ANS 2- 4.01

Accurate heat detection in cows is important because the average length of heat or estrus is about:

• 1 hour

• 16 to 18 hours

• 6 days

• 10 days

The best indication that a cow is in standing heat and is ready to be bred is:

• allowing other cows to mount.

• a marked increase in feed intake.

• an increase in milk production.

• a tendency to separate from other cows.

If no sperm are present during ovulation, prostaglandin stops the production of which hormone?

• Estrogen

• Progesterone

• Follicle-stimulating hormone

• Luteinizing hormone

Which hormone is primarily responsible for a cow displaying signs of heat?

• Estrogen

• Progesterone

• Follicle-stimulating hormone

• Luteinizing hormone

If left in the mother's body after the baby animal is born, the placenta and other membranes will make the mother sick. This tissue, generally expelled during the birthing process, is also referred to as the:

• afterbirth

• breach birth

• umbilical cord

• uterus

Which hormone is primarily responsible for maintaining pregnancy in an animal?

• Luteinizing hormone

• Progesterone

• Follicle-stimulating hormone

• Estrogen

What stage of parturition involves the actual birth of the fetus?

• cleaning

• expulsion

• preparatory

• retention

Ovulation is necessary for the animal to:

• become pregnant

• digest roughages

• eat food

• resist diseases

The average length of the estrus cycle for both cattle and swine is:

• 1 day

• 21 days

• 28 days

• 114 days

What structure located on an ovary is the site where ova develop?

• corpus luteum

• infundibulum

• follicle

• uterus