Unit 6 Bio Test 2

Front 1

Metabolism

Back 1

a process in which organisms break down food molecules causing the energy that is stored in food to release
*term to describe the collection of chemical reactions that occur in all organisms

Front 2

embryo

Back 2

a developing plant

Front 3

endosperm

Back 3

food source for the developing plat embryo

Front 4

weight-specific metabolic rate

Back 4

the oxygen consumtion rate expressed on a per gram basis (ex. the # ml of ox/gram of roach in a min)

Front 5

ectotherms

Back 5

the source of body heat is outside of the body (animals) *advantage: being energetically cheap, spends no energy on maintaining body temp, so energy can be used to eating or reproducing. Disadvantage- 'prisoners of their environment'-- if the air temp is low then body temp (and metabolism) are low

Front 6

endotherms

Back 6

organism whose body temp is maintained independent of environmental temp (advantae: can utilize a wide range of habitats, consume more oxygen than ectotherms- disadvantage- cost of energy to control body heat, also limits endo body size- small animals have very high weight specific metabolic rates-- must burn lots of fuel to compensate for heat loss due to the high surface-to volume- ratio of small bodies.

Front 7

alveoli

Back 7

tiny air sacs at the ends of bronchioles in the lungs

Front 8

bronchi

Back 8

tubes branching from the trachea and directing air into each lung

Front 9

bronchioles

Back 9

tubes from the bronchi that lead to clusters of alveoli

Front 10

diaphram

Back 10

muscle sheet at the bottom of the chest cavity; contraction of this muscle draws air into the lungs

Front 11

epiglottis

Back 11

flap at the top of the trachea that prevents food from entering or blocking air pathway

Front 12

spiracle

Back 12

opening in arthropod body wall through which air enters tracheae

Front 13

thermal strategy

Back 13

metabolic patterns of organisms

Front 14

trachea

Back 14

air tub leading from back of the mouth down into the chest cavity, aka "the windpipe"

Front 15

tracheae

Back 15

tiny tubes in the insect body that deliver oxygen directly to metabolizing tissues