Chapter 27

\(A(n)\) _____ produces both eggs and sperm. a. hermaphrodite b. asexual organism C. ovary d. testis

The end product of cleavage is a(n)______. a. blastula b. gastrula c. embryo d. fetus

A(n) ______ undergoes gastrulation. a. gastrula b. blastula c. somite d. neural tube

Meiotic divisions of germ cells in the ____give rise to sperm. a. seminal vesicles b. prostate gland c. penis d. seminiferous tubules

A male has an erection when_____. a. muscles running the length of the penis contract b. germ cells release a surge of testosterone c. the posterior pituitary releases oxytocin d. spongy tissue inside the penis fills with blood

In humans, fertilization usually occurs in _______. a. the uterus b. the vagina c. an oviduct d. an ovary

During a menstrual cycle, a mid-cycle surge of \(-\) secreted by the pituitary triggers ovulation. a. estrogen b. progesterone c. luteinizing hormone (LH) d. follicle-stimulating hormone (FSH)

After ovulation, the corpus luteum secretes _____. a. luteinizing hormone (LH) b. progesterone c. follicle-stimulating hormone (FSH) d. prolactin

A______implants in the lining of the human uterus. a. zygote b. blastocyst c. gastrula d. fetus

Human milk contains ______. a. antibodies b. lactose c. fats and proteins d. all of the above

During labor, secretion of oxytocin causes ______. a. uterine contractions b. rupture of the amnion c. ovulation d. production of milk proteins

Birth control pills deliver synthetic ______. a. estrogens and progesterone b. testosterone c. follicle-stimulating hormone d. luteinizing hormone

Number these events in human development correctly (1 to 6). _____gastrulation _____blastocyst forms _____zygote forms _____tail disappears _____neural tube forms _____implantation occurs

Which of the following STDs are caused by bacteria? a. Chlamydia b. Gonorrhea c. Genital warts d. Trichomoniasis e. a and b f. All of the above

Match each human reproductive structure with its description. $$ \text {testis} \quad \quad \text {a. maternal and fetal tissues} $$ $$ \text {vas deferens } \quad \quad \text {b. adds fluid to sperm in semen} $$ $$ \text {placenta } \quad \quad \text {c. produces testosterone} $$ $$ \text {vagina } \quad \quad \text {d. produces estrogen and progesterone} $$ $$ \text {ovary} \quad \quad \text {e. conveys egg to uterus} $$ $$ \text {oviduct } \quad \quad \text {f. secretes milk} $$ $$ \text {prostate gland } \quad \quad \text {g. birth canal} $$ $$ \text {mammary gland } \quad \quad \text {h. conveys sperm toward urethra} $$