Module 2 Lesson 3 - 4

Self-Check

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Now, using what you have learned in this lesson about the hypothalamus, the posterior, and the anterior pituitary, choose who you think is the boss of the endocrine system and provide as much evidence as you can to support your position. You may choose the hypothalamus, the posterior pituitary, anterior pituitary or a combination of these structures. Review the lesson, then complete the following multiple choice questions which will help assess your understanding of the concepts presented in this lesson. Check your answers and discuss any questions that you do not understand with your instructor.

1. Which endocrine gland would be directly responsible for the development of dwarfism or gigantism in humans? 
   
   
   1. Hypothalamus
      
   2. Anterior pituitary
      
   3. Posterior pituitary
      
   4. Thyroid gland
      


2. Which of the following best explains the development of acromegaly in adults? 
   
   
   1. Increased production of TSH
   2. Increased production of ACTH
   3. Increased production of ADH
   4. Increased production of hGH




Use the following information to answer the next question.




The following procedures and observations were used to determine the function of secretions from an animal organ suspected of being an endocrine gland.

The suspected endocrine gland was surgically removed from the animal. Symptoms in the animal were observed. A chemical mixture was extracted from the suspected endocrine gland. The chemical mixture was injected into the animal. Symptoms in the animal were no longer observed. Normal female rats injected with the chemical mixture showed accelerated body growth and increased thyroxine production.



3. Based on these observations, the organ was the 
   
   
   1. Thyroid gland
   2. Posterior pituitary
   3. Hypothalamus
   4. Anterior pituitary



Use the following information to answer the next question.

 


4. Normally inhibition of the pituitary gland would occur if the secretion of Hormone X 
   
   
   1. Increased, causing a decrease in the secretion of Hormone Y
   2. Decreased, causing a decrease in the secretion of Hormone Y
   3. Increased, causing an increase in the secretion of Hormone Y
   4. Decreased, causing an increase in the secretion of Hormone Y