What event coincides with the transition from the proliferative phase?
What event coincides with the transition from the proliferative phase to the secretory phase? Stratum functionalis is shed. Enrichment of the blood supply and glandular secretions prepare for reception of an embryo.
What ovarian structure forms at the beginning of the secretory phase encouraging its progress and then degenerates just before menses quizlet?
What ovarian structure forms at the beginning of the secretory phase, encouraging its progress, and then degenerates just before menses? The corpus luteum forms at the beginning of the secretory phase and produces hormones that support the uterus. When it degenerates about 12 days later, the uterus enters menses.
Which of the following cells is released during ovulation?
Following a surge of luteinizing hormone (LH), an oocyte (immature egg cell) will be released into the uterine tube, where it will then be available to be fertilized by a male’s sperm within 12 hours. Ovulation marks the end of the follicular phase of the ovarian cycle and the start of the luteal phase.
Which hormone is the necessary trigger for ovulation?
Luteinizing hormone (LH), the other reproductive pituitary hormone, aids in egg maturation and provides the hormonal trigger to cause ovulation and the release of eggs from the ovary.
What maintains the constancy of the chromosome number from one generation to the next?
What occurs during the secretory phase of the uterine cycle?
The secretory phase of the uterine cycle begins at ovulation. In this phase, the glands become even more complexly coiled and the endometrial lining reaches its maximal thickness, whereas the stratum basalis and myometrium remain relatively unchanged. Note the saw-toothed appearance of the glands.
Which of the following shows the correct pathway for sperm cells as they leave the testes?
Sperm cells pass through a series of ducts to reach the outside of the body. After they leave the testes, the sperm passes through the epididymis, ductus deferens, ejaculatory duct, and urethra.
What structure is the target for gonadotropin stimulation occurring during the events that lead to ovulation quizlet?
What structure is the target for gonadotropin stimulation occurring during the events that lead to ovulation? Gonadotropins (FSH and LH) released by the anterior pituitary stimulate vesicular follicles to grow, mature, and secrete sex hormones.
Why does only one egg rather than four eggs develop during oogenesis given that spermatogenesis results in four sperm formed from one stem cell Why does only one egg rather than four eggs develop during oogenesis given?
Why does only one egg, rather than four eggs, develop during oogenesis, given that spermatogenesis results in four sperm formed from one stem cell? … The unequal cytoplasmic division that results in one egg and three polar bodies ensures that a fertilized egg has ample nutrients for its journey to the uterus.
What part of the female system is the usual site of fertilization?
What is a follicle in ovary?
Normally, ovarian follicles contain egg cells, which are released during ovulation. In polycystic ovary syndrome, abnormal hormone levels prevent follicles from growing and maturing to release egg cells. Instead, these immature follicles accumulate in the ovaries. Affected women can have 12 or more of these follicles.
Which layer of the uterus is made of smooth muscle?
Which hormone is responsible for menstrual cycle?
The first day of menses is identified as cycle day one. Estrogen is at a low point. Therefore, the pituitary secretes FSH and LH, a process which actually begins before the onset of your menses. These hormones in turn stimulate the growth of several ovarian follicles, each containing one egg.
What hormone is released on day 5?
The follicular phase starts on the first day of menstruation and ends with ovulation. Prompted by the hypothalamus, the pituitary gland releases follicle stimulating hormone (FSH). This hormone stimulates the ovary to produce around five to 20 follicles (tiny nodules or cysts), which bead on the surface.