Bio Chap 77

  1. What are the 4 Phases of sexual arousal?
    • 1. Excitement Phase
    • 2. Plateau Phase
    • 3. Resolution
    • 4. Refactory Phase
  2. A period of arousal and preparation for intercourse
    The Excitement Phase
  3. The increase in sexual arousal levels off after maintainance of high levels
    The Plateau Phase
  4. This phase follows as arousal decreases and the body returns to its previous state
  5. During this phase, the male is unable to become aroused
    The Refactory Phase
  6. Castration
    The removal of the gonads (testes or ovaries)
  7. A class of hormones responsible for a number of male characteristics
  8. Testosteron
    The major sex hormone in males
  9. A period when the female is ovulating, sex hormone levels are high and the animal is said to be in heat
  10. A class if hormones responsible for a number of female characteristics
  11. Involved in sexual behavior in both sexes as well as aggression and emotion
    Medial amygdala
  12. Quick return to sexual arousal when a new partner is introduced
    Coolidge effect
  13. The area in the hypothalamus involved in male and femal sexual behavior
    Medial preoptic area (MPOA)
  14. A region of the MPOA that is five times larger in males and is involved in male sexual performance
    Sexual-dimorphic mucleus (SDN)
  15. A group of genes that contributes to immune system functioning, and affect odors that are avoided in related individuals
    Major histocompatibility complex (MHC)
  16. Bioactive chemicals released by individuals which change the behavior or physiology of others, such as those involved in sexual attraction in moths and cats
  17. A cluster of receptors in the nasal cavity, detect pheromones. It is present in most mammals
    Vomeronasal organ (VNO)
  18. A neuropeptide that facilitates bonding and milk ejection in animals
  19. Sex
    The set of charactersitics that seperate organisms into male and female
  20. Gender
    The set of behavioral characteristics that correspond to sex
  21. The subjective feeling of belonging to a particular sex
    Gender indentity
  22. Ovaries
    Where the eggs develop
  23. Mullerian inhibiting hormone
    Determines the sex of the fetus
  24. A derivative of testosterone that masculinizes the external genitals
  25. Occurs during sensitive periods of development affecting structures permanently
    Organizing effects
  26. Occurs at any time and can fluctuate, but are reversible if the hormone is removed
    Activating effects
  27. Lordosis
    The term for mounting behavior
  28. Individuals with ambiguous internal and external organs but gonads are consistent with chromosomes
  29. Mullerian inhibiting hormone
    Defeminizes the fetusĀ 
  30. The 23rd pair of chromosomes
    The sex chromosome
  31. A genetic mutation that results in absence of androgen receptors, with feminine appearance and external genitals
    Androgen insensitivity
  32. An enzyme defect in which the adrenal glands produce too much androgen, masculinity of the body
    Congenital adrenal hyperplasia (CAH)
  33. An area in the brain that is smaller in gay men than in heterosexual men
    Third interstital nucleus of the anterior hypothalamus (INAH-3)
  34. An area in the brain that is found to be larger in gay men than in heterosexual men
    Suprachiasmatic nucleus (SCN)
  35. An area in the brain that is larger in gay men which connects the two hemisphere
    Anterior commisure
  36. Believe they were born as the wrong sex
Card Set
Bio Chap 77
Biology Chapter