Chapter 41 Flashcards
an animals diet must satisfy these three things:
- chemical energy: fuel to power body
- organic molecules: raw nutrients to build an animals own molecules
- essental nutrients: substances the animal cannot make for itself
food energy is used to produce ____________ which powers the activities of cells and ultimately entire organisms
ATP
ATP is usually maintained from ________________ and stored or burned during __________________
carbohydrates or lipids
cellular respiration
macromolecules are __________________ and used as raw materials needed for animals own macromolecules
dissassembled
_______________ is the maintance growth and reproduction that occurs when macromolecules are dissassembled and reassembled
biosynthesis
________________ is a molecule that obtained from carbohydrates, lipids, proteins, and nucleic acids
carbon
___________________________ is a molecule obtained from proteins and nucleic acids
nitrogen
4 certain nutrients must be obtained in preassembled form because an animal cannot manufacture them from raw materials
- essential amino acids
- esssential fatty acids
- vitamins
- minerals
4 certain nutrients must be obtained in __________because an animal cannot manufacture them from raw materials
preassembled form
proteins are built from _____________ different amino acids
20
animals can produce _________ amino acids on their own
12
__________ amino acids must be directly consumed
8, the essential amino acids
________________ are complete proteins providing _______________ amino acids
animal proteins ex- eggs, milk, meat, cheese
all 8 essential
__________________ are incomplete proteins lacking _______________________ amino acids
plant proteins
specific plant combinations are required to obtain _____________
all 8 essential proteins
___________________ are synthesized by linking fatty acids to glycerol
fats and phospholipids
animals __________________ their fatty acids
synthesize most of
a few _________________ cannot be synthesized and must be consumed by animals
unsaturated fatty acids (essential fatty acids
________________ is used to manufacture of membrane phospholipids
linoleic acid
example of ample amounts of essential fatty acids
seeds, grains, and vegetables
_______________ are organic molecules required in an animals diet in very small quantities
vitamins
animals require _____________________
13 different vitamins
__________________ are inorganic nutrients required in an animals diet in very small quantities
minerals
4 functions of digestive system
- ingestion
- digestion
- absorption
- elimination
_____________ is taking food into body
ingestion
____________ processing food, breaking down into its component nutrients
digestion
what are the 2 kinds of digestion
- mechanical digestion
- chemical digestion
________________ physically break downs food into its smaller parts
mechanical digestion
_________________ breaks food into its component nutrients by way of enzymes
chemical digestion
_________________ transporting the nutrients into the bloodstream so they can be delivered to all of the body cells
absorption
_______________ not all component of food can be digested and absorbed. Undigestible wastes are eliminated form body by way of defication
elimination of waste
sponges exhibit ________________ digestion
intracellular
in ______________________ food particles are trapped by choanocytes and digested in ameobocytes
intacellular digestion
ingestion porifera cells
choanocytes
digestion porifera cells
ameobocytes
all other animals exhibit ______________________
extracellular digestion
during _____________________ digestion occurs outside of an animals cells. occurs within compartments that are continuos with the outside of the animals body. nutrients are them absorbed by cells
extracellular digestion
cnidarians and flatworms possess a __________________________
gastrovascular cavity
in a gastrovascular cavity:
_______________________ occurs within the cavity
a single opening functions in ____________________________
digestion and absorbtion
ingestion and elimination
animals other than (porifera, cnidarians, and flatworms) possess an ________________
alimentary canal
________________________ is a digestive canal is a digestive tube that extends between two openings
alimentary canal
____________________ are compartmentalized within specific organs along the length of the alimentary canal
digestion and absorption
________________ connect to the alimentary canal and secrete products into its way of ducts
accessory digestive glands
_______________________ is the entrance into the alimentary canal and is the only digestive organ that function in ______________________
oral cavity- ingestion
oral cavity begin the process of ___________________
mechanical and chemical digestion
_________________ function in mechanical digestion by way of chewing
teeth
________________ secrete ___________ into the oral cavity by way of ducts that contain enzymes to initiate chemical digestion
salivary glands
saliva
sliva contains the enzymes ____________ to initiate the digestion of ___________
amylase
starch
________________ aids in mechaincal and chemical digestion. The tongue mixes food with saliva
tongue
___________________ mixed food with siliva
bolus
the pharynx ____________________ is a common passage for food and air
throat
the pharynx ____________________________________________
propels food from the oral cavity to the esophagus
____________________ connects the pharynx to the stomach
esophagus
______________ propels food through the esophagus
peristalsis
peristalsis is accomplished by way of __________________
smooth muscle tissue
_______________ lines the inner wall of the esophagus to protect aginst abrasion
stratied squamos
there is no ___________________ in esophagus
digestion or absoption
the stomach is a _____________________ in which the bolus is __________________
storage organ
mechanical and chemically digested
__________________ digestes proteins
gastric juice
_________________________ composed gastric juice
hydrochloic acids and the enzyme pepsin
