BIO210 EXAMS QUESTIONS AND ANSWERS
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Chondrocranium
bottom and sides of braincase.
Splanchnocranium
arches that support gills and jaws
derived from neural crest
cartilage precursor
dermatocranium
dermal bone that surrounds most of the cranium
Prehension
grasping of food
durophagy
The eating behavior of animals adapted to crush bones
mastication
chewing
cranial kinesis
-extra mobility of skull & jaw bones
-allows greater range of prey
paleostyly
no arches are attached directly to the skull
Autostyly
palatoquadrate is suspended from the chondrocranium hinging with meckels cartilage
Hyostyly
palatoquadrate and meckels cartilage hinge on hyomandibula
spirical betwean the hyoid and mandibular arch
Modified Hyostyly
type of jaw suspension seen in most teleosts, in which the jaws are suspended from the
hyomandibula, the palatoquadrate is reduced to a quadrate, and new bones such as the
symplectic, preopercle, or metapterygoid may be involved.
suction feeding
food is drawn into mouth along with the water column
pharyngeal jaws
second pair of jaws in the throat in some fish
Metautostyly
jaw suspension found in amphibians, reptiles, and birds, in which the hyomandibula is
no longer associated with the jaws, but is modified into a columella or stapes, and the
jaw articulation is between the quadrate and articular.
Streptostyly
type of cranial kinesis found in most lizards, snakes, and birds, which have the ability to
pivot the quadrate bone, allowing a better angle for crushing food items.
Craniostyly
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Chondrocranium
bottom and sides of braincase.
Splanchnocranium
arches that support gills and jaws
derived from neural crest
cartilage precursor
dermatocranium
dermal bone that surrounds most of the cranium
Prehension
grasping of food
durophagy
The eating behavior of animals adapted to crush bones
mastication
chewing
cranial kinesis
-extra mobility of skull & jaw bones
-allows greater range of prey
paleostyly
no arches are attached directly to the skull
Autostyly
palatoquadrate is suspended from the chondrocranium hinging with meckels cartilage
Hyostyly
palatoquadrate and meckels cartilage hinge on hyomandibula
spirical betwean the hyoid and mandibular arch
Modified Hyostyly
type of jaw suspension seen in most teleosts, in which the jaws are suspended from the
hyomandibula, the palatoquadrate is reduced to a quadrate, and new bones such as the
symplectic, preopercle, or metapterygoid may be involved.
suction feeding
food is drawn into mouth along with the water column
pharyngeal jaws
second pair of jaws in the throat in some fish
Metautostyly
jaw suspension found in amphibians, reptiles, and birds, in which the hyomandibula is
no longer associated with the jaws, but is modified into a columella or stapes, and the
jaw articulation is between the quadrate and articular.
Streptostyly
type of cranial kinesis found in most lizards, snakes, and birds, which have the ability to
pivot the quadrate bone, allowing a better angle for crushing food items.
Craniostyly
