If you wanted to increase the initial performance of female rats on a radial maz
ID: 252721 • Letter: I
Question
If you wanted to increase the initial performance of female rats on a radial maze, what hormone could you treat it with early in development? Select one a. Progesterone o b. Testosterone c. Cortisol d. DHT What type of gonads would develop in a chromosomally XX fetus that was exposed high levels of testosterone prenatally? Select one: a. Testes b. Ovaries C. An ovary and a testis d. Gonads that contain both testicular and ovarlan tissue (ovotestes) Which of the following rats is likely to have the larger SDN-POA? Select one: a. Male rats that were castrated in early development and that show female copulatory behaviors in adulthood b. Female rats that were not exposed to high levels of testosterone in early development and that show female copulatory behaviors in adulthood c. Female rats that were exposed to high levels of testosterone in early development and that show male copulatory behaviors in adulthood d. The size of the SDN-POA should be similar in A, B and C. o A chromosoma etus has a ?mpletely unctional SR GENITALIA will this fetus develop? gene and develops normal te es a produce both estos rone an M : however, he e sa so has com e an en n ensin syndrome hatt peor Select one a. Clitoris and labia b. Intersex genitalia c. Penis and scrotumExplanation / Answer
Answer:
(1). If you wanted to increase the initial performance of female rats on a radial maze, progesterone is the hormone which is used to treat with early in development. This is because, progesterone improves learning and memory in tasks mediated by the prefrontal cortex of rats.
Hence, option (a) is correct answer.
(2). Ovaries are the type of gonads that would develop in chromosomally XX fetus that was exposed high levels of testosterone prenatally.
Hence, option (b) is correct answer.
(3). Larger SDN-POA is present in female rats that was exposed to high levels of testosterone in early development and that show male copulatory behaviors in adulthood.
Hence, option (c) is correct answer.
(4). A chromosomally XY fetus has a completely functional SRY gene and develops normal testes that produce both testosterone and MIS; however, the fetus also has complete androgen insensitivity syndrome. Female GENITALIA will develop in the fetus.
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