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In which of the following, all listed genera belong to the same class of algae
Animals which give birth to young ones are called:
All of the following are functions of the sertoli cells in the seminiferous tubules EXCEPT
The sertoli cell mechanically supports developing sperm and produces androgen-binding protein, inhibin, and mullerian duct inhibitor, which causes regression of the mullerian duct system.
A sperm cell moving from the lumen of the seminiferous tubule to the exterior of the body passes through all of the following structures EXCEPT the
The structures through which a sperm passes from the test is to the exterior include the epididymis, ductus deferens, ejaculatory duct, prostatic urethra, membranous urethra, and penile urethra. The secretions of the prostategland empty into the prostatic urethra; the secretions of the seminal vesicles empty into the ejaculatory duct; and the secretions of the bulbourethral glands empty into the penile urethra.
During embryonic development the heart beat begins at the end of
Which of the following best represents the normal path of a sperm cell as it makes its way from the point of entry into the female’s reproductive tract to the place where fertilization typically occurs ?
A sperm is ejected by the male into the vagina. From the vagina the sperm move through the cervix into the uterus and finally the oviduct where fertilization occurs.
The function of the seminal vesicle is to
The seminal vesicles are involved in producing the seminal fluid. One of the components of the seminal fluid is an energy source for the sperm in the form of fructose.
Part of sperm involved in penetrating egg membrane is –
The head of mature mammalian sperm is made of:
The fertilization in human occurs at the junction of