Chapter 21

In what ways do asexual and sexual reproduction differ?

Describe the male and female reproductive structures.

Describe gametogenesis in males and females.

A sperm cell follows which path? A. seminiferous tubules, epididymis, vas deferens, urethra; B. urethra, vas deferens, seminiferous tubules, epididymis; C. seminiferous tubules, vas deferens, epididymis, urethra; D. epididymis, seminiferous tubules, vas deferens, urethra; E. epididymis, vas deferens, seminiferous tubules, urethra

An egg cell that is not fertilized follows which path? A. ovary, oviduct, uterus, cervix, vagina; B. ovary, uterus, oviduct, cervix, vagina; C. oviduct, ovary, cervix, uterus, vagina; D. oviduct, ovary, uterus, cervix, vagina; E. ovary, oviduct, cervix, uterus, vagina

Which of the following is mismatched? A. urethra: sperm passage; B. Leydig cells: androgen production; \(\mathbf{C}\). vas deferens: semen production; D. seminiferous tubules: sperm production

Gametogenesis A. begins at puberty in males and females; B. requires that the Leydig cells of males produce semen; C. results in the production of diploid cells from haploid cells; D. begins at puberty in females; E. requires that meiosis halve the chromosome number so that sperm and eggs carry half the number of chromosomes

The release of the oocyte from the follicle is caused by A. a decrease in estrogen; B. an increase in \(\mathrm{FSH} ;\) C. an increase in \(\mathrm{LH} ;\) D. an increase in progesterone

Menstruation is regulated such that A. increasing estrogen levels have a positive feedback effect on FSH and LH; B. increasing FSH levels lead to ovulation; C. as progesterone levels increase, so do \(\mathrm{FSH}\) and \(\mathrm{LH}\) levels; D. ovulation occurs on the fifth day of the cycle; E. the placenta produces \(\mathrm{FSH},\) which stimulates ovulation

The path of a sperm during fertilization is A. follicle cells, egg plasma membrane, zona pellucida; B. egg plasma membrane, zona pellucida, follicle cells; C. egg plasma membrane, follicle cells, zona pellucida; D. zona pellucida, follicle cells, egg plasma membrane; E. follicle cells, zona pellucida, egg plasma membrane

Development of female reproductive structures A. requires the SRY gene; B. requires that estrogen is secreted by the developing fetus; \(\mathrm{C} .\) will occur only when no testosterone is present; D. occurs when the ovaries secrete hormones that stop testicular development