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ovulation

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Journal Articles
The American Biology Teacher. 2012; 749613–618 doi: https://doi.org/10.1525/abt.2012.74.9.4
Published: 01 November 2012
...Jennifer J. Venditti; Cynthia A. Surmacz In this guided inquiry, students explore the complex hormonal regulation of the female reproductive cycle using inexpensive ovulation and pregnancy detection kits that are readily available over the counter. This hands-on activity engages students in the...
Images
Interpretation of <b>ovulation</b> and pregnancy kits. <b>Ovulation</b> results are shown...
Published: 01 November 2012
Figure 2. Interpretation of ovulation and pregnancy kits. Ovulation results are shown in panels A and B. (A) The two bands, control and test, indicate a valid test positive for LH. (B) The single control band indicates a valid test negative for LH. Pregnancy results are shown in panels C and D Figure 2. Interpretation of ovulation and pregnancy kits. Ovulation results are shown in panels A and B. (A) The two bands, control and test, indicate a valid test positive for LH. (B) The single control band indicates a valid test negative for LH. Pregnancy results are shown in panels C and D More
Journal Articles
The American Biology Teacher. 1966; 288645–646 doi: https://doi.org/10.2307/4441455
Published: 01 October 1966
...A. M. Showalter Copyright 1966 The National Association of Biology Teachers Ovule, Ovary, Fertilization, Albumen: Confusion * A. M. Showalter, Madison College, Harrisonburg, Virginia The author delineates what he considers the current confusion as to the use of the terms indicated in the title...
Journal Articles
The American Biology Teacher. 2012; 748575–580 doi: https://doi.org/10.1525/abt.2012.74.8.8
Published: 01 October 2012
... with rapid-cycling Brassica rapa , also known as Fast Plants. Isolated ovules were used to attract pollen tubes that were triggered to grow through explants of female flower parts. The activity provides insight into the in vivo situation of plant reproduction, appealing visual results, and the...
Journal Articles
The American Biology Teacher. 2014; 76112–16 doi: https://doi.org/10.1525/abt.2014.76.1.4
Published: 01 January 2014
... phase, the primordial follicle (PRF) develops into a primary follicle (PF), then a secondary follicle (SF), and finally a Graafian follicle (GF). As this phase progresses, the estrogen level also increases (see text). Ovulation, indicated by the center dark arrow, marks the end of the follicular phase...
Journal Articles
The American Biology Teacher. 2019; 8111 doi: https://doi.org/10.1525/abt.2019.81.1.1
Published: 01 January 2019
... ELISA to simulate testing female pandas’ urine to determine whether they are ovulating and began class with students reading a short introduction to the lab. When I initially read this same introduction, it elicited many questions in me, a revelation I shared with students. As they reviewed the...
Journal Articles
The American Biology Teacher. 2016; 787613–614 doi: https://doi.org/10.1525/abt.2016.78.7.613
Published: 01 September 2016
..., and ovules are fertilized; elsewhere in this book, ovaries are fertilized and flowers are fertilized. Now just exactly where is this male gamete going, and with what does it actually join? Will students understand “diploid sporophyte pollen grains are undergoing meiosis to form a haploid...
Journal Articles
The American Biology Teacher. 2016; 782149–154 doi: https://doi.org/10.1525/abt.2016.78.2.149
Published: 01 February 2016
... received, the more ovules that could be fertilized to make seeds. The plant with the most seeds will pass on its genes more and have high fitness . Pollinators that gave away all their pollen grains had higher plant male fitness than those that did not give away all their pollen grains. Why? Answer...
Journal Articles
The American Biology Teacher. 2015; 779712–713 doi: https://doi.org/10.1525/abt.2015.77.9.12d
Published: 01 November 2015
..., “fertilisation”), which suggests NPK mineral fertilizer or organic compost. In my opinion, all biology books should abandon this old “farmer language” for what is better called “syngamy” (literally the union of gametes). Like so many other books, this one refers to fertilization of eggs, fertilization of ovules...
Images
Semi- in vivo  assay demonstrating pollen tube targeting in fast-cycling  B...
Published: 01 October 2012
Figure 3. Semi- in vivo assay demonstrating pollen tube targeting in fast-cycling Brassica rapa. (A) Excised ovule of a Brassica rapa pistil. The dashed line indicates the position of the embryo sac, which is visible only in sections of fixed tissue. (B) Germinating pollen grain on a stigma Figure 3. Semi- in vivo assay demonstrating pollen tube targeting in fast-cycling Brassica rapa. (A) Excised ovule of a Brassica rapa pistil. The dashed line indicates the position of the embryo sac, which is visible only in sections of fixed tissue. (B) Germinating pollen grain on a stigma More
Images
Feedback mechanisms of the ovulatory menstrual cycle. (I) Adenohypophyseal ...
