Exam 20: Development, heredity, and Aging

What is the main difference between the colostrum produced during the first few days after birth and milk which is produced for the remainder of the lactation period?

Which of these is NOT a cause of the changes called "aging"?

Before birth the ductus arteriosus carries __________ blood.

Puberty

Problems involving the formation of the chorion would affect

Place the following steps of fertilization in the correct order from the beginning. 1)Sperm head enlarges and gives rise to the sperm cell nucleus. 2)Sperm cells attach to the cumulus cells of a secondary oocyte. 3)The head of one sperm cell penetrates the zona pellucida and enters the oocyte cytoplasm. 4)The oocyte nucleus completes the second meiotic division and gives off a second polar body. 5)Fusion of the two nuclei forming a zygote.

Human chorionic gonadotropin (HCG)

All of these develop from an outpocketing of the GI tract EXCEPT:

The major organs appear and begin to develop during

A pedigree

The stage with maximum cervical dilation until baby exits the vagina is

Which of the following tissues most likely developed from the endoderm layer of the embryo?

Which of the following tissues most likely developed from the ectoderm layer of the embryo?

Functions of the placenta include

Oncogenes

Before birth the ductus arteriosus carries blood from the _______ to the ______ thereby bypassing the _________.

During the last seven months of the prenatal period the developing individual is known as the

The gestation period usually lasts around ________ from the LMP.

The face develops from

Before birth,the foramen ovale allows blood to pass from the right atrium to the left atrium thereby by-passing the lungs and pulmonary circulation.Why?