QUIZ 2 Flashcards
Function of Male Reproductive Tract (two)
- Produce and deliver sperm
- Synthesis and secretion of androgens
Spermatic Cord Functions (three)
- Suspends the testes
- Temperature regulation
- Regulates the concentration of Testosterone
Spermatic Cord Anatomy
- pathway for blood, lymph vessels, nerves,and ductus deferens
- extends from the abdominal inguinal ring to the dorsal side of testes
Structure and Function (two) of the Pampiniform plexus
testicular veins surround the testicular arteries, for countercurrent exchange of:
1. heat (atrial → venous blood)
2. testosterone (venous → atrial blood)
Excurrent Duct System anatomy and functions (3)
Made up of afferent ducts, epididymis, and ductus deferens…has smooth muscle and stereocilia
Functions: maturation, storage, and delivery of sperm
Scrotum Anatomy and Functions (4)
Four layers: skin, tunica dartos, scrotal fascia, parietal vaginal tunic
Functions: temperature sensor, temperature regulation, protection, and support
Penis Anatomy and Function
3 parts: base, shaft, glands (spongiosum and corpus cavernosum)
1. Cupolation
2. Urination
Why is Scrotal Temp Regulation Important? (3) (hint: pqs)
- Spermatogenesis (production)
- Fertilization capacity (quality)
- developmental potential of the zygote (survivability)
Testes Anatomy and Function (3)
Made of: Testicular capsule, parenchyma, mediastinum, rete tubules
For production of:
1. Spermatozoa
2. Androgens
3. Tubular Fluid (transport of spermatozoa)
Pattern of Hormone Secretion in Sexually Mature Males
GnRH → FSH → LH → Testosterone
Define Puberty in Males
Having an ejaculate that has threshold spermatozoa for fertilization (quantity and quality)
Define Lumination of Tubules
When the Seminiferous tubules grow after week 15 and much more after week 25
Which species reach puberty earlier?
Cattle: dairy breeds, early maturing, late maturing
Swine: maternal, meat breeds
Parenchyma Anatomy and Function
Made up of interstitial and tubular (seminiferous tubules)
Steps of Spermatogenesis (3)
- Proliferation (Basal)
- Meiotic (Adluminal)
- Differentiation (Adluminal)
What modifications do spherical spermatids undergo during differentiation?
- become motile
- condensing their nuclei for protection
- forming acrosomes for fertilization
Differentiation phases (G-CAM)
- Golgi phase
2.Cap phase - Acrosomal phase
- Maturation phase
Golgi Phase
- small vesicles of golgi → proacrosomic granules
- centrioles migrate to other side of nucleus
- golgi ves i le fusion → large acrosomic granule
- Proximal centriole forms attachment point of the flagellum
- Distal centriole gives rise to flagellum itself
The Cap Phase
- Acrosomal vesicle forms a cap over the nucleus
- golgi and other organelles migrate to distal portion
- DC (begins) → flagellum
Acrosomal Phase
- nucleus elongates
- microtubules → manchette
- Neck and annulus formed
- flagellum cont. to develop
Maturation Phase
- Manchette forms the post nuclear cap
2.mitochondria migrates to posterior side of nucleus - annulus forms connection between. middle and principal pieces of the flagellum
Steps for Penile Erection
- Flaccid penis → sexual arousal
- vasodilation of helicon arteries (inc blood flow)
- inc blood flow to cavernous tissue + dec venous outflow
- ejactulation (contraction of bulbospongiosus and ischiocavernosus)
- venous outflow
Copulatory Behaviour (MIE)
- Mounting
- Intro mission
- Ejaculation
Precopulatory Behaviour (PCAEP)
- search for sexual PARTNER
- COURTSHIP
- sexual AROUSAL
- ERECTION
- PENILE PROTRUSION
