Module 3 Flashcards
Where is the site of spermatogenesis?
Seminiferous tubules.
What is the order from germ cell to sperm?
Germ cell (spermatogonium) Primary Spermatocyte Secondary Spermatocyte Spermatid Spermatozoa (sperm)
Which of the following are going through meiosis?
Spermatogonium Primary Spermatocyte Secondary Spermatocyte Spermatid Spermatozoa
Primary Spermatocyte
Secondary Spermatocyte
Spermatid
What is differentiation?
The process where round spermatids take to become functional spermatozoa. It can also be called SPERMIOGENESIS.
What structure does the sperm uses to condense its DNA into its head?
Protamines. Usually DNA is wrapped in histones, but in the sperm we find protamines instead.
How does oogonia proliferate?
Oogonia proliferate through mitosis
What is the Germinal Vesicle (GV) Stage?
The “frozen” state where oogonia is found. When they become primary oocytes they
immediately enter prophase of meiosis I and in many
species, including humans, stay in this state for years.
Which egg would be bigger, the egg of a frog or the egg of a mouse?
Frog
The main source of energy for sperms is ____________
Fructose
The glycoprotein layer that surrounds the oocyte is called
Zona Pellucida
The cumulus cells are located around the zona pellucida and utiliza hyaluronic acid to
Maintain the 3-dimensional structure of the complex.
How many polar bodies would we observe on a secondary oocyte of a human that has not been fertilised yet?
One. Meiosis II comes to a pause until the oocyte is fertilised, and only then it completes the division and forms another polar body.
Each spermatogonium gives rise to ____ haploid sperm and each oogonium gives rise to _____ haploid egg and _____ polar bodies.
4 sperm, 1 egg and 2 polar bodies
Caput Epididymis
- fluid resorption
- secretions
- sperm are immotile and incapable of fertilising egg
- peristaltic movements along epididymis
- maturation (morphology, biochem., physiology)
Cauda epididymis
- sperm storage
- immotile but capable of motility (activation)
