puberty Flashcards
what is puberty
period during which there is the ability to produce gametes and the capacity to engage in sexual activity
reaching of puberty in females is determined by
- age of first ovulation
- age of first ovulation
- age at which female can support pregnancy without difficulties
- psychological maturation
reaching of puberty in males
behavioral traits, age at first ejaculation, age when sperm in present in ejaculate/urine, age at which sperm number reach threshold
typical age of puberty in bovine males
9-12 months
sexual differentiation happens through what process
defeminization of the brain, where testosterone enters the brain and passes brain barrier to defeminize
before puberty the anterior pituitary and gonads can secrete what hormones
gonadotropins and steroid hormones
critical component for attainment of puberty
development or maturation of hypothalamus
factors that regulate development of repro axis
diet, BCS, environment or social cues
low levels of GnRH during infantile period leads to
low concentration of LH and FSH
estradiol sends what type of feedback to tonic center
negative feedback
leptin is produced by?
What does it regulate
adipocytes- fat cells
regulated feeding behavior and body weight
sensitivity of hypothalamic neurons change with
age and growth leading to relate of GnRH
sensitivity of hypothalamic neurons change with
age and growth leading to relate of GnRH
what do the neurons in the hypothalamus monitor
blood levels of glucose and fatty acids
low levels of E2 inhibit what secretion in hypothalamus, and how can it be changed to secrete that hormone?
low levels of E2 inhibit GnRH secretion due to it binding with receptors in the hypothalamus
