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119 Cards in this Set

  • Front
  • Back

What domain are vertebrates in?

Eukaryota

Three characteristics of the kingdom animalia

heterotrophic, multicellular, and lack cell walls

4 characteristics of chordata

notochord, pharyngeal slits, dorsal hollow nerve cord, and post-anal tail

3 subphyla of chordata

urochordata, cephalochordata, and vertebrata

what does "urochordata" mean?

tail chord

3 traits of urochordata

marine filter-feeders, adult is sessile, and larva is mobile

common name of urochordata

tunicate/sea squirt

what does"cephalochordata" mean?

head chord

What is the common name of cephalochordata?

amphioxus/lancelet

2 characteristics of cephalochordata

marine filter feeders and semi-sessile

3 ways cephalochordates are similar to vertebrates

closed cardiovascular system with muscular heart, similar muscular proteins, and similar organization of cranial nerves

2 differences between cephalochordates and vertebrates

Cephalochordates have protonephridia the filters coelomic fluid, but vertebrates have nephrons that filter blood. Cephalochordates have alternate spinal nerves, but vertebrates have successive pairs

3 characteristics of vertebrates?

cranium/braincase, backbone (either notochord or vertebral column), and paired appendages/limb girdles

14 vertebrate groups

Myxini, Cephalaspidomorphi, Chondrichthyes, Actinopterygii, Sarcopterygii, Caudata, Caecilians, Anura, Turtles, Crocodilia, Birds, Tautara, Squamates, and Mammals

Approximate number of total vertebrate species

57,000

8 anatomical terms

anterior (towards head), posterior (towards tail), distal (towards end of appendage), proximal (towards body concerning an appendage), dorsal (back), ventral (belly), medial (towards mid-line), and lateral (away from mid-line)

Describe the body form of a fish

Made of a head, trunk, and tail. Fusiform and hydrodynamic



What type of locomotion is the fusiform body shape associated with?

aquatic

Describe the body form of a terrestrial vertebrate

movable head of constricted, elongated neck. Caudal region constricted and used for balance and communication rather than locomotion. larger, more pronounced limbs

Type of locomotion that frees forelimbs for functions other than terrestrial locomotion. Walking on two legs

bipedal locomotion

Type of locomotion that uses strong hind limbs with large bones and associated musculature. Jumping locomotion

Saltatory locomotion

Type of locomotion associated with short, rigid bodies. Flying or gliding

Aerial locomotion

Some functions of vertebrate integument (10)

Protection, temperature regulation, calcium storage, vitamin D synthesis, water/electrolyte balance, excretion, gas exchange, microbial defense, sensory, and production of pheromones

2 layers of vertebrate integument

epidermis and dermis

Describe the two layers of fish integument

Epidermis: a thin layer of living cells that secretes mucus. Dermis: Bony dermal scales

2 functions of terrestrial vertebrate epidermis

protection from dessication and protection from abrasion

2 layers of terrestrial vertebrate epidermis

Stratum germinativum and stratum corneum

Describe amphibian integument

thin, moist, and highly vascularized

What kind of scales do reptiles have?

epidermal scales

Describe bird integument

thin, covered in either scales or feathers

Describe mammal integument

Thick dermis and covered in hair/fur

4 integument accessory structures

claws, nails, hooves, and beaks

What is a vertebral column?

A sequence of individual vertebra

3 parts of a vertebra

centrum, neural arch, and hemal arch (in fish only)

What are the functions of the neural and hemal arches?

Neural arch: protects spinal cord. Hemal arch: protects the large blood vessel in fish

2 vertebral column regions in fish

trunk and caudal

5 vertebral column regions in tetrapods

cervical, thoracic, lumbar, sacral, and caudal

Function of the skull

supports and protects the brain and sensory organs

what three groups have a chondrocranium?

Myxini, Cephalaspidomorphi, and chondrichthyes

How many gill arches did primitive vertebrates have?

7

How did jaws evolve?

elements of the first anterior gill arches evolved into jaws and became encased in dermal bone

What kind of dentition do amphibians, reptiles, and some mammals have?

homodont dentition

Define homodont dentition

simple, conical, and numerous teeth that evolved for grasping/holding food

3 places that fish have teeth

palate, tongue, and pharynx

Define heterodont dentition

teeth adapted for different function

What type of dentition do most mammals have?

heterodont

4 types of heterodont teeth

incisors, canines, premolars, and molars

In what group of animals are teeth completely lost?

Baleen Whales

In what two groups of animals have teeth been replaced by beaks?

Turtles and birds

What did tetrapod appendages evolve from?

the fins of lobe-finned fishes

3 elements of tetrapod appendages

proximal, intermediate, and terminal

2 characteristics and 2 functions of tetrapod appendages

characteristics: robust bones and very muscular. Functions: support and move the body

Why are posterior limb larger in cursorial animals?

to provide rapid acceleration and support more body weight

Describe the digits of cursorial animals

reduced

What is a homologous structure?

structures that developed from the same embryonic tissues in two or more organisms sharing a common ancestor

What is an analogous structure?

structures that resemble one another superficially and are uses for the same purpose, but may or may not arise from the same evolutionary structure

What is convergent evolution?

when organisms that are not closely related become similar due to independent adaptations to similar enviroments

What type of muscular is prominent in fish?

axial

what are the axial muscles of fish called?

myomeres

describe the axial and appendicular musculature of tetrapods

the axial musculature is reduced and the appendicular musculature is better developed

define "gas exchange"

the diffusion of oxygen from water or air into the bloodstream, and the diffusion of carbon dioxide from the bloodstream into water or air

