Module 2 Lesson 1 - 7

Self-Check

Multiple-Choice Items

To refresh your memory on the structure and organization of the endocrine system and the hormones that the endocrine glands produce, complete the following items. Check them before going to your assignment.

1. Maintaining stable conditions in the internal environment of a cell is called 
   
   
   1. positive feedback
   2. homeostasis
   3. reflex loops
   4. tropic control 
      
      
2. The temperature of the body is controlled by 
   
   
   1. negative feedback
   2. positive feedback
   3. tropic hormones
   4. antagonistic hormones 
      
      
3. The three components of a homeostatic mechanism in the body are 
   
   
   1. a stimulus, a sensor, and a response
   2. a receptor, a neural pathway, and a control centre
   3. a sensor, a set point, and a response
   4. a sensor, an effector, and a control centre 
      
      
4. Skeletal growth is promoted by a hormone secreted by the 
   
   
   1. adrenal cortex
   2. adrenal medulla
   3. anterior pituitary
   4. posterior pituitary 
      
      
5. A hormone that regulates glucose levels in the blood and a hormone that regulates sodium ions in the blood (and indirectly, regulates water reabsorption by the kidneys) are, respectively, 
   
   
   1. aldosterone and insulin
   2. glucagon and aldosterone
   3. insulin and antidiuretic hormone
   4. epinephrine and antidiuretic hormone 
      
      
6. During an emergency situation, the adrenal gland is stimulated to release a hormone that directly causes an increase in 
   
   
   1. conversion of glucose to glycogen
   2. insulin levels
   3. thyroxine levels
   4. blood glucose levels




Use the following information to answer the next question.

A tumor of the adrenal medulla is called phenochromocytoma.
This tumor causes hypersecretion of epinephrine and norepinephrine, and several other symptoms.



7.  Possible symptoms of phenochromocytoma include 
   
   
   1. increased heart rate, increased blood glucose, increased metabolic rate
   2. decreased heart rate, increased blood glucose, increased metabolic rate
   3. increased heart rate, decreased blood glucose, decreased metabolic rate
   4. decreased heart rate, decreased blood glucose, decreased metabolic rate 
      
      
8. The release of milk from the breast after the birth of a baby is related to increased levels of 
   
   
   1. estrogen
   2. progesterone
   3. oxytocin
   4. FSH and LH

True/False Statements

Identify each of the statements below as being true or false. If you think the statement is false, change the statement to make it true.

1. The main purpose of the endocrine system is to protect the body. 
   
   
2. Hormones are released into the blood stream. 
   
   
3. Adrenocorticotropic hormone is released by the adrenal glands to control the pituitary gland. 
   
   
4. Positive feedback leads to instability of the internal environment. 
   
   
5. The anterior pituitary releases tropic hormones that were produced by the hypothalamus and stored.