30 Questions
What is the role of nitric oxide in the male sexual response?
Activates soluble guanylate cyclase
What is the effect of cGMP on blood vessels in the penis?
Vasodilation
Which muscle is responsible for pushing semen from the base of the penis to the urethral opening during ejaculation?
Bulbospongiosus
What is the primary role of testosterone in male sexual response?
Increasing libido
What is the function of Viagra in male sexual response?
Inhibiting cGMP specific phosphodiesterase
Which term refers to behaviors and signals in females that serve to attract males?
Attractivity
What are the three stages of male reproductive behavior?
Precopulatory, Copulatory, Postcopulatory
When does sexual receptivity occur in females?
Only during estrus
What is the male behavior that involves penile erection and protrusion?
Mounting
What is required for successful reproductive behavior?
Mature ovum and proper organ function
Which system is activated by erotic thoughts or physical stimulation in males?
Parasympathetic system
What initiates increased production of nitric oxide in males during sexual response?
Erotic thoughts or physical stimulation
What is the main difference between the copulatory patterns of a bull, billy goat, and ram compared to other species mentioned?
They have a fibroelastic penis and small volume of semen.
Which species has the ability to copulate 3 to 4 times in a day but easily gets satiated?
Boar
What is unique about the copulatory patterns of a mating pair compared to other species?
They have a prolonged copulation duration.
In terms of volume of ejaculate, which species has a range of 0.8-1mL?
Boar
Which species has a fibroelastic penis with a vascular structure and accordingly engages in prolonged copulation?
Bull
What is characteristic of the external cervical Os in terms of number of ejaculations to satiation?
It takes 30-40 ejaculations to reach satiation.
What is the purpose of releasing acrosomal enzymes during the acrosomal reaction?
To create pores in the zona pellucida
What happens when the plasma membrane overlying the acrosomal membrane fuses with the outer acrosomal membrane?
Vesiculation to create pores
What is required for fertilization to occur?
Fusion of equatorial segment and oocyte plasma membrane
What is the role of fusion proteins during sperm-oocyte fusion?
Facilitating fusion between equatorial segment and oocyte plasma membrane
After completely penetrating the zona, where do sperm reach before fusion with the oocyte plasma membrane?
Perivitelline space
What happens to vesicles after the acrosomal reaction is complete?
Sloughed off
What is the purpose of cornual insemination in cows?
Minimize cervical deposition
In the artificial insemination technique in mares, what is used to gauge the depth of insemination?
Marker
In sow artificial insemination, why is a high volume of radiopaque contrast medium necessary?
To mimic the inseminant distribution in uterine horns
What is the role of the index finger in mare artificial insemination?
Guide the insemination pipette into the cervical lumen
What is the design purpose of the spiral tip in the artificial insemination pipette for sows?
Penetrate the interdigitating prominences of the cervix
What is the volume of inseminate deposited in both uterine horns during cornual insemination?
0.5-mL in each horn
This quiz covers the concepts of reproductive behaviour in the context of endocrinology and reproductive physiology. It includes information on precopulatory, copulatory, and postcopulatory stages, sexual receptivity during estrus, mating posture, and physiological compatibility for successful reproduction.
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