ANSC 1401 Exam #4 Questions With 100% Correct Answers

ANSC 1401 Exam #4 Questions With 100% Correct Answers Reproductive efficiency - answer# live offspring born in a period of time importance of repro efficiency - answermore born --> more to sell-->stability of operation repro efficiency effect on maintenance cost/unit - answermore babies--> lower cost/unit repro efficiency effect on selection process - answermore babies--> greater oppurtunity for genetic improvement species differences - answerknow what environment, management, and goal is best for each animal physiology influence on repro efficiency - answerdoes animal have physical ability to reproduce genetic potential influence on repro efficiency - answerdoes animal have gene for multiples nutrition influence on repro efficiency - answertoo fat or too thin season influence on repro efficiency - answerspring long days = best to repro other factors influence on repro efficiency - answerheat+humidity not good for repro Testes - answerprimary sex organ in males Gamete (sperm) function - answerin testicle, sperm is produced by seminiferous tubules endocrine function - answerwithin testicle, testosterone is produced by interstitial cells epididymis - answerlong tube attached to side of testicle - functions as area for sperm maturation and storage - sperm must be mature before active Vas Deferens - answertube that transports sperm from epididymis to urethra Ampulla - answera reservoir in animals that ejaculate rapidly (bulls, stallions, ram, and buck) - found where urethra meets vas deferens - temporary storage depot for sperm prostate gland - answernourish and stimulate activity of sperm -opens into urethra close to opening to bladder vesicular gland (seminal vesicles) - answerneutralize urine residues and stimulate activity of sperm bulbourethral glands (cowpers glands) - answerneutralize urine residues, add volume to ejaculate, form gel in boar semen that plugs cervix in sow -opens into urethra urethra - answerlarge muscular canal from bladder through full length of penis for sperm and urine penis - answerpassageway for sperm and urine glans penis - answerfree end of the penis fibroelastic cavernosum tissue sigmoid flexor - answerwhen s curve streightens to make erection - in bulls, boar, ram cavernosum tissue - answerspongy tissue that fills with blood making the penis rigid and erect in preparation for mating vascular cavernosum tissue no sigmoid flexor - answerstallion, dog retractor muscle - answerbends urethra when not erect boar shape - answercurved to fit in cervix ram shape - answerhas extention of urethra scrotum - answercontains and protects testicle as well as regulates temperature cremaster muscle - answerregulates temperature castration effects - answerno secondary sex characteristics grow slower fatten quickly higher meat quality fewer behavior problems gonadotropin releasing hormone (GnRH) - answerproduced in hypothalamus in brain