Development

Question 1

the genetic material of the sperm fuses with that of the ovum to form a ____

Answer 1

ZYGOTE (fertilized ovum)

Question 2

FERTILIZATION usually occurs in the outer 1/3 (ampulla) of the _____ _____, usually within ___-___ hours after ovulation

Answer 2

UTERINE TUBE;

12-24

Question 3

the EMBRYONIC PERIOD of development extends from _____ through the _____ ______ of gestation

Answer 3

FERTILZATION;

8TH WEEK

Question 4

implantation usually takes place in the _______ of the uterus about ___-___ days post-fertilization

Answer 4

ENDOMETRIUM;

6-7 DAYS

Question 5

____ ______ - implantation anywhere but the endometrium

Answer 5

ECTOPIC PREGNANCY

Question 6

early in the 3rd week of embryonic development, three ____ _____ ____ form

Answer 6

PRIMARY GERM LAYERS

Question 7

what develops from the ENDODERM?

Answer 7

epithelial lining of the GI tract, respiratory tract, and several other organs

Question 8

what develops from the MESODERM

Answer 8

muscles, bones, c.t.

Question 9

what develops from the ECTODERM

Answer 9

nervous system, epidermis of the skin

Question 10

the PLACENTA is unusual in that It develops from two separate individuals - it has a _____ PORTION AND A ______ PORTION

Answer 10

MATERNAL AND FETAL

Question 11

the ___ ____ is a connection between the placenta and embryo/fetus

Answer 11

UMBILICAL CORD

Question 12

the placenta serves as a ____ _____ _____ between many substances in maternal and fetal blood, though blood cells themselves would typically not be exchanged

Answer 12

SITE OF EXCHANGE

Question 13

the placenta also PRODUCES HORMONES such as

Answer 13

progesterone

estrogens

human chorionic gonadotripin

relaxin

and others

Question 14

the term “FETUS” is used AFTER THE END OF THE ____ WEEK of development

Answer 14

8th week

Question 15

role of progesterone in pregnancy from corpus luteum in ovary

Answer 15

maintain endometrium of uterus

help prepare mammary glands for lactation

prepare mom’s body for birth

Question 16

roles of relaxin in pregnancy from placenta and corpus luteum

Answer 16

increases flexibility of pubic symphysis

helps dilate uterine cervix during labor

Question 17

roles of Human chorionic somatomammotropin (hCS) from placenta

Answer 17

helps prepare mammary glands for lactation

enhances growth by increasing protein synthesis

decreases glucose use and increases fatty acid use for ATP production

Question 18

role of corticotropin-releasing hormone from placenta

Answer 18

establishes the timing of brith

increases secretion of cortisol

Question 19

role of human chorionic gonadotropin (hCG in pregnancy from the placenta

Answer 19

rescuers corpus luteum form degeneration until the 3rd or 4th month of pregnancy

Question 20

technical name for birth

Answer 20

PARTURITION

Question 21

______ - causes UTERINE CONTRACTIONS (positive feedback)

Answer 21

OXYTOCIN

Question 22

true labor has 3 stages:

Answer 22

DILATION
EXPULSION
PLACENTAL DELIVERY

Question 23

stimuli such as suckling, or baby’s cry trigger higher brain centers in a mother to:

Answer 23

release prolactin and oxytocin

Question 24

PROLACTIN

Answer 24

milk synthesis and secretion

Question 25

OXYTOCIN

Answer 25

milk ejection