Embryo Past paper 5

The chorionic cavity is also known as the:

• Amniotic cavity

• Primary yolk sac

• Extraembryonic coelom

• Trophoblastic cavity

Exocoelomic membrane is found in the:

• Amniotic cavity

• Chorionic cavity

• Embryoblast

• Primitive streak

Seminal vesicles produce:

• Mucus for lubrication

• Alkaline phosphatase

• Fructose-rich fluid

• Prostaglandin inhibitors

Bone resorption is stimulated by:

• Calcitonin

• Parathyroid hormone

• Growth hormone

• Aldosterone

Osteoclasts are stimulated by:

• Calcitonin

• Parathyroid hormone

• Vitamin D

• FSH

Which of the following is a diploid cell?

• Spermatid

• Spermatozoa

• Primary spermatocyte

• Secondary spermatocyte

The definitive placenta is formed by:

• Decidua basalis

• Decidua capsularis

• Chorion laeve

• Chorion frondosum

The embryonic period most sensitive to defects is:

• First 2 weeks

• Third to eighth week

• Ninth to twelfth week

• After birth

The basal layer of the endometrium contains:

• Spiral arteries

• Straight arteries

• Coiled arteries

• Branching arteries

Which gene plays a crucial role in cranial-caudal patterning?

• HOX gene (Homeobox)

• FGF

• WNT

• SHH