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The fusion of a sperm cell and an ovum (egg cell) that restores the original chromosome number of forty-six, is a process known as . |
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The first twenty-two pairs of chromosomes that do not include the sex chromosomes, are known as chromosomes. |
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The (2words) is the one X chromosome of the female that is inactive, forming a clump that can be seen in the microscope as a dark spot located at the edge of a cell nucleus. |
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The Sertoli cells secrete (3 words) into the lumen of the seminiferous tubule to maintain a high concentration of testosterone in the lumen. |
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The (2 words) are the cells of the testis located outside of the seminiferous tubule that synthesize testosterone in response to luteinizing hormone. |
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Most of the male accessory organs are derived from the ducts, whereas the majority of the female accessory organs are derived from the ducts. |
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The penis of the male is a structure that is homologous to the of the female. |
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Collectively, follicle-stimulating hormone (FSH) and luteinizing hormone (LH) secreted by the anterior pituitary gland are known as the hormones due to their effects on the testes and the ovaries. |
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is a polypeptide hormone secreted by the Sertoli cells of the seminiferous tubules and by the granulosa cells of the ovarian follicles that specifically inhibits the secretion of (3 words) from the anterior pituitary. |
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10 | |
The most common indicator of the onset of puberty in girls is . |
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The proper order of the phases of the human sexual response is: , , , and . |
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The higher hematocrit in males compared to females is an example of a (2 words) characteristic and is due to the actions of . |
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13 | |
At the end of the second meiotic division, each of the two secondary spermatocytes produces two haploid cells, called . |
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The only nongerminal cell type in the seminiferous tubule is the cell which provides support for the developing germ cells and form the (hyphenated word) barrier. |
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The process of allows spermatids to undergo morphological changes to become spermatozoa. |
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The of the male serves as the site for sperm maturation and for storage of sperm between ejaculations. |
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The head of the spermatozoa is covered by a unique cap, known as the that contains required for fertilization. |
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In men, the urethra runs through the center of the (2 words) located on the ventral side of the penis. |
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(2 words) acts as both a neurotrasmitter and paracrine agent to stimulate the production of as a second messenger within vascular smooth muscle in the penis to stimulate of the muscle required to allow the increased blood flow necessary for penile . |
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20 | |
The term refers to the forcible expulsion of semen from the urethra out of the penis. |
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21 | |
An abnormally low sperm count (less than 20 million sperm per milliliter of semen) is called and is associated with decreased fertility. |
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Within the graafian follicle, the oocyte is surrounded by a ring of granulosa cells known as (2 words) and rests on a mound of granulose cells called the (2 words). |
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23 | |
The endometrium is composed of stratified squamous, nonkeratinized epithelium that serves as the innermost epithelial lining of the in the female. |
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Women are capable of multiple orgasms primarily because they lack that period of time called the period that characterizes the resolution phase of the male sexual response. |
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The largest follicle of the ovary containing a single, fluid-filled cavity or , and that is destined for ovulation is known as the mature follicle. |
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When the primary oocyte completes its first meiotic division, it forms a secondary oocyte and a much smaller body. |
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27 | |
After ovulation, the corpus luteum secretes two hormones characteristic of the second half of the menstrual cycle, estrogen and . |
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If fertilization does not occur, the corpus luteum will eventually regress to become a nonfunctional whitish-colored body called the corpus . |
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The major hormone and principal estrogen secreted by the growing follicle during the follicular phase of the ovary is while the main hormone of the luteal phase is . |
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30 | |
At ovulation, a oocyte arrested in metaphase II and surrounded by the (2 words) is released into the uterine tube. |
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The phase of the endometrium occurs when the ovary is in its luteal phase. |
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32 | |
The oral contraceptives usually consist of a synthetic estrogen combined with synthetic progesterone. The purpose of this combination of hormones is to prevent so that pregnancy cannot occur. |
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33 | |
is the term used to describe the cessation of activity in the ovary that occurs in women around the age of 50. |
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34 | |
During the passage of ejaculated semen through the female reproductive tract, the sperm undergo , a process whereby the sperm cells gain the ability to fertilize an ovum. |
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35 | |
In the female reproductive tract, ejaculated sperm can survive up to a period of about (spell out). |
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36 | |
After a zygote has undergone its third cleavage, it forms a solid ball of eight cells that resembles a mulberry, and is called a . |
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37 | |
The term is the hollow embryo that becomes implanted in the endometrial wall of the uterus. |
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38 | |
The trophoblast cells that make up the chorion membrane of the blastocyst secrete the hormone (3 words), that is maintains the corupus luteum until the placenta is able to produce adequate concentrations of . |
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39 | |
The cell layer of the embryonic inner cell mass that eventually will become the nervous system and the skin is called the . |
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40 | |
Embryonic stem cells are since each can give rise to all tissues except the trophoblast of the placenta are obtained from the (3 words) of a blastocyst. |
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41 | |
(2 words) biopsy is a new method of sampling that allows chromosomal disorders to be determined as early as 12 weeks of gestation which is much sooner than which does not provide results until 20 weeks of gestation and requires the removal of amniotic fluid and culturing the embryonic cells in this fluid. |
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42 | |
During labor, two chemical agents primarily stimulate powerful uterine contractions. released by the posterior pituitary gland and produce by the uterus. |
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43 | |
During lactation, stimulates the production of milk proteins, including casein and lactalbumin. |
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44 | |
The (2 words)secreted by the fetal adrenal cortex is converted to by the placenta prior to parturition to stimulate increased receptors in the uterus. |
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45 | |
The drug inhibits prolactin secretion. |
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46 | |
The fetus receives passive immunity in utero from the that cross the placenta and the in breast milk. |
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47 | |
The drug blocks the ability of progesterone to bind to its receptor and when combined with small amounts of stimulate uterine contractions that produces sloughing of the endometrium and abortion of the embryo. |
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48 | |
Enzymes in the acrosome are responsible for digesting the (2 words) and (2 words) to allow the sperm cell to enter the cytoplasm of the egg cell. |
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49 | |
When basal body temperatue is used to determine ovulation, temeperature will immediately prior to ovulation due to the actions of estradiol and then slightly when estradiol declines after ovultion. |
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