Hi please I need help with these questions. I am not sure about my answer. Pleas

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Hi please I need help with these questions. I am not sure about my answer. Please help with some explanation. statements as true or false. True/False Section Please correctly identify each ofthe following Mark "a" for true and "b" for false. Impotence means that a male cannot produce "normal" or "physiologically active" spermatozoa Maternal blood actually mixes directly with feta blood within the placenta during nutrient exchange 3. Both males & multiple orgasms if sexual stimulation is maintained or continued females can achieve beyond the initial orgasm. ovulated oocytes secrete allurin functions as a chemotaxic attractant for spermatozoa. which Females, like males, continue to produce new gametes throughout life just far less numbers of them 6. In Prophase I of Meiosis, homologous chromosome pairs up and can exchange large pieces of line 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. 8. Penetration of the oocyte by a sperm cell 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 mesonephric tubules (Wolffian ducts for her reproductive ducts. 10. Pregnancy is maintained initially by bcG (human gonadotropin) keeping the Corpus hereum chorionic viable and actively secreting progesterone until the placenta can take over. 11. The largest component of is the nutrient secretion (fructose, etc.)from the seminal vesicles. semen 12. ovulation results from a mid-cycle surge ofFsH ollicle stimulating Hormone). 13 PsNS mediated release of nitric oxide causes an increase in blood flow into corpus cavernosa bodies within the shaft ofthe penis creating pressure that essentially closes off drainage and makes the penis rigid or crect. 14 A female oocyte remains in a state of suspended animation" (stuck in Metaphase I) and will not finis the process of Meiosis ess fertilized by a sperm. unl 15. In order to survive, a developing embryo must digest its way into the endometrial lining of the uterus in a process called Implantation. T 16. The external genitalia of both genders is identical for almost the first trimester of development. 17. The processes of Capacitation that begins in the epididymis "teaches" sperm to behave like sperm 18 Circumcision is simply the surgical removal of the foreskin (prepuce) from the glans penis. 19 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 the scrotum play a 20. critical role in maintaining a cooler temperature in the testes for appropriate spermatogenesis.

Explanation / Answer

1) false because impotence means erectile dysnfunction in male.

2) false there is no mixing but if it occurs occassionally than the mother body evoke an immune response.

3) true.it may be in the case of rape or sexual assaults

4) true. Alurin is secreted by Xenopus oocyte which is 21 kDa in weight and is a chemoattractant.

5) false. Spermatogenesis is a feature of man which continues untill the end of their life but oogenesis in females it stops after a certain period of time which is called menopause.

6) true. Crossing over takes place in homologus chromosome in prophase 1 of meiosis 1

7) true.

8) true.it is called fast block in which the membrane potential of ovum change and results in check to polyspermy.

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