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Lactation in Dairy Cattle

Total questions: 48

Worksheet time: 25mins

Name
Class
Date
1.

Milk secreted for up to few days after parturition and characterized by high protein and antibody content. Known as first milk.

a)

Colostrum

b)

Milk

c)

Artificial Insemination

d)

Reproduction

2.
The mammary system is responsible for milk production in dairy cows.
a)
True
b)
False
3.
The “first” milk produced by a dairy cow, that is rich in nutrients is called____________.
a)
Fresh milk
b)
Dry milk
c)
Colostrum
d)
Good milk
4.
The ______ is composed of the lumen, epithelial, and myoepithelial cells.
a)
Alveoli
b)
Teat Cistern
c)
Teat Canal
d)
Ducts
5.
The ________ are cells that produce milk by taking nutrients from the blood stream.
a)
Lumen
b)
Myoepithelial cells
c)
Epithelial Cells
d)
Alveoli
6.
The ______ are responsible for transporting milk from the alveoli to the gland cistern.
a)
Teat Canal
b)
Lumen
c)
Alveoli
d)
Ducts
7.

The _________ are clusters of 150-220 alveoli.

a)

Lumen

b)

Lobes (aka Lobules)

c)

epithelial cells

d)

Udder

8.
The _______ is responsible for collecting the majority of milk produced in the mammary quarter.  This holds up to 500mL of milk.
a)
Teat Canal
b)
Gland Cistern
c)
Teat Cistern
d)
Lumen
9.
The last place that milk goes through before leaving the body is the ___________.
a)
Teat Canal
b)
Teat Cistern
c)
Udder
d)
Gland Cistern
10.
The _______ is also responsible for collecting milk, but only holds 15-40 mL.
a)
Teat Canal
b)
Gland Cistern
c)
Teat Cistern
d)
Lumen
11.

The ______ collects the milk made in the epithelial cells of the alveoli.

a)

Alveoli

b)

Teat Cistern

c)

Gland Cistern

d)

Lumen

12.
The _____________ is the main source of support for the udder.  It runs head to tail on the cow and divides the udder into left and right halves.  Attaches the udder to the abdominal wall.
a)
Lateral Suspensory Support
b)

Lateral Suspensory Ligament

c)
Median Suspensory Support
d)
Median Suspensory Ligament
13.
The __________________ are responsible for acting like a sling to support the udder from side to side.
a)
Lateral Suspensory Support
b)
Lateral Suspensory Ligament
c)
Median Suspensory Support
d)
Median Suspensory LIgament
14.
A cow needs to circulate ____ to _____ liters of blood to make one liter of milk.
a)
100-200
b)
200-300
c)
300-400
d)
400-500
15.
How does a calf get the udder to release milk?
a)
Bawls 
b)
Head butts it
c)
Chews on it
16.
Which of these udder parts produce the milk?
a)
Teat
b)
Gland Cistern 
c)
Aveoli
d)
Quarter
17.
Which of these is not a dairy product?
a)
Butter
b)
Cream
c)
Margarine 
d)
powdered Milk
18.
What hormone causes milk letdown?
a)
Estrogen
b)
Oxytocin 
c)
Testosterone
d)
Serotonin 
19.
What is the number one dairy breed?
a)
Jersey
b)
Brown Swiss
c)
Holstein
d)
Ayshire
20.
What breed has the highest butter fat % in their milk?
a)
Holstein
b)
Guernsey 
c)
Jersey
d)
Shorthorn
21.
What part of the udder does the milk exit out of?
a)
Cistern
b)
aveoli
c)
teat
22.
Which breed has the highest milk production?
a)
Brown Swiss
b)
Holstein
c)
Jersey
d)
Shorthorn
23.
What is a cow showing signs of pregnancy?
a)
Heifer
b)
Cow
c)
Springer
24.
The span of time that a cow is giving milk is known as?
a)
Milk production
b)
Lactation
c)
Discrimination
25.

How long does it take for milk let down to start from the stimulation?

a)

Instantly

b)

20-30 Seconds

c)

60-90 seconds

d)

5 Minutes

26.
How long is a dairy cows gestation period?
a)
3 months 3 weeks 3 days
b)
6 months
c)
9 months
d)
11 months
27.
Which breed  is known for its golden milk color?
a)
Holsteins
b)
Guernsey
c)
Brown Swiss
d)
Jersey
28.

The process for making eggs in a female...

a)

Spermatogenesis

b)

Ovulation

c)

Uterine Horns

d)

Oogenesis

29.

What hormone starts the development of the udder prior to the birth of the calf?

a)

Epinephrine

b)

Oxytocin

c)

Prolactin

d)

Steroids

30.

What hormone relaxes the sphincter muscle at the top of the teat?

a)

Epinephrine

b)

Prolactin

c)

Oxytocin

d)

Bovine Somatrophin (BST)

31.

The type and quality of the food matters for quality of milk production.

a)

True

b)

False

32.

In order to maximize milk production, the farmer must provide...(Select all that apply)

a)

Calm

b)

Consistent

c)

Clean

d)

Chaotic

33.

The type of cells in the alveoli that are

a)

epitheliel

b)

myoptic

34.

Let down means

a)

Cow lets the udder down

b)

The milk is released for milking

c)

Milk is let into the gland cistern

d)

Milk leaves the alveoli and enters the duct

35.

The way the let down process starts is...

a)

The cow is fed.

b)

Calf butts head on udder.

c)

Farmer washes the udder.

d)

Happens at the same time each day.

36.

What is always the first step in the milking process?

a)

Dry teats

b)

Strip milk from udder and check for mastitis

c)

Draw milk with claw.

d)

Dip teats in iodine

37.
What is always the last step in the milking process? 
a)
Dry teats
b)
Wash and disinfect teats
c)
Draw milk with claw.
d)
Dip teats in iodine
38.
What is the word that matches the following sentence. Medication that kills or slows the growth of harmful bacteria.
a)
Antibiotic
b)
Dystocia
c)
Heifer
d)
Dry Cow
39.
What is the word that matches the following sentence. A cow that is not producing milk, 60 days before giving birth.
a)
Antibiotic
b)
Dystocia
c)
Heifer
d)
Dry Cow
40.
What is the word that matches the following sentence. Female dairy animals that are raised with the intent of eventually replacing the cows currently in the milking herd.
a)
Homogenization
b)
Mastitis 
c)
Replacement Heifers
d)
Pasteurization
41.
Initiated by hormones , milk is secreted from the mammary glands...
a)
Gestation
b)
Lactation
c)
Parturition
d)
Mastitis 
42.

Period of time when a female is giving birth.

a)

Parturition

b)

Meiosos

c)

Lactation

d)

Pregnancy State

43.
Parturition in Cattle is called
a)
Calving
b)
Lambing
c)
 Eweing
d)
Kidding
44.
When the milk is heated up to remove bacteria and make it safe to drink, it is called _________
a)
Pasteurization
b)
Homogenization
c)
Clarification
d)
Fortification
45.

What is the most important organ on a dairy cow? __________________ (it can hold 25-50 pounds of milk)

a)

Stomach

b)

Muscles

c)

Milk

d)

Udder

46.

An average Dairy cow produces 20,000 pounds of milk a year. How many pounds of milk will the average cow produce in a day?

a)

45

b)

55

c)

65

d)

70

47.

What hormone starts the development of the udder prior to the birth of the calf?

a)

Epinephrine

b)

Oxytocin

c)

Prolactin

d)

Steroids

48.

This hormone inhibits milk production and is caused by stress and chaos in the milking parlor.

a)

Oxytocin

b)

Prolactin

c)

Epinephrine

d)

Testosterone