What are the plate-like structures in fish gills called?

lamellar structures

Describe the two ways air breathing animals draw air into the body

Amphibians: force air into the lungs. Reptiles, birds, and mammals: reduce the atmospheric pressure of the lungs to pull air in

3 animals/groups that use integumentary gas exchange

amphibians, bats, and turtles

What structure in fish is homologous to lungs?

swim bladder

what are the two possible functions of a swim bladder?

buoyancy control and to supplement gill breathing

What system in vertebrates is strongly tied to respiration?

circulatory system

5 main components of the circulatory system

heart, arteries, capillaries, veins, and blood

What are the two components of blood?

cells (erythrocytes and leukocytes) and plasma

6 things blood can transport

oxygen, carbon dioxide, metabolic products, nutrients, hormones, and antibodies

What does endothermic mean?

can regulate body temperature

what does homeothermic mean?

maintains a constant body temperature

describe the circulatory system of a fish

2 chambered heart, single circuit

describe the circulatory system of lung breathers

3 or 4 chambered heart and increasingly divided circuits

Why are increasingly divided circuits important to lung breather circulatory systems?

increases the concentration gradient of oxygen and carbon dioxide so gas exchange becomes more efficient

7 components of the digestive system

mouth, pharynx, esophagus, stomach, small intestine, large intestine, and anus/cloaca

Contrast the digestive systems of fish to that of terrestrial vertebrates

Fish: short, straight tube through the body. Terrestrial vertebrates: longer, more coiled tube. digestive organs move posterior to accommodate increasingly large lungs

What do aquatic vs terrestrial digestive systems use for lubrication?

Aquatic: water. Terrestrial: mucus and saliva

3 digestive specializations

gizzards in bird, chambered stomachs in ruminants, and spiral valves in sharks

4 parts of the nervous system (3 are brain)

forebrain, midbrain, hindbrain, and spinal cord

8 components of the forebrain

olfactory bulb, cerebrum, optic lobe, parietal eye, pineal body, thalamus, hypothalamus, and pituitary

In what groups is the forebrain best developed and why?

hagfish, lampreys, and cartilaginous fish because they locate food using olfactory cues

In what groups is the midbrain best developed and why?

bony fish and amphibians because of the importance of vision in obtaining food

What are the 3 parts of the hindbrain?

cerebellum, medulla, and pons

What is the purpose of the cerebellum?

muscular control and coordination

In what group is the hindbrain best developed and why?

birds because of the need for coordination in flight

contrast the nasal region of non-sarcopterygian fishes to all other vertebrates

non-sarcopterygian fishes: paired, blind ended pits called nasal sacs. Other vertebrates: the nasal region is connected to the oral cavity

In what types of vertebrates is vision lost or reduced?

cave dwelling or subterranean species

4 groups that have a parietal eye

hagfish, lamprey, tuatara, and some squamates

What kind of hearing receptors do fish have?

neuromasts located in the lateral line

In what type of vertebrates is hearing best developed?

noisy

4 functions of hearing

warning, mate attraction, location of food, and social contact

2 animals that can hear infrasounds

elephants and manatees

animal that can hear ultrasounds

bats

what is the purpose of the endocrine system?

to control chemicals in the body

What glands secrete hormones

endocrine glands

3 purposes of the kidney

nitrogenous waste removal, excess salt removal, and water balance

2 adaptations of freshwater fish that allow them to survive in water with lower concentration than their body fluids

large nephrons and very dilute urine

Adaptation of bony marine fish and cartilaginous marine fish to help them survive in water with salt concentrations higher than their own body fluids

bony fish: small nephrons and can excrete salt through gills. Cartilaginous fish: retain urea in body fluids, raising their osmotic pressure

2 adaptations that help terrestrial vertebrates retain water

small filtering components of nephrons and large tubules for reabsortion

3 types of kidneys

pronephros, opisthonephros, and metanephros

3 characteristics of pronephros

developmental stage in all vertebrates, functional in larval fish and amphibians, and the adult kidney in hagfish

What are opisthonephros?

the functional kidneys of adult lampreys, fishes, and amphibians

What are metanephros?

the functional kidneys of birds and mammals

What does dioecious mean?

Species that have a male and female

Monomorphic vs dimorphic

monomorphic: males and females are identical. Dimorphic: males and females are distinct

What is parthenogenesis?

When eggs develop without fertilization

4 types of species recognition

sight, sound, smell, and touch

3 factors that influence reproductive output

endotherms vs ectotherms, environmental factors, and method of fertilization

Characteristics of external fertilization

lots of gametes produced, and a low chance of fertilization and survival for each individual offspring

Characteristics of internal fertilization

fewer gametes produced, and a much higher chance of fertilization and survival

7 components of an amniotic egg

shell, chorion, allantios, yolk sac, amnion, amnionic fluid, and embryo

What the the purpose of the amnion?

protection

What is delayed fertilization, and what 3 animals can do it?

Females can store viable sperm for long periods of time. bats, snakes, and turtles

4 characteristics of R strategists

High reproductive rates, small animals, large number of offspring, and reproduce at an early age


3 characteristics of K strategists

Low reproductive rates, takes longer to reach reproductive age, and larger animals

define precocial

Well developed at birth or hatching, very independent



define altricial

Underdeveloped at birth or hatching, very dependent on parental care

3 modes of reproduction

oviparous (egg-laying), viviparous (live young), and ovoviviparity (retain eggs in body)