Gametogenesis

The video tutorial explains the processes of spermatogenesis and oogenesis, detailing the phases involved in the formation and maturation of sperm and ova. It describes the structure of sperm, highlighting its components such as the head, neck, middle piece, and tail, and the role of mitochondria in motility. The tutorial also covers the structure of the ovum, including its nucleus and surrounding layers. Hormonal control of spermatogenesis is discussed, emphasizing the roles of LH and FSH.

What is the role of luteinizing hormone (LH) in spermatogenesis?

• It stimulates the Sertoli cells to secrete factors.

• It acts on Leydig cells to secrete androgens.

• It directly stimulates sperm production.

• It inhibits the secretion of androgens.

During which phase do spermatogonia stop dividing and start growing?

• Multiplication phase

• Growth phase

• Maturation phase

• Spermiogenesis

What is the function of the acrosome in the sperm head?

• It connects the head and the middle piece.

• It contains enzymes to penetrate the ovum.

• It provides energy for motility.

• It encloses the sperm in a plasma membrane.

Which part of the sperm contains mitochondria?

• Neck

• Head

• Middle piece

• Tail

At what stage does oogenesis begin in females?

• At birth

• During puberty

• During embryonic development

• After fertilization

What is the primary follicle surrounded by?

• A zona pellucida

• A fluid-filled cavity

• Multiple layers of theca cells

• A single layer of granulosa cells

What triggers the completion of the second meiotic division in oogenesis?

• Release of the first polar body

• Formation of the Graafian follicle

• Fertilization by a sperm

• Ovulation

What is the zona pellucida?

• A new membrane formed around the secondary oocyte

• A thick cellular layer of the ovum

• A layer surrounding the ooplasm

• A fluid-filled cavity in the follicle

What is the diameter of the mature human ovum?

• 10 mm

• 1 mm

• 0.1 mm

• 0.01 mm

What is the outermost layer of the ovum called?

• Zona pellucida

• Germinal vesicle

• Oolemma

• Corona radiata