Importance means that a male cannot produce \"normal\" or \"physiologically acti
ID: 90946 • Letter: I
Question
Importance means that a male cannot produce "normal" or "physiologically active" Maternal blood actually mixes directly with fetal blood within the placenta during nutrient exchange. Both males & females can achieve multiple orgasms if sexual stimulation is maintained or continued beyond the initial orgasm. Ovulated oocytes secrete allurin which functions as a chemotaxic attractant for spermatozoa. Females, like males, continue to produce new gametes throughout life-just far less numbers of them. In Prophase I of Meiosis, homologous chromosome pairs line up and can exchange large pieces of DNA in a process called "crossing-over" that increases the variability of gametes. Humans are the only species that use sexual intercourse for more than the production of offspring. Penetration of the oocyte by a sperm results immediately in a "wave of depolarization" the spreads around the oocyte knocking off any other spermatozoa- this is called a "Fast Block" to polyspermy. A developing female fetus retains meson tubules (Wolffian ducts) for her reproductive ducts. Pregnancy is maintained initially by hCG (human chorionic gonadotropin) keeping the Corpus lureum viable and actively secreting progesterone until the placenta can take over. The largest component of semen is the nutrient secretion (fructose, etc.) from the seminal vesicles. Ovulation results from a mid-cycle surge of FSH Follicle Stimulating Hormone). PSNS mediated release of nitric oxide causes an increase in blood flow into corpus cavernosa bodies within the shaft of the penis creating pressure that essentially closes off venous drainage and makes the penis rigid or erect. A female oocyte remains in a state of "suspended animation" (stuck in Metaphase II) and will not finish the process of Meiosis unless fertilized by a sperm. In order to survive, developing embryo must digest its way into the endometrial lining of the uterus in a process called Implantation. The external genitalia of both genders is identical for almost the first trimester of development. The processes of Capacitation that begins in the epididymis "teaches" sperm to behave like sperm. Circumcision is simply the surgical removal of the foreskin (prepuce) from the glans penis. The process of Meiosis produces 4 haploid daughter cells that are exactly genetically identical. The Cremaster muscle in spermatic cords & the Dartos muscle in the wall of play a critical role in maintaining a cooler temperature in the testes for appropriate spermatogenesis.Explanation / Answer
Answer 1: False
Reason- Impotence or erectile dysfunction means the inability to maintain or sustain erection for sexual intercourse. This can happen due to problem with blood vessels, nerves or tissue of penis.
Answer 2: False
Reason- Placenta receive blood supply from both maternal and fetal system and has two different circulatory system for blood( uteroplacental and fetoplacental circulation). Oxygen and nutrients can be exchanged but no intermingling of blood occur in placenta.
Answer 3: True
Reason- Orgasm can be refered to as rhythmic muscle contaction that occur and last for a few seconds.Females can have a longer orgasm than males but both sexes can acheive multiple times orgasm
Answer 4: False
Reason- Allurin is a sperm chemoattractant, that is not secreted by oviduct but synthesized by non cilliated secetory cells in the luminal epithelium of oviduct, and are mixed with eggs as they progress down the oviduct.
Answer 5: False
Reason-Female aren't born with specific number of gametes, they producemore ovum than that, but as the older they get the lower the quality is until menopause were they are stopped being reproductive.
Unlike males were the gametes are produced longer than females. But after enough reduction in testotroen levels their reproductive ability is stopped.