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3 years ago

Which of the following is NOT a phase in the menstrual cycle?

Biology

2 answers:

disa [49]3 years ago

3 0

I believe the correct answer is gastrulation.

<h2>Explanation:</h2>

The menstrual cycle is divided into the follicular phase, the menstrual phase, ovulation phase and the luteal phase. The Ovulation phase is a phase between the menstrual cycle just before menstruation starts. Gastrulation on the other hand is a phase in embryogenesis after fertilization has occurred.

<h2>Further Explanation:</h2><h3>1. Ovulation phase:</h3>

This is a phase in between the menstrual cycle and is triggered by a hormone produced by the anterior pituitary gland and is called the Luteinizing hormone. The phase is when the egg has matured from the graafian follicle after it bursts. This egg will travel into the fallopian tube by the help of special structures called fimbriae hoping to be fertilized. If fertilized, the egg will attach to the uterus. If not, it is removed as menstrual blood during menstruation. In this stage, the basal body temperature of the lady increases and she will have more "feelings" for sexual intercourse.

<h3>2. Luteal phase:</h3>

It is triggered by the hormone Luteinizing Hormone (LH) that is released by the anterior pituitary gland. After the graafian follicle releases the ovum, it (graafian follicle) matures into the corpus luteum that produces copious amounts of the hormones progesterone and estrogen to prepare the uterus for implantation by thickening it and making the mucus of the cervix more thinner to allow passage of sperms. If the lady does not become pregnant, the corpus luteum will die and the uterine wall sheds in the menstrual phase.

<h3>3. Follicular phase:</h3>

This is the first phase and it starts on the first day the lady sees her period. It starts due to the anterior pituitary gland secreting the hormone follicle stimulating hormone (FSH) .The hormone will stimulate formation of ovarian follicles in the ovaries and only one matures and produces estrogen to inhibit all the other eggs from maturing and also thickening the uterus. It lasts for 14 days. The ovarian follicle matures into the graafian follicle that enters the ovulatory phase.

<h3>4. Gastrulation:</h3>

This is totally unrelated to the menstrual cycle and it is found in embryology after the egg has been fertilized during the menstrual cycle and matures into an embryo. In this stage of embryogenesis, there is formation of the gut of a developing embryo

Level: High School

Subject: Biology

Topic: Reproduction

Bezzdna [24]3 years ago

3 0

Answer:

The asnwer is C. Gastrulation.

Explanation:

Gastrulation is one of the stages of early embryonic development through which the trilaminar germinative disk is formed, which is a structure with three differentiated embryonic layers that will give rise to all the organs and tissues of the embryo. Gastrulation occurs just after embryo segmentation and implantation, that is, when the embryo has already been divided into many cells, it has become a blastocyst and has managed to nest in the endometrium, beginning pregnancy.

Knowing this, it can be concluded that it is not related to the menstrual cycle.

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Answer:

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"This tells us that non-human primates have in common with humans a fundamental ability to make approximate quantity judgments," says Cantlon. "Humans build on this talent by learning number words and developing a linguistic system of numbers, but in the absence of language and counting, complex math abilities do still exist."

Cantlon, her research assistant Allison Barnard, postdoctoral fellow Kelly Hughes, and other colleagues at the University of Rochester and the Seneca Park Zoo in Rochester, N.Y., reported their findings online May 2 in the open-access journal Frontiers in Comparative Psychology. The study tracked eight olive baboons, ages 4 to 14, in 54 separate trials of guess-which-cup-has-the-most-treats. Researchers placed one to eight peanuts into each of two cups, varying the numbers in each container. The baboons received all the peanuts in the cup they chose, whether it was the cup with the most goodies or not. The baboons guessed the larger quantity roughly 75 percent of the time on easy pairs when the relative difference between the quantities was large, for example two versus seven. But when the ratios were more difficult to discriminate, say six versus seven, their accuracy fell to 55 percent.

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3 years ago

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Alex777 [14]

Answer:

The digestive system excretes a solid waste, and the excretory system excretes liquid waste.

Explanation:

The digestive system is the system of the body that breaks down food substances to enhance so that they can absorb them. But it also excretes solid indigestible substances. For excreating, they use the defecation process.

Excretory system, on the other hand, is a system in the body that removes homeostatic wastes from the body by using a process which is called excretion. Excretory includes organs such as liver, sweat glands, lungs. Among this, the liver plays a critical role in the secretion of homeostatic wastes in the form of fluids.

The excretory system collects and then filters excess water which is present in the body and then excretes it as a liquid waste either from the liver, kidneys, or sweat glands on the skin through sweating.

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