Which of the following is a function of hCG?

A) It breaks down the corpus lutem

B) It helps protect the blastocyst against being rejected

C) It prevents the developing placenta from secreting hormones

D) It stimulates the release of enzymes that enable the blastocyst to implant into the endometrium

C) It stimulates the breasts to become more glandular

The zona pellucida is located around the sperm's head.

True or False

Which of the following is not a characteristic of childhood?

A) Beginning of an ability to communicate

B) Becoming reproductionally functional

C) Establishing bowel control

D) Developing a high degree of voluntary muscular control

E) Secondary teeth replacing primary teeth

Which of the following is (are) true in regard to the fetal stage of development?

A) It begins 8 weeks after fertilization

B) The organ systems are mostly formed, although immature

C) The head is disporportionally large compared to the rest of the body at the beginning of the stage

D) It comes after the embryonic period

E) All of the above

Fetal hemoglobin is about 50% higher than maternal hemoglobin and has a greater attraction for oxygen.

True or False

Which of the following factors stimulates a newborn's first breath?

A) Increasing concentration of carbon dioxide

B) Decreasing pH

C) Low oxygen concentration

D) Drop in body temperature

E) All of the above

Hormones in milk production

_Stimulates development of aveolar glands at the ends of the ducts

_stimulates ductile systems to grow and branch

_Stimulates myoepithelia cells to contract to eject milk

_Stimulates mammary glands to secrete milk in abundance

A) estrogen B) progesterone C) prolactin D) Oxytocin

Fetal Stage

_Muscle movements stronger; skin covered with lanugo

_Rapid growth; ossification continues

_Weight gain; subcutatneous fat deposits; eyebrows and lashes; testes descend

_Ossification centers appear in bones; sex organs differentiate

A) 9th-12th week

B) 13th-16th week

C) 17th-20th week

D) 21st-38th week

As a rule, during adult hood:

A) skeletal muscles tend to lose strength

B) the circulatory system becomes less efficient

C) the skin becomes less elastic

D) weight usually increases

E) all of the above

Hardening of the zona pellucida after fertilization reduces the chance that other sperm will penetrate the oocyte.

True or False

Newborns produce concentrated urine which can cause dehydration.

True or False

Colustrum is a thick serious fluid secreted immediately after birth and is rich in fat and antibodies.

True or False

Which of the following adult structures is not derived from the same primary germ layer as the others?

A) nerves

B) blood vessels

C) muscles

D) bones

E) bone marrow

Which of the following are at high risk from week 3 through week 16 of a pregnancy?

A) heart

B) teeth

C) ears

D) central nervous system

_The process of growing old

_Kidneys unable to produce concentrated urine

_Uses stored fat for energy

_Birth to end of 1st 4 weeks

_Degenerative changes begin to occur

_Teeth begin to erupt, maturation of muscular and nervous sytems, communication begins

_Lost some intellecutal, coordination and sensory functions and decrease immune response

_Become reproductively functional, intellectual abilities increase

_Deciduous teeth replaced, bladder and bowel control

A) Neonatal B) Infancy C) childhood D) adolescence E) adulthood F) senesence

Substances that are exchanged across the placental membrane are:

A) oxygen and CO2

B) nutrients

C) embryonic wastes

D) all of these

The placenta is a vascular structure that functions to:

A) deliver nutrients to the fetus

B) secretes PTH and aldosterone

C) removes waste from the fetus

D) both A and C

A gastrula is an embryo consisting of:

A) endoderm

B) mesoderm

C) ectoderm

D) all of these

Which of the following provides the main source of energy for a newborn during its first few days?

A) glucose

B) glycogen

C) fat

D) protein

E) nucleic acids

The major body parts derived from endoderm are the epithelial lining of the:

A) digestive tract

B) respiratory tract

C) urinary bladder

D) urethra

E) all of the above

Nausea and vomiting in pregnancy may shild a fetus from foods that might contain toxins or pathogens.

True or False

_Zygote

_Growth

_Development

_Prenatal phase

_Postnatal phase

A) Changes from one life phase to another

B) From birth to death

C) From fertlization to birth

D) Results from a sperm cell and egg uniting

E) An increase in size

Pregnancy hormones

_Inhibits uterine contractions

_Promotes reabsorption of sodium that leads to water retention

_Maintains uterine wall, stiumlates mammary glands, and inhibits LH and FSH secretions
_Stimulates breast development

_Maintains high concentration of maternal blood calcium

A) Estrogen/progesterone B) Relaxin C) Placental lactogen D) Aldosterone E) PTH