Question:
Which of the following statements is wrong?
Which of the following statements is wrong?
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The pelvic urethra is the primary site of semen formation.
The penile urethra merely acts as a conduit to transport the fully mixed semen out of the body during ejaculation.
The penile urethra merely acts as a conduit to transport the fully mixed semen out of the body during ejaculation.
Updated On: Jul 21, 2026
- Penis has the dual function
- Terminal part of boar's penis is spiralled
- Intromission in bull is of shorter (about 2 seconds) duration
- Secretion of accessory sex glands mixes with spermatic fluid in penile urethra
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The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept:
The male reproductive tract consists of the testes, epididymis, ductus deferens, accessory sex glands, and the penis.
Semen is formed by the combination of spermatozoa and seminal plasma secreted by the accessory sex glands.
Detailed Explanation:
Let us analyze each option to identify the incorrect statement:
Option (A): The penis has a dual function.
It serves as a passageway for both urine excretion (urinary tract) and semen deposition (reproductive tract).
This is a correct statement.
Option (B): The terminal part of the boar's penis is spiralled.
The corkscrew-like morphology of the glans penis in boars allows it to engage and lock into the cervix of the sow during prolonged ejaculation.
This is a correct statement.
Option (C): Copulation in bulls is rapid.
The bull has a fibroelastic penis with a sigmoid flexure.
Intromission and ejaculation are completed very quickly, typically within 1 to 2 seconds.
This is a correct statement.
Option (D): Mixing of accessory sex gland secretions and spermatic fluid.
The accessory sex glands (vesicular, prostate, and bulbourethral glands) empty their secretions into the pelvic urethra at the colliculus seminalis.
The spermatozoa from the vas deferens also enter the pelvic urethra at this site.
Therefore, the mixing of these fluids occurs in the pelvic urethra, not the penile urethra.
This makes Option (D) the incorrect statement.
Step 2: Final Answer:
The incorrect statement is that accessory sex gland secretions mix with spermatic fluid in the penile urethra.
The male reproductive tract consists of the testes, epididymis, ductus deferens, accessory sex glands, and the penis.
Semen is formed by the combination of spermatozoa and seminal plasma secreted by the accessory sex glands.
Detailed Explanation:
Let us analyze each option to identify the incorrect statement:
Option (A): The penis has a dual function.
It serves as a passageway for both urine excretion (urinary tract) and semen deposition (reproductive tract).
This is a correct statement.
Option (B): The terminal part of the boar's penis is spiralled.
The corkscrew-like morphology of the glans penis in boars allows it to engage and lock into the cervix of the sow during prolonged ejaculation.
This is a correct statement.
Option (C): Copulation in bulls is rapid.
The bull has a fibroelastic penis with a sigmoid flexure.
Intromission and ejaculation are completed very quickly, typically within 1 to 2 seconds.
This is a correct statement.
Option (D): Mixing of accessory sex gland secretions and spermatic fluid.
The accessory sex glands (vesicular, prostate, and bulbourethral glands) empty their secretions into the pelvic urethra at the colliculus seminalis.
The spermatozoa from the vas deferens also enter the pelvic urethra at this site.
Therefore, the mixing of these fluids occurs in the pelvic urethra, not the penile urethra.
This makes Option (D) the incorrect statement.
Step 2: Final Answer:
The incorrect statement is that accessory sex gland secretions mix with spermatic fluid in the penile urethra.
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