Repro Lec 3
Terms in this set (25)
Where do we make sperm?
In the seminiferous tubules, located in the testes
Two functions of gametes/testes
1) produce sperm
2) produce hormone
network of tubules housed WITHIN the mediastinum of the testis that are connected to the seminiferous tubules and merging into the efferent ducts
receive sperm from seminiferous tubules
aka central collecting duct
the connective tissue core of the testes that houses the rete tubules
something standing between
area between gamete and ____
a barrier to prevent autoimmune reactions from destroying the developing germ cells
made by peritubular cells surrounding the seminiferous tubule and the Sertoli cell junctional complexes
1) the peritubular layer is the first barrier against large molecular weight materials (mainly immunoglobulins)
2) the junctional complexes between Sertoli cells serve as a second barrier against immune cells and immunoglobulins
Why do we need to protect developing cells from immune cells (macrophages and lymphocytes) and immunoglobulins (antibodies)?
Because the WBCs would see the developing cells as foreign since the developing cells are undergoing meiosis and are immunologically different
The point at which epithelial cells join to one another in very close proximity
aka tight junctions
tunica albuginea of testis
a dense, white connective tissue covering the penis
Where do we make testosterone?
In the Leydig cells of the testes
What is the collecting duct?
What are the three parts of the epididymis?
1) caput epididymis - head
2) corpus epididymis - body
3) caudum epididymis - tail
How does the temperature of the scrotum compare to that of the testes?
They are relatively the same because both are in the scrotum
the compartment of the testicular parenchyma that surrounds the seminiferous tubules
the functional cells of a gland or organ supported by a connective tissue framework
Narrow, coiled tubules that produce sperm in the testes
Only contains seroli cells and germ cells
What types of cells are in the basal compartment?
What types of cells are in the adluminal compartment?
first step spermatids
peritubular myoid cells
flat cells found in the basement membrane, surround seminiferous tubules
contributes contraction to add to the flow of fluid secreted by Sertoli cells to allow newly formed spermatozoa to move into the rete tubules
Starting with the peritubular myoid cells and proceeding toward the center of a tubule, describe a seminiferous tubule
peritubular myoid cells, which surround basement membrane, which Sertoli cells are attached to, which form tight junctions with each other to separate the basal and adluminal compartments
Starting with the basal compartment, list off the 8 areas for sperm ejaculation pathway
1) basal compartment
2) adluminal compartment
3) rete testis
4) efferent ducts
6) vas deferens
What is the relationship between Sertoli cells and germ cells?
Sertoli cells "host" a maximum number of developing germ cells
Aka a species with a high number of Sertoli cells are capable of producing large numbers of spermatozoa
How does oxygen get to the developing cells in the adluminal compartment?
Oxygen needs to go between the peritubular myoid cells, through the basement to the developing cells and through the Sertoli cells to get to the adluminal developing cells
How do the germ cells get from the basal compartment to the adluminal compartment?
1) a tight junction forms on the basement membrane side between two Sertoli cells, the tight junction is in behind the germ cells ready to go cross over
2) the adluminal tight junction blocking the germ cells dissolves
How do sperm move around in the epididymis?
The muscle in the epididymis moves the sperm via contraction and fluid
Sperm do not swim in the epididymis
YOU MIGHT ALSO LIKE...
Comprehensive USMLE Step 2/COMLEX Level 2 Guide
Stem Cell Niche
Biology - Stem Cells
Midterm Gen Bio
OTHER SETS BY THIS CREATOR
Cardiovascular and Lymphatics
Repro Lecture 1
Histo - Week 4 Tues
Drugs - Lecture 3 - Pt 2