Exam 1 Flashcards

(80 cards)

1
Q

Arrange the following geologic time periods from oldest to most recent: Pliocene, Oligocene, Paleocene, and Miocene

A

Paleocene, Oligocene, Miocene, Pliocene

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2
Q

List four trends documented in the evolution of the horse

A
  1. Reduction in # of toes
  2. Increase in size of cheek teeth
  3. Lengthening of face
  4. Increase in body size
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3
Q

List the following ancestors of today’s horse in order of their appearance on Earth: Pliohippus, Eohippus, Mesohippus, and Merychippus

A

Eohippus, Mesohippus, Merychippus, Pliohippus

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4
Q

Where and when was Prezwalski’s horse discovered?

A

It was discovered in 1879 in the remote valleys of Mongolia

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5
Q

Name three horses/horse like animals mentioned in mythology/legends

A

Pegasus: wild-winged horse
Unicorn: an animal with the legs of a buck, the tail of a lion, the head and body of a horse, and a single horn in the middle of its forehead
Centaur: half horse and half man

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6
Q

Name three horses made famous by the movies/TV

A
  • Flicka
  • Black Beauty
  • Mr. Ed
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7
Q

List the scientific name for the horse and three of its close relatives, such as the zebra or donkey

A

Equus Caballus: the true horse
Equus asinus: the true asses and donkeys of northern Africa
Equus burchelli: the ‘typical’ zebra
Equus hemionus: the desert adapted onagers of Asia and the Mideast

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8
Q

Name two factors that caused an increased demand for draft horses during the history of the United States

A

The rise in agricultural demands meet a need for horses that had both strength and speed. They also were needed for transportation of people and goods.

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9
Q

Name the zoological kingdom, phylum, class, order, family, genus, and species for the domestic (true) horse

A

Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Perissodactyla
Family: Equidae
Genus: Equus

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10
Q

Discuss how the development of the wheel influenced humans’ uses of the horse

A

Wheeled wagons were originally drawn by oxen, onagers, and donkey hydrides. The first draft horses rapidly gained popularity because of their speed. As a result of the domestication of the first draft horses, they were used for pulling chariots used in warfare and hunting.

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11
Q

How did horse racing start in the United States?

A

In colonial America, town rivalry was centered around horse racing. The first Kentucky derby was on May 17, 1875

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12
Q

Describe how the Romans influenced the use of horses

A

The Roman army changed from an infantry to a predominately cavalry-led force.

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13
Q

What 20th century events have changed how horses are used in this century?

A

New interest in public health, rising real estate values, and improvement in electric and gasoline powered alternatives to horsepower combined to mark the rapid decline of horses’ significance in the city.

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14
Q

Describe the events during the 19th century/early 20th century events that caused the number of horses to steadily increase in the United States.

A
  • The draft horse played a significant role in the growth of urban America, because the US was in transition from an agrarian to an urban society. As the cities grew, so did the need for mass transportation.
  • Commercial Uses:
    -Heavy horses hauled cargo unloaded at city terminals by railroads, steamships, and canal boats, and they distributed the goods produced in urban factories.
  • Fire protection:
    -Horses were required for urban fire departments; by 1906, NYC had 1,500 fire horses
    -Fire horses were almost always draft crosses selected for speed and strength
    -Transportation: horses were often used for a variety of transportation needs such as taking a family into town, or hauling goods to the market
  • Agriculture:
    -Horses became the leading farming work animal in the US
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15
Q

What effect did the Middle Ages have on the use of horses

A

With the increase in hostility between kingdoms and a rise in religious wars/barbaric invasion, the use of chariots decreased. As a result, horses started to develop new roles, particularly in agriculture. Additionally, hunting on horseback became a popular sport, especially in Norman France.

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16
Q

Discuss the concept that Spanish conquistadors reintroduced the horse to America

A
  • The Spanish colonization depended on horses, and the Spaniards recognized the tactical value of the animal.
  • Although the horse is believed to have been originated in North America, none survived prehistoric times except possibly those that emigrated to Asia over an ancient land bridge near modern-day Alaska.
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17
Q

Name the three foundation stallions of the Thoroughbred breed

A
  • Byerley Turk
  • Darley Arabian
  • Godolphin Arabian
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18
Q

Name five color breeds of horses

A
  • Bay: very common color, black points (legs, mane, tail)
  • Chestnut
  • Brown
  • Black
  • Dun
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19
Q

How long is the measurement of 1 hand?

