ANSC 4402 REPRODUCTIVE PHYSIOLOGY EXAM QUESTIONS
AND ANSWERS A+ GRADED
What are the two primary functions of the ovary?
1. Produce eggs
2. Produce hormones
What are the hormones the ovary produces?
Estrogen
progesterone
relaxin
Main characteristics of the estrogen hormone
-secondary female sex characteristics
-development of the reproductive tract
-development of the mammary system
What hormone is in charge of Estrus behavior?
Estrogen
What are characteristics of the progesterone hormone?
-prepares the uterus for pregnancy and maintains the pregnancy
-prepares mammary glands for lactation
Main function of the Relaxin hormone?
At foaling, this hormone dilates the birth canal
What is Estrogen produced by?
Estrogen is produced by follicles
What is progesterone produced by?
Progesterone is produced by the corpus luteum
Definition of Estrous
Refers to the complete reproductive cycle of the mare
average time is 21 days
Definition of Estrus
when the mare is in heat and receptive to breeding
average time is about 6 days
Definition of Diestrus
the period between cycles when the mare is non-receptive
average time is about 15 days
Definition of anestrus
during the winter when the mare ceases to cycle
Definition of Transitional
phase in early spring when ovaries begin to be active
What type of estrous cycle do mares have?
mares are seasonally polyestrous
What does seasonally polyestrous mean?
-Mares cycle regularly but only during the spring and summer
-During the winter they are in anestrus
AND ANSWERS A+ GRADED
What are the two primary functions of the ovary?
1. Produce eggs
2. Produce hormones
What are the hormones the ovary produces?
Estrogen
progesterone
relaxin
Main characteristics of the estrogen hormone
-secondary female sex characteristics
-development of the reproductive tract
-development of the mammary system
What hormone is in charge of Estrus behavior?
Estrogen
What are characteristics of the progesterone hormone?
-prepares the uterus for pregnancy and maintains the pregnancy
-prepares mammary glands for lactation
Main function of the Relaxin hormone?
At foaling, this hormone dilates the birth canal
What is Estrogen produced by?
Estrogen is produced by follicles
What is progesterone produced by?
Progesterone is produced by the corpus luteum
Definition of Estrous
Refers to the complete reproductive cycle of the mare
average time is 21 days
Definition of Estrus
when the mare is in heat and receptive to breeding
average time is about 6 days
Definition of Diestrus
the period between cycles when the mare is non-receptive
average time is about 15 days
Definition of anestrus
during the winter when the mare ceases to cycle
Definition of Transitional
phase in early spring when ovaries begin to be active
What type of estrous cycle do mares have?
mares are seasonally polyestrous
What does seasonally polyestrous mean?
-Mares cycle regularly but only during the spring and summer
-During the winter they are in anestrus
