Question 1

In a fetus, the umbilical arteries arise from the renal arteries.

Accepted Answer

The umbilical arteries in a fetus actually arise from the internal iliac arteries, not the renal arteries.

Question 2

During development of the hands and feet in the late embryonic stage, the fingers and toes form as extensions of muscular, nervous, and connective tissue from the limb buds. Completion of finger and toe extension triggers a process in which the webbed tissue between each digit is signaled/programmed to die. This process is known as ________.

Accepted Answer

The answer of During development of the hands and feet...

Question 3

The process of growing old is called ________.

Accepted Answer

The answer of The process of growing old is called...

Question 4

In an adult, the proximal portions of the umbilical arteries persist and supply blood to the ________.

Accepted Answer

The answer of In an adult, the proximal portions of...

Question 5

Aging-related changes include shrinking of the prostate in men and enlargement of the breasts in women.

Accepted Answer

This statement is incorrect. Aging-related changes in men can include an enlargement of the prostate, while aging-related changes in women can include a decrease in breast size and firmness.

Question 6

Some factors that help to stimulate the newborn's first breath are increasing CO₂, decreasing pH, decreasing O₂, decreasing body temperature, and mechanical stimulation.

Accepted Answer

These factors can stimulate the respiratory center in the brainstem to initiate the newborn's first breath.

Question 7

In an adult heart, the previous location of the foramen ovale is marked by a depression called the ________.

Accepted Answer

The answer of In an adult heart, the previous location...

Question 8

The structure that surrounds the cell membrane of the secondary oocyte is the ________.

Accepted Answer

The answer of The structure that surrounds the cell membrane...

Question 9

After birth, the ductus arteriosus constricts and becomes the ligamentum arteriosum.

Accepted Answer

The ductus arteriosus is a fetal blood vessel that allows blood to bypass the lungs. After birth, it normally constricts and eventually becomes the ligamentum arteriosum.

Question 10

The fertilized ovum is also called a(n)________.

Accepted Answer

The answer of The fertilized ovum is also called a(n)________....

Question 11

The slender projections that grow out from the trophoblast into the uterine wall are called ________.

Accepted Answer

The answer of The slender projections that grow out from...

Question 12

The neonatal period of development extends from birth to the end of one year.

Accepted Answer

The neonatal period extends from birth to the first 28 days of life.

Question 13

Conjoined twins result from incomplete twinning, which occurs during the first month of gestation.

Accepted Answer

The answer of Conjoined twins result from incomplete twinning, which...

Question 14

The period of development during which the contents of a zygote are divided into increasingly smaller cells is called ________.

Accepted Answer

The answer of The period of development during which the...

Question 15

If a pregnant woman becomes infected with the Varicella (chicken pox)virus during the embryonic stage, the fetus can develop eye problems, mental retardation, and delayed growth. The Varicella virus is a(n)________.

Accepted Answer

The answer of If a pregnant woman becomes infected with...

Question 16

In an adult, a solid, cordlike structure called the ________ develops in the place of the former umbilical vein.

Accepted Answer

The answer of In an adult, a solid, cordlike structure...

Question 17

The primary function of surfactant is to increase surface tension in the newborn's lungs.

Accepted Answer

The primary function of surfactant is actually to decrease surface tension in the lungs, particularly in premature or underdeveloped lungs. This helps to prevent the collapse of the alveoli (air sacs) during exhalation and maintain their inflation for efficient gas exchange.

Question 18

The pharmaceutical drug RU-486 is sometimes used for medical abortions. RU-486 blocks progesterone production. It cannot cross from the mother's blood into the placenta. The drug loses most of its abortive properties after the 1ˢᵗ trimester. This is likely because after the 1ˢᵗ trimester, the ________ begins producing a sufficient supply of progesterone and estrogen.

Accepted Answer

The answer of The pharmaceutical drug RU-486 is sometimes used...

Question 19

The adolescent period begins at the end of the first year and completes at puberty.

Accepted Answer

The adolescent period begins at the onset of puberty and completes in the late teens or early twenties.

Question 20

In the day or two before milk secretion begins, the breasts secrete ________.

Accepted Answer

The answer of In the day or two before milk...

Quiz 23: Pregnancy, Growth, and Development