During which phase of the uterine cycle will stratum Functionalis develop with?
During the proliferative phase, a new stratum functionalis develops with endometrial glands and spiral arteries and veins.
What is the function of the stratum Functionalis?
This inner functional layer provides the proper site of implantation for the fertilized egg, and—should fertilization not occur—it is only the stratum functionalis layer of the endometrium that sheds during menstruation.
What regenerates the stratum Functionalis?
The human endometrium is stratified into two zones: the stratum functionalis and the stratum basalis. The stratum functionalis is shed during menstruation and regenerates from the underlying stratum basalis during the proliferative period.
What causes the stratum Functionalis to degenerate?
Decreased levels of LH and progesterone result in the menstrual phase, or menses. During menses (shedding of the uterine lining, which occurs if the egg is not fertilised) the spiral arterioles in the stratum functionalis layer contract, resulting in ischaemia, and degeneration of the functionalis layer.
During which phase of the menstrual cycle will stratum Functionalis develop with endometrial glands and spiral arteries and veins?
The proliferative phase is characterized by robust growth of the epithelial cells in the stratum functionalis and the formation of coiled and densely packed glands. This changes in this phase are driven by estrogen.
What causes the stratum Functionalis to sloughed off?
During the menstrual cycle, the stratum functionalis expands and vascularizes and is subsequently sloughed off during the process of menstruation, whereas the stratum basalis remains relatively constant.
What hormone stimulates growth of the stratum Granulosum?
The stratum granulosum remains avascular until after ovulation. Follicle stimulating hormone (FSH) promotes the growth of a group of follicles resulting in an increase in the production of estradiol and inhibin by the granulosa cells.
Which hormones influence the growth of the uterus?
The Uterus This preparation occurs under the influence of estrogen and progesterone from the ovary. If no pregnancy develops, the endometrium is shed as a menstrual period, about fourteen days after ovulation.
What stimulates endometrial growth?
In both species, estrogens produced from the developing follicles stimulate endometrial growth, and progesterone is responsible for converting the estrogen-primed endometrium into a receptive state.
Which development after menstruation causes the endometrium to start building up?
In a typical menstrual cycle, estrogen made by the maturing ovarian follicle causes the glands to grow and the endometrium to thicken (partly through an increased blood supply). This thickening of the uterine lining is called the proliferative phase of the menstrual cycle.
Which of the following phase of menstrual cycle shows maximum proliferation of endometrium?
The follicular phase
The follicular phase of the female menstrual cycle includes the maturation of ovarian follicles to prepare one of them for release during ovulation. During the same period, there are concurrent changes in the endometrium, which is why the follicular phase is also known as the proliferative phase.
What is the role of Lamellated granules in the stratum granulosum?
What is the role of lamellated granules in the stratum granulosum? They police the outer body surface using receptor-mediated endocytosis to take up foreign proteins that have invaded the epidermis. They secrete a waterproofing glycolipid into the extracellular space that slows water loss across the epidermis.
What does vitamin D do in the epidermis?
Numerous functions of the skin are regulated by vitamin D and/or its receptor. These include inhibition of proliferation, stimulation of differentiation including formation of the permeability barrier, promotion of innate immunity, regulation of the hair follicle cycle, and suppression of tumor formation.
Which hormone is responsible for growth of uterus and skeleton?
Estrogens. The principal role of estrogens in human pregnancy is to stimulate uterine growth and increase uterine blood flow.
Which hormone causes FSH and LH to be released?
Gonadotropin-releasing hormone (GnRH)
FSH and LH are known as gonadotropins. They are released by the anterior pituitary. Gonadotropin-releasing hormone (GnRH) secreted by the hypothalamus stimulates the release of gonadotropins from the pituitary gland.
Which hormone stimulates the endometrium?
Estradiol stimulates the endometrium to proliferate. Estradiol and progesterone cause the endometrium to become differentiated to a secretory epithelium.
What are the 4 phases of the endometrial cycle?
The four phases of the menstrual cycle are menstruation, the follicular phase, ovulation and the luteal phase.
How does the endometrium change throughout the menstrual cycle?
This is called the proliferative phase because the endometrium (the lining of the uterus) becomes thicker. The endometrium is thinnest during the period, and thickens throughout this phase until ovulation occurs (9). The uterus does this to create a place where a potential fertilized egg can implant and grow (10).
What happens in the stratum granulosum layer?
The granule cell layer (stratum granulosum) is the next layer (3-5 layers of cells). As the cells move up into this layer, they start to lose their nuclei and cytoplasmic organelles, and turn into the keratinised squames of the next layer. The granules contain a lipid rich secretion, which acts as a water sealant.
What is the function of the stratum functionalis?
It is the stratum functionalis that grows and thickens in response to increased levels of estrogen and progesterone. In the luteal phase of the menstrual cycle, special branches off of the uterine artery called spiral arteries supply the thickened stratum functionalis.
What happens to the stratum functionalis of the endometrium?
Recall that progesterone concentrations decline as a result of the degradation of the corpus luteum, marking the end of the luteal phase. This decline in progesterone triggers the shedding of the stratum functionalis of the endometrium.
What happened to structural functionalism?
The preeminence of structural functionalism came to an end in the 1960s, however, with new challenges to the functionalist notion that a society’s survival depended on institutional practices.
What is structural functional analysis according to Parsons?
Along with Robert K. Mertonand others, Parsons classified such structures on the basis of their functions. This approach, called structural-functional analysis (and also known as systems theory), was applied so broadly that some sociologists took it to be synonymous with the scientific study of social organization.