Published: 01 January 2014
Figure 2. Feedback mechanisms of the ovulatory menstrual cycle. (I) Adenohypophyseal release of luteinizing hormone (LH) stimulates ovulation as well as the formation of the corpus luteum from the ruptured follicle. (II) Adenohypophyseal release of follicle-stimulating hormone (FSH) stimulates Figure 2. Feedback mechanisms of the ovulatory menstrual cycle. (I) Adenohypophyseal release of luteinizing hormone (LH) stimulates ovulation as well as the formation of the corpus luteum from the ruptured follicle. (II) Adenohypophyseal release of follicle-stimulating hormone (FSH) stimulates More
Journal Articles
The American Biology Teacher. 2015; 77299–106 doi: https://doi.org/10.1525/abt.2015.77.2.4
Published: 01 February 2015
... spinosissima (a cactus) androecium [in female plants] pollen production N Strittmatter et al., 2002 Consolea spinosissima (a cactus) gynoecium [in male plants] sperm reception; ovule and fruit production N Strittmatter et al., 2002 Fragaria virginiana (strawberry) stamens pollen...
Images
Cyclical diagram of the ovulatory menstrual cycle. Innermost yellow layer (...
Published: 01 January 2014
corpus luteum. During the follicular phase, the primordial follicle (PRF) develops into a primary follicle (PF), then a secondary follicle (SF), and finally a Graafian follicle (GF). As this phase progresses, the estrogen level also increases (see text). Ovulation, indicated by the center dark arrow corpus luteum. During the follicular phase, the primordial follicle (PRF) develops into a primary follicle (PF), then a secondary follicle (SF), and finally a Graafian follicle (GF). As this phase progresses, the estrogen level also increases (see text). Ovulation, indicated by the center dark arrow More
Journal Articles
The American Biology Teacher. 2014; 769643–647 doi: https://doi.org/10.1525/abt.2014.76.9.14
Published: 01 November 2014
..........................4:231-A, 4:238-A Ovulation.......................1:12-F Scientific practices.......................5:328-I Scientific process.......................9:595-I Scientific writing.......................8:551-I Second law of thermodynamics.......................2:88-A Soil ecology...
Journal Articles
The American Biology Teacher. 2012; 749667–671 doi: https://doi.org/10.1525/abt.2012.74.9.14
Published: 01 November 2012
..........................2:111-H Osmosis.......................6:392-A Ovulation.......................9:613-I Pedagogy.......................4:270-Q Pedigree analysis.......................4:224-RL Phenotype.......................2:117-H, 5:341-Q Pheromones.......................3:145-F, 7:490-I...
Journal Articles
The American Biology Teacher. 2012; 749605–612 doi: https://doi.org/10.1525/abt.2012.74.9.3
Published: 01 November 2012
...–130 million sperm cells. After ovulation, an egg is available to be fertilized for 12–48 hours. 5 Sperm cells live only 48 hours after ejaculation. Adult women may produce about 400 eggs during their lifetimes. But few of the ova are actually used, and at least one ovum, or egg, is released each...
Journal Articles
The American Biology Teacher. 2011; 736353–356 doi: https://doi.org/10.1525/abt.2011.73.6.9
Published: 01 August 2011
... (e.g., blocking sperm, killing sperm, or preventing ovulation). Students then split into the predetermined small groups to read and analyze the mini-cases about Kaylee as she moves through the stages of her life. As students read the cases and answer the corresponding questions, they share...
Journal Articles
The American Biology Teacher. 2009; 715311 doi: https://doi.org/10.2307/27669439
Published: 01 May 2009
... (fertilized ovules, scattered monocot bundles, etc it is a welcome addition to my collection. It cannot replace standard textbooks on plant morphology (Gifford & Foster, 1989), but it provides a nice vignette of each of the covered topics, with good illustrations and an integrated set of modern references. A...
Journal Articles
The American Biology Teacher. 2008; 706345–349 doi: https://doi.org/10.2307/30163294
Published: 01 August 2008
... insures natural self-fertilization. He knew how to remove the anthers from a flower before its own pollen is shed, and how to trans- fer pollen from another plant onto the stigma to create hybrid seeds. He knew the role of ovules (Mendel called them "germinal cells") and pollen cells in fertilization. "[P...
Journal Articles
The American Biology Teacher. 2008; 70117–22 doi: https://doi.org/10.2307/30163188
Published: 01 January 2008
... ovulation in the normal female, the mature ovarian follicle ruptures, releasing the ovum. The remains of this rup- tured ovarian follicle transform into a new endocrine organ, the corpus luteum. The corpus luteum secretes hormones that prepare the uterus for a possible pregnancy in the event the ovulated...