gastric juice is produced and secreted by the stomachs _____________________
simple collumnar epithelium
_____________ in the stomach churns the food to mechanically digest it
smooth muscle
by the time food leave the stomach it is in a liquid form called ____________________
chyme
___________________ is found between esophagus and stomach
cardiac sphincter
the cardiac sphincter keeps ____________________________
stomach acid from flowing into the esophagus
__________________________ is found between the stomach and the deodenum
pyloric sphincter
_________________________ the beginning of small intestine
deodenum
pyloric sphincter regulated the passge of _______________ into the small intestine
chyme
_______________ is the major digestive system organ
small intestine
__________________________ is complete in the small intestion but almost all _________________ occurs in small intestine
digestion
absorption
three region of small intestine
- deudenum
- jejunum
- lleum
_____________ shortest region that connects the stomach. where final digestion occurs
duodenum
_________________ middle region of small intestion where most absorption occurs
jenunum
______________ the longest region that connects to the large intestine. where final absorption occurs
lleum
small intestine inner lining forms ________________________________
folds which slow chyme passage
the small intestine has a _________________________
huge surface area for absorption
the intestine __________ increase its ____________
length surface area
the circular folds consists of projections called ____________________ which increase their surface area
villi
the villi contain _____________ which further increase surface area
microvilli
within each villus is a _____________ a capillary network into which nutrients are absorbed
lacteal
__________________ connect to the alimentary canal by way of __________
liver, gallblatter, pancreas
ducts
liver, gallblatter, pancreas secrete their products into the _____________________
deodenum
______________ produce bile
liver
bile is secreted into the ______________________
right and left hepatic ducts
right and left hepatic ducts merge to form the _______________
common hepatic duct
liver stores ________________________
glucose in the form of glycogen
the gallblatter _____________________________
stores and concentrate bile produce by liver
________________ carries bile to and from the gall bladder
cystic ducts
_____________________________ merge to form the common bile duct
cystic ducts and common hepatic duct
________________ secrete pancreatic juice into the main pancreatic duct
pancreas
the main pancreatic duct and and common bile duct merge into the
hepatopancreatic ampulla
hepatopancreatic ampulla empties bile and pancreatic juice into ________________________________
deudenum by way of major duodenal papilla
pancreatic juice is an ____________ solution that __________________________ entering the
alkaline
neutralizing the acidic chyme
_____________________ is not as long as the small intestine, but has a much larger diameter
large intestine
the large intestine function in the absorption of _______________ from the remaining _________________ converting it to _________________
water chyme feces
the large intestine is the only allimentary canal organ involved in _____________________
ellimnination of feces
the begging of the large intestine is a blind ended sace called _____________
cecum
the _______________ of the small intestine is connected to the ___________ of the large intestine
ileum
cecum
__________________ is a slender organ attached to the cecum
appendix
the appendix contains _______________
lympatic tissue
_________________ of the large intestine forms a frame around the small intestine
colon
the colon lead to the rectum, an organ that __________________ until it can be eliminated
stores the feces
the rectum leads to the _________________ the final portion of the large intestine (and therefore of the entire elementary canal_
final portion of large intestine
________________ contains two muscular _________________ that regulate defecation
anus
sphincters
_________________ have two seperate organs in place of a single stomach
earthworms
- crop
- gizzard
the crop _________ food
stores
the gizzard __________ food
digests
__________ have a crop, stomach, gizzard
birds
_________ feeders strain small food particles from the water
filter
_________ feeders strain small food particles from water
fluid
_______________ feeders ingest large pieces of food
bulk
herbivores eat _________
plants or algae
carnivores eat ___________
other animals
omnivores eat _____________
plants and other animals
a significantly lower _______________. Herbivores do not need to chase or capture prey. Prey are therefore easier to obtain.
energy expenditure
________ is an essential mineral nutrient for animals but not for plants.
sodium
herbivores must supplement their diets with natural ___________________
salt licks
plants have a ________________ ration
high carbon to nitrogen
animals have a __________________
low carbon to nitrogen ratio
to obtain enough nitrogen, herbavors must eat __________ plants
more
plants have defenses:
physical: _____________
chemical: _____________
thorins and spins
toxins
another difficulty of herbiovority
plants contain large amounts of cellulose and lignin which are indigestable for animals
herbavors tend to have a _______________________________________
much larger and longer intestine. This reflects the longer time needed to process vegatation.
most herbavores have _______________ relations with ___________
mutualistic
microorganisms
horses and koalas house microorganisms within the __________________
cecum
rabbits exhibit ________________
coprophagy
_____________________ reconsuming feces recovers nutrients available in the large intestine after absorption has already occured in the small intestine
coprophagy
____________ exhibited by sheep and cattle. They possess a four chambered stomach containing prokaryotes and protists
ruminants