Chapter 7 (meat) Flashcards

Meat

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1
Q

4 types of beef with the sex

A
  1. steers (M)
  2. bulls (M)
  3. cow, heifers (F)
  4. calves (F,M)
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2
Q

when is pork slaughtered (age)

A

7-12 months

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3
Q

3 divisions of proteins in meat

A
  1. myofibrillar proteins (myosin and actin)
  2. structural protein (connective tissue)
  3. sarcoplasmic protein (blood)
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4
Q

composition of muscle fiber + composition

A

sarcomere, each of them made of 2 units:

  1. actin (thin)
  2. myosin (thick)
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5
Q

composition of connective tissue (2)

A

proteins + mucopolysaccharids

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6
Q

functions of connective tissue (3)

A
  1. provide structure + adhesiveness
  2. glue between muscle fibers (hold them together)
  3. surrunding all living cells
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7
Q

what are the adipose tissue (4)

A
  1. subcutanous fat (under skin)
  2. visceral fat (in abdominal cavity to protect organs)
  3. intermuscular (between muscles groups)
  4. intramuscular fat (fat within muscle fibers)
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8
Q

colour of young and old animals

A

young: white
old: yellow

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9
Q

what is marrow

A

soft, fatty material in the middle of large bones

  1. yellow in long bones
  2. red in spongy center of other bones
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10
Q

what make the colour changes

A
  1. oxygen

2. heat (denature myoglobin)

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11
Q

why adding nitrite by food industry (4)

A
  1. stop bacterial growth
  2. maintain bright pink-red colour of meat
  3. to slow development of rancid flavors
  4. to impart a sharp, piquant flavour
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12
Q

conclusion on a study about health consequence of red meat

A

increase 17& risk of developing bowel cancer

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13
Q

why red meats cause cancer (2)

A
  1. heme (broke down in N-nitroso compunds, damage intestinal cell lining, DNA replication is initiated to heal, so increase risk of error = mutations (risk of cancer)
  2. high temperature cooking: produce chemical that increased cancer risks
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14
Q

temperature where connective tissue dissolve in gelatin (colour = brown)

A

66 degree, 150 F

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15
Q

on what 2 aspects the grade is made

A
  1. quality (colour, fat distribution, surface texture, grain)
  2. yield (amount of lean meat compare to fat, bones and other inedible parts)
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16
Q

natural tenderizing that affects tender (7)

A

age (at slaughtered), heredity, species, aging, rigor mortis, marbling (fat content), cut

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17
Q

artificial tenderizing (5)

A

acids, enzymes, salts, mechanical, electrical stimulation

18
Q

electrical stimulation (a tenderizer) is for which species (2)

A

beef, lamb

19
Q

when happen the rigor mortis

A

6-24h after slaughtered

20
Q

what is temperature that enzymes are activated for tenderize the meat

A

55-76 degree

21
Q

what is the fraction of meat that is processed + 3 more popular

A

1/3, ham, sausage, bacon

22
Q

4 process methods

A

smoking, canning, drying, curing

23
Q

what determine the carving

A

the direction in which the muscle fibers run (grains is visible on the surface)
- cut accross grains

24
Q

which meat has to be refrigerate

A

fresh meat (3-5 days), ground meat (1-2 days)

25
Q

which meat must be freezing

A

most meat (3-12 months), ground beef (less than 3 months)

26
Q

characteristics of steers

A
  • Male
  • castrated while young
  • to gain weight quickly
27
Q

characteristics of bulls

A
  • male
  • uncastreted, mature
  • for processed meat + pet foods
28
Q

characteristics of heifers

A
  • have not borne a calf
  • used for meats
  • female
29
Q

characteristics of cows

A
  • female
  • borne 1 et + calves
  • less desirable tha heifers and steers
30
Q

characteristics of calves

A
  • male and female
  • 3-8 mos
  • baby beef= 8-12 mos
31
Q

animal maturity leads to what (about collagen) (2)

A
  • increased quantity of collagen

- increased covalent cross-link between collagen strands

32
Q

where do we find elastin

A

small amount in meat except for the cut of the neck and shoulder

33
Q

what do reticulin

A

support tissues (bone marrow, liver, lymphatic system)

34
Q

why do we have to remove elastin

A

affect tenderness, does not soften when heating

35
Q

advantage of the smoking method

A

cured meat is smoke for colour, aroma, flavor

36
Q

broiling and grilling (dry method) are based on what

A

meat thickness and distance from heat

37
Q

where is the marbling window

A

betwwen the birth and 250d

38
Q

nitrite + myoglobin with heat will create..

A

nitrosyl hemochrome (pink color)

39
Q

examples of game meats (5)

A

caribou, bison, elk, moose, deer

40
Q

inspection is mandatory for which species (5)

A

beef, lamb, pork, bison and poultry

41
Q

examples of lean or extra-lean cut

A

round roast
lean ground meat
sirloin steak

42
Q

dry heat preparation

A

roasting
grilling/broiling
pan-broiling
frying