Which ducts form the female reproductive tract in the absence of AMH?
A) Wolffian ducts
B) Müllerian ducts
C) Neural ducts
D) Urogenital ducts
📖 شرح: Müllerian ducts form uterus, fallopian tubes, and upper vagina.
الإجابة الصحيحة: B
Which factor is essential for ovarian development?
A) SOX9
B) AMH
C) WNT4
D) SRY
📖 شرح: WNT4 promotes ovarian differentiation and suppresses testis pathways.
الإجابة الصحيحة: C
Which hormone is essential for the development of male external genitalia?
A) Estrogen
B) Progesterone
C) Dihydrotestosterone (DHT)
D) Cortisol
📖 شرح: DHT is required for masculinization of external genitalia.
الإجابة الصحيحة: C
Which structure develops into the clitoris in the absence of androgens?
A) Genital tubercle
B) Urogenital sinus
C) Wolffian duct
D) Müllerian duct
📖 شرح: The genital tubercle forms the clitoris without androgen influence.
الإجابة الصحيحة: A
Which ducts regress during female phenotypic development?
A) Wolffian ducts
B) Müllerian ducts
C) Neural ducts
D) Urachal ducts
📖 شرح: Wolffian ducts regress without testosterone.
الإجابة الصحيحة: A
Which hormone causes fusion of the labioscrotal folds in males?
A) Estrogen
B) DHT
C) AMH
D) FSH
📖 شرح: DHT promotes fusion of labioscrotal folds to form the scrotum.
الإجابة الصحيحة: B
Which structure forms the uterus and fallopian tubes?
A) Wolffian ducts
B) Müllerian ducts
C) Genital tubercle
D) Urogenital sinus
📖 شرح: Müllerian ducts form female internal reproductive structures.
الإجابة الصحيحة: B
Which gene is responsible for androgen receptor function?
A) SRY
B) AR gene
C) SOX9
D) WNT4
📖 شرح: The AR gene encodes the androgen receptor required for male differentiation.
الإجابة الصحيحة: B
Which condition results from androgen insensitivity?
A) Female internal ducts with male external genitalia
B) Male internal ducts with female external genitalia
C) Complete female phenotype despite XY karyotype
D) Ambiguous genitalia with XX karyotype
📖 شرح: Complete androgen insensitivity leads to a female phenotype in XY individuals.
الإجابة الصحيحة: C
Which hormone is responsible for regression of Müllerian ducts in males?
A) Testosterone
B) DHT
C) AMH
D) LH
📖 شرح: AMH causes Müllerian duct regression.
الإجابة الصحيحة: C
Which factor promotes female external genital development?
A) High DHT levels
B) Absence of androgens
C) Presence of AMH
D) High testosterone levels
📖 شرح: Female external genitalia develop by default without androgens.
الإجابة الصحيحة: B
Which structure becomes the penile urethra under androgen influence?
A) Genital tubercle
B) Urogenital folds
C) Labioscrotal folds
D) Müllerian ducts
📖 شرح: Urogenital folds fuse to form the penile urethra in males.
الإجابة الصحيحة: B
Which structure stores and matures sperm?
A) Seminiferous tubules
B) Epididymis
C) Vas deferens
D) Prostate gland
📖 شرح: The epididymis stores and matures sperm.
الإجابة الصحيحة: B
Which structure produces the majority of seminal fluid?
A) Seminal vesicles
B) Prostate gland
C) Bulbourethral glands
D) Epididymis
📖 شرح: Seminal vesicles contribute most of the seminal fluid.
الإجابة الصحيحة: A
Which structure transports sperm from the epididymis to the ejaculatory duct?
A) Urethra
B) Vas deferens
C) Seminiferous tubules
D) Prostate gland
📖 شرح: The vas deferens carries sperm toward the ejaculatory duct.
الإجابة الصحيحة: B
Which gland surrounds the urethra just below the bladder?
A) Seminal vesicle
B) Prostate gland
C) Bulbourethral gland
D) Adrenal gland
📖 شرح: The prostate surrounds the proximal urethra.
الإجابة الصحيحة: B
Which structure is responsible for sperm production?
A) Prostate gland
B) Seminiferous tubules
C) Epididymis
D) Vas deferens
📖 شرح: Sperm are produced in the seminiferous tubules.
الإجابة الصحيحة: B
Which structure passes through the inguinal canal?
A) Urethra
B) Vas deferens
C) Ejaculatory duct
D) Seminal vesicle
📖 شرح: The vas deferens travels through the inguinal canal.
الإجابة الصحيحة: B
Which gland secretes a clear mucus-like fluid during arousal?
A) Seminal vesicles
B) Prostate gland
C) Bulbourethral glands
D) Adrenal glands
📖 شرح: Bulbourethral glands secrete pre-ejaculate fluid.
الإجابة الصحيحة: C
Which structure contributes enzymes and zinc to semen?
A) Seminal vesicles
B) Prostate gland
C) Epididymis
D) Testis
📖 شرح: The prostate secretes enzymes and zinc-rich fluid.
الإجابة الصحيحة: B