Page |1
ANSC 4405 final Questions and Correct
Answers/ Latest Update / Already Graded
Optimal response to implants depends on sanitation and proper
implanting techniques. Improper sanitation and technique may cause
defects including:
Ans: crushed pellets and missing pellets
- improper placement or lost implants
- abscesses
The hormones currently approved for use in beef cattle implants
include:
Ans: Three naturally occurring hormones (estradiol,
progesterone and testosterone).
-Two synthetic hormones (zeranol and trenbolone acetate).
Before any implant is sold, the Food and Drug Administration must
approve it to be safe and effective. There is no such thing as "hormone-
free" beef or any other meat, as all meat products contain hormones.
Hormones are produced by all humans and animals for normal body
functioning and maturation. The respective concentration
(nanograms/day) of estrogen produced by pre-pubertal children and
the amount found in 3 oz of a steak from an implanted cattle are as
follows (respectively):
All rights reserved © 2025/ 2026 |
, Page |2
Ans: 40,000 and 1.9
Implant effects on growth curve and carcass characteristics can be
described as follows:
Ans: Extending the growth curve, in which, more days on feed
are required for animals to achieve similar carcass fat
composition of non-implanted steers (14 days for steers and 7
days for heifers).
Currently approved Synthetic β-Adrenergic Agonists (β-AA) for
finishing beef cattle in U.S. are described as follows
Ans: Ractopamine and Zilpaterol (not commercially available)
Steroidal implants and B-agonists function through the same cell
membrane receptors. Therefore, although safe for the animals and
consumers, it is not economically attractive to use both strategies
together, since no additional gain in carcass is expected by using such
combination. (t/f)
Ans: true
Ractopamine-HCl is a B-agonist FDA approved and on market in U.S. It
is commonly fed at 200-300 mg/head-daily for the last 28 to 42 days
prior harvesting. A 4-day withdraw period is required.
All rights reserved © 2025/ 2026 |
ANSC 4405 final Questions and Correct
Answers/ Latest Update / Already Graded
Optimal response to implants depends on sanitation and proper
implanting techniques. Improper sanitation and technique may cause
defects including:
Ans: crushed pellets and missing pellets
- improper placement or lost implants
- abscesses
The hormones currently approved for use in beef cattle implants
include:
Ans: Three naturally occurring hormones (estradiol,
progesterone and testosterone).
-Two synthetic hormones (zeranol and trenbolone acetate).
Before any implant is sold, the Food and Drug Administration must
approve it to be safe and effective. There is no such thing as "hormone-
free" beef or any other meat, as all meat products contain hormones.
Hormones are produced by all humans and animals for normal body
functioning and maturation. The respective concentration
(nanograms/day) of estrogen produced by pre-pubertal children and
the amount found in 3 oz of a steak from an implanted cattle are as
follows (respectively):
All rights reserved © 2025/ 2026 |
, Page |2
Ans: 40,000 and 1.9
Implant effects on growth curve and carcass characteristics can be
described as follows:
Ans: Extending the growth curve, in which, more days on feed
are required for animals to achieve similar carcass fat
composition of non-implanted steers (14 days for steers and 7
days for heifers).
Currently approved Synthetic β-Adrenergic Agonists (β-AA) for
finishing beef cattle in U.S. are described as follows
Ans: Ractopamine and Zilpaterol (not commercially available)
Steroidal implants and B-agonists function through the same cell
membrane receptors. Therefore, although safe for the animals and
consumers, it is not economically attractive to use both strategies
together, since no additional gain in carcass is expected by using such
combination. (t/f)
Ans: true
Ractopamine-HCl is a B-agonist FDA approved and on market in U.S. It
is commonly fed at 200-300 mg/head-daily for the last 28 to 42 days
prior harvesting. A 4-day withdraw period is required.
All rights reserved © 2025/ 2026 |