A

A hand is equal to 4 inches; measured from the top of their withers to the ground

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20
Q

What is a breed?

A
  • Development of specific, desirable characteristics through selective breeding
  • Common ancestry that breed true to produce common characteristics such as function, conformation, and color
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21
Q

Light

A

12-17.2 hh, 900-1,400 lbs.,
Used primarily for riding, driving, showing, racing, or utility on a farm/ranch

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22
Q

Draft

A

14.2-17.2 hh, 1,400 lbs. or more
Used primarily for heavy work/pulling loads

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23
Q

Ponies

A

14.2 hh or less, 500-900 lbs.
Possess a distinct conformation on a reduced scale
Either draft, heavy harness, or saddle type

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24
Q

Warmblood

A

does not relate to horses with a certain blood temperature
Refers to the overall temperament of light-to-medium horse breeds
Fine bonded and suitable for riding
In some countries, they are distinguished as a horse having a strain of Arab breeding
Some groupings classify all light horses as warmbloods

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25
Coldblooded
horses that are heavy, solid, and strong with a calm temperament Best thought of as a way of describing draft horses
26
Uses for miniature donkeys and horses
Used for driving and as pets
27
Compare a mule to a horse
A mule is a cross between a horse and a donkey Mules lack hind leg chestnuts
28
Cob
A sturdy, placid horse
29
Hack
An enjoyable, good riding/driving horse, sometimes considered a small Thoroughbred/saddlebreed
30
Who are the top three global contributors to the horse market?
1. Europe: $133 billion 2. USA: $102 billion 3. Canada: $16 billion
31
Three major contributors to the horse industry
Science Show/Competitive industry Shamans
32
Shamans
Intuition Individuals with uncanny talent who work with and are very successful with horses
33
Scientists
Objective Experimental
34
Industry people
Anthropomorphism Trial and error
35
What parasite is the most damaging
Strongyles
36
Which horses are most affected by parasites
Young sucklings/weanlings
37
direct life cycle
requires no other organism except for the definitive, or final, host to complete its life cycle
38
Name six sanitation and management practices for reducing parasites
- Proper manure disposal - Pasture management - Do not feed off the ground - Provide a clean water supply - Removal of bot eggs - Regular deworming schedule
39
List three hosts of parasites
- Digestive tract - Stomach - Skin
40
Name five symptoms of any parasite infestation
- Weakness - Emaciation - Tucked-up flank - Potbelly - Rough coat - Diarrhea
41
Protozoans
Occur in the bloodstream and intestinal tract, transmitted by insect/spider or through ingestion in food/water
42
Roundworms (Nematodes)
by far the most serious and economically important of the worms that occur in horses, some damage the host by sucking blood; most have a direct life cycle
43
Tapeworms (Cestodes)
use pasture mites as intermediate hosts, host becomes infected by ingesting the mite contaminating the infective cysticercoid while grazing
44
Large Strongyles
most damaging of all the parasites that occur in horses; damage the artery’s lining, causing it to react and become very thickened, producing an aneurysm
45
Small Strongyles
don’t produce nearly as much damage as large strongyles, but can still cause colic
46
Pinworms
causes intense itching around the anus
47
Bot flies
fly larvae that are parasites in the stomach; remain in the lining of the mouth and cheeks, where they may cause severe ulcers
48
Biting flies
very annoying, bites often spook horses
49
Mosquitoes
can transmit Equine Encephalitis
50
Lice
occur in largest numbers in the winter when hair is long, spreads from animal to animal
51
Mites
contagious disease called mange/scabies, almost invisible to naked eye, spreads among stable mates
52
Ticks
not a huge problem in MT, feed on horses by sucking blood
53
What is the purpose of an anthelmintic?
They remove parasites from the intestinal tract
54
Ascarid lifecycle
- Eggs pass out in feces - Eggs live in environment for years - Warm weather & damp…egg turn into larvae - Foals eat larvae or infective eggs - Larvae penetrate gut into blood stream - Go to lungs - Migrate up trachea - Coughed up and swallowed back down to GI - Female lays 100,000 eggs in small intestine - Eggs pass out in feces
55
Strongyle lifecycle
- Eggs pass out in feces - Develop on the plants - First-stage larvae –2nd stage larvae- - In soil or feces - 3rd stage o Crawl up grass - Ingested by horse - Then carried by blood to colon and cecum - Migrate back through the walls into GI - Attach to mucosa
56
Bot lifecycle
- Adult lays eggs on hairs of horse - Fetlocks and knees - Throat - Inside nose - Single egg for each strike - Eggs hatch in 2-7 days - Larvae enter horse’s mouth - Molt and grow in mouth - Pass into stomach and intestine and attach to lining for several months - Release hold on GI lining and pass out in feces - Nose bots reattach to rectum before dropping to ground - Become pupae for 20-70 days - Emerge as adult fly - Adult fly does not eat - Looks like honey bee when flying around horses
57
Pinworm lifecycle
- Female worms pass out with feces - Deposit eggs on the way out or around anal region - Eggs are swallowed by horses in feed or water - Worms mature in large intestine
58
Why are young horses affected more by parasites than older horses?
Resistance/immunity is built up by the time a horse is 2-3 years old, so younger horses are more susceptible
59
Tobiano
most common color in paint horses Markings are typically rounded and extend onto the legs and across the back More white than dark
60
Overo
White patterns that typically have jagged, irregular edges and are arranged on a horizontal plane More dark than white
61
Frame overo
Solid color "frame" around the white markings Sharp irregular edges typical of the overo pattern
62
Calico
Irregular white patches scattered across their body in no particular arrangement
63
Sabino
high white markings on the legs, belly spots, and white on the face extending past the eyes
64
Splashed white
Look like they've been dipped in white paint
65
Medicine hat
nearly pure white with color only showing on the ears and poll area
66
Tovero
a mixture of tobiano and overo
67
Equine Infectious Anemia
-a viral disease affecting only members of the equine family - there is no vaccine or treatment for the disease -infection is often in-apparent and results in a lifelong carrier state if the horse survives the acute phase of infection
68
Pathobiology of EIA
- Virus that reproduces in the white blood cells; attacks erythrocytes - leads to anemia and lack of O2 to vital organs -Takes a toll on immune system and can cause Immunosuppression
69
What causes EIA
1. Viral mutation is relatively unknown, it originates in the DNA and is spread though viral RNA 2. Flies and horseflies spread disease
70
General symptoms of EIA
fever anemia pale mucous membranes enlarged lymph nodes and spleen petechial hemorrhages subcutaneous edema emaciation death
71
Acute EIA
-occurs within 1-2 weeks after exposure to virus -virus is active and multiplying but not showing any external symptoms -most horses do not survive the acute phase
72
Chronic EIA
-symptoms begin to show in episodes -will show flare ups of edema, hemorrhages, pale membranes, and enlarged lymph nodes -low hematocrit and blood platelet count
73
subclinical EIA
-will not show any symptoms but can transfer the disease -most common, low concentration in their system
74
EIA diagnosis
1. Agar-Gel-Immuno-Diffusion (AGID) Coggins test 2. Enzyme-linked immunosorbent assay (ELISA)
75
Agar-Gel-Immuno-Diffusion (AGID) Coggins test
gold standard, can have false negatives
76
Enzyme-linked immunosorbent assay (ELISA)
faster, can have false positives
77
Prognosis of EIA
- must be placed under quarantine within 24 hours - re-test is preformed to double check - seropositive horses must be permanently identified with a National Uniform Tag Code # followed by a letter A (hot brand, freeze mark, lip tattoo)
78
Prognosis of acute/chronic EIA
- Euthanasia - Final cause of death is usually due to immunedegegneration -Organ failture
79
EIA risk factors
-environments that have a influx of new horses -exposure to horses at shows, competitions, etc -swampy areas
80
EIA prevention
-use disposable needles -test horses annually and at time of purchase -make sure Coggins tests are required at all events -new horses should be quarantined for at least 30 days -practice good pasture management