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Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332

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BuyFindarrow_forward

Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332
Textbook Problem
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A pregnancy test detects _________ in the urine.

  1. a. lysozyme
  2. b. prolactin
  3. c. oxytocin
  4. d. human chorionic gonadotropin

Summary Introduction

Concept introduction: Pregnancy tests are designed to test if the human female is pregnant or not. The test is based on the hormone, human chorionic gonadotropin (which is released only at the time of pregnancy).

Explanation

Reasons for the correct statement:

Once the blastocyst is implanted in the uterus, chorion is formed from the outermost layer of the blastocyst. The chorion produces the human chorionic gonadotropin that helps to sustain the corpus luteum. Corpus luteum produces the pregnancy hormone, progesterone. The urine of the pregnant female or a female who shows the symptoms of being pregnant is tested for human chorionic gonadotropin as it is the only hormone released during pregnancy.

 Option d. is given as “human chorionic gonadotropin”

As human chorionic gonadotropin is detected in the urine during pregnancy test, option d. is correct.

Reasons for the incorrect statements:

Option a. is given as “lysozyme”...

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