24 Questions
What is the primary hormone responsible for the development and expression of sexual behavior in male animals?
Testosterone
Which hormone stimulates the growth and maturation of the uterine lining in preparation for pregnancy?
Estrogen
What is the period of time during which an animal is not receptive to mating?
Refractory Period
Which hormone increases sexual desire and aggression in animals?
Testosterone
What is the term for the display of sexual behavior in animals?
Lordosis
Which hormone plays a crucial role in the regulation of the menstrual cycle?
Progesterone
What is the term for the behavior displayed by males during courtship?
Flehmen Face
What is the term for controlled breeding programs for animals?
Breeding Programs
What is the primary focus of reproductive behavior in animals?
Finding and attracting a suitable mate
During which stage of reproductive behavior do animals exhibit physical and social interactions?
Courtship
What is the term for the period of time after mating when an animal is not receptive to further mating?
Refractory period
What is the primary function of oxytocin from the posterior pituitary during the emission phase of ejaculation?
Stimulation of the accessory gland fluid release
What drives an animal's desire to engage in reproductive behavior?
Sexual motivation
What is the term for the physiological changes that occur in an animal in preparation for mating?
Endocrine effects
Which of the following best describes the refractory period in male animals?
The time period between ejaculation and the next erection
What is the primary goal of breeding programs in animals?
To produce offspring with desired traits
What is the primary motivator for sexual behavior in male animals?
The presence of a receptive female
During which week of the course schedule is the topic of reproductive failure covered?
Week 9
Which of the following is an example of postcopulatory behavior in male animals?
Search for a new mate
What percentage of the final grade is the final exam worth?
40%
What is the role of vasodilatation during erection?
Decrease blood pressure
Which of the following breeding programs would benefit from an understanding of male copulatory behavior?
Natural service breeding
What is the primary endocrine effect of oxytocin during ejaculation?
Release of accessory gland fluid
Which of the following is a characteristic of sustained copulators?
Ejaculation in 5-20 minutes
Study Notes
Endocrine Effects on Sexual Behavior
- Hormones play a crucial role in regulating sexual behavior in animals by controlling physiological and psychological aspects of mating and reproduction.
- Testosterone, produced by the testes, promotes the development of secondary sexual characteristics in males, such as increased muscle mass, body hair, and deepening of the voice.
- Testosterone also stimulates the production of sperm and increases sexual desire and aggression in males.
- Estrogen, produced by the ovaries, promotes the development of secondary sexual characteristics in females, such as breast development and widening of the hips.
- Estrogen also stimulates the growth and maturation of the uterine lining in preparation for pregnancy.
Copulatory Behavior
- Male copulatory behavior involves erection, mounting, intromission, and ejaculation.
- There are three types of copulators: short copulators (1-3 seconds), sustained copulators (5-20 minutes), and intermediate copulators (20-60 seconds).
- Examples of short copulators include bulls, rams, and boars, while stallions are sustained copulators.
Erection, Emission, and Ejaculation
- Erection involves vasodilatation, relaxation of the retractor penis muscle, and contraction of the cauda epididymis and vas deferens.
- Emission involves the release of accessory gland fluid and is triggered by oxytocin from the posterior pituitary and sympathetic neurons.
- Ejaculation involves the contraction of smooth and striated muscles.
Female Copulatory Behavior
- Female copulatory behavior involves receptivity and estrus detection, leading to mating with a male.
- Estrus pattern and estrus detection are important aspects of female copulatory behavior.
Postcopulatory Behavior
- Postcopulatory behavior in males refers to the behaviors exhibited after mating has occurred.
Reproductive Behavior
- Reproductive behavior involves a series of stages, including attraction, courtship, mating, and post-copulatory behaviors.
- Reproductive behavior varies widely between different species of animals and even between different individuals within the same species.
Explore how hormones regulate sexual behavior in animals, including the role of testosterone in development and expression of mating and reproduction.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
