaces
Function of connective tissue
Binds & supports other tissues
Function of muscle tissue
Contracts moving body parts
Function of nervous tissue
Transmits nerve impulses throughoutthe body
What systems help the body communicate with different locations in the body
Endocrine system through noromones that signal to their cells and the nervous system electrical and chemical signals to send info
Feedback control maintains….
The internal environment in many animals
An animal who controls an internalvariable
A regulator
What is conformer
An animal that allow an internal variable to vary with external changes
Homeostasis
The maintenance of a steady state despite internal and external changes
Homeostatic mechanisms are usually based on…..
Negative feedback
Negative feedback
The response reduces the stimulus
Positive feed back
Stimulus is amplified by response and brings about a change in state
Ex) the transition from pregnancy to childbirth
Circadian rhythms
Regulated change; daily fluctuations in metabolism an a behavior tuned to the cycles of light and dark in the environment
Home static process for thermoregulation are:
Form, function and beaver
How are endothermic animals warmed
Generate heat by metabolism (from inside, out)
Ectothermic animals
Get heart for the body from external sources
Polkailotherms
Body temp varies with environmental temp
Homeotherms
Body temp remains relatively constant despite environmental temp
