PSYCH CHAPTER 3

1. A(n) ________ is a sudden, permanent change in a sequence of DNA. 

d. Mutation

 2. ________ refers to a person’s genetic makeup, while ________ refers to a person’s physical characteristics. 

b. Genotype; phenotype 

3. ________ is the field of study that focuses on genes and their expression. 

c. Epigenetics 

4. Humans have