Lab 8 Flashcards
hermaphrodites cannot
feritlize themselves with their sperm
muscles work against water
hydrostatic skelton
chemcials that exert effects upon the physiology of organisms
bioactive chemicals
organic compounds contaning rings of nitrogen and are alkane or basic in solution; bitter taste and end with -ine; often act upont he nervous system by mimicking the effects of neurotransmitters
alkaloids
natural chemicals of the nervous system
neurotransmitters
some are stimulants, other depressants, others halluciogen; ex: cocaine, morphine, nicotine, caffeine
alkaloids
many of the most usefull bioactive chemicals are
alkaloids
Belong to the largest group of plant chemicals and serve a variety of functions in plants; they are the principle ingredients in plant-derived perfumes, soaps, flavorings, dyes, and many medicines
Terpenes
Group of terpenees that have drawn the attention of researchers because they often are the active ingredient in many herbal preparations
Lactones
Defining characteristic is the presence of a sugar group but it is what is attached to the sugar that defines the biological activity
Glycosides
Glycosides may be classified as
Cyanogenic, cardioactive, or sapogenic
This type of glycosides release cyanide; plants containing this type of glycoside are usually considered poisonous rather than therapeutic
Cyanogenic
This type of glycosides affect the circulatory system, specifically the heart; depending on the dosage it can poison the heart by causing heart failure or act as a medicine to strengthen the heart
Carioactive
This type of clycosides have a steroidal component; steroids are physiologically important as many hormones are steroids; found in some plants have been precursors for creating synthetic hormones;
Sapogenic
Examples are salicin (base of aspirin) and the collective name for many principle ingredients in aloe vera
Glycosides
Segmented worms; body is organized into repeated rings or segments; found in terrestrial, freshwater, and marine environments
Annelid
Annelida with few bristles
Oligochaeta
Little bristles
Setae
Few
Oligo
Mudworm; found throughout north america at the edge of freshwater nods, lakes, and marshes; eat organic debris and microscopic algae
California blackworm
Blood is contained within blood vessels
Closed circulatory system
Along the backside
Dorsal
Acts as the heart, pumping in the blood through wave-like contractions of its muscular walls
Dorsal blood vessel
Blood is bright red in color due to the presence of
Hemoglobin-like pigment that transports oxygen