29 Questions
What is the role of leptin in relation to nutritional status?
Stimulates Neuropeptide Y neurons
How do blood fatty acids relate to GnRH neurons stimulation?
Directly stimulate GnRH neurons
Which environmental factors influence pubertal onset?
Optic and olfactory system
What does the secretion of leptin by adipocytes indicate?
High fat levels
How does blood glucose concentration relate to metabolic status?
Is an indicator of metabolic status
What role do blood fatty acids play as an indicator of nutritional status?
Indirectly stimulate GnRH neurons
What hormone dominates the secretory phase of the menstrual cycle?
Progesterone
Which phase of the menstrual cycle is characterized by sloughing of the endometrium if pregnancy does not occur?
Menses phase
What is the primary difference between the estrous cycle and the menstrual cycle?
Presence of sexual receptivity
What hormone dominates the follicular phase of the estrous cycle?
Estrogen
Which factor can cause anestrus in animals?
Pregnancy
What is the primary function of Progesterone secreted by the Corpus Luteum?
Reduce motility/contractions in the myometrium
How does Progesterone affect the number of GnRH receptors on the Anterior Pituitary?
Decreases the number of GnRH receptors
What effect does Progesterone have on GnRH, LH, and FSH secretion?
Suppresses their secretion
Which organ does Progesterone primarily target besides the uterus?
Mammary gland
What is the key role of Progesterone in the endometrium?
Provide calming conditions for conceptus attachment
How does Insufficient luteal function potentially impact reproduction in mammals?
Contributes to reproductive failure
What happens when mating does not occur in a queen who is an induced ovulator?
Ovulation occurs, but CL is not formed
What causes a marked elevation in progesterone after ovulation in the queen?
Formation of corpora lutea
Why does lactational anestrus not occur in cats?
They exhibit regular estrous cycles during lactation
What is the primary cause of True anestrus in females?
Insufficient hormonal stimuli
What is the role of progesterone upon GnRH secretion?
It suppresses GnRH secretion
Which of the following factors can contribute to Anestrus in females?
Pregnancy, lactation, and stress
How does PGF2α contribute to luteolysis?
By inducing death of large luteal cells
What are the two primary factors that influence the onset of the breeding season?
Temperature and melatonin production
What is the outcome of uterectomy in women on ovarian cyclicity?
Has no influence on ovarian cyclicity
How does administration of progesterone impact the estrous cycle?
Suppresses estrus and ovulation
Which event characterizes luteolysis in women as an intra-ovarian event?
Loss of large luteal cells during the process
What is the main impact of PGF2α on blood flow to the corpus luteum?
Reduces blood flow by causing arteriole contraction
Explore the connection between the plane of nutrition, growth, average daily gains, and the onset of puberty in dairy heifers. This material is intended for classroom discussion within the Benguet State University College of Veterinary Medicine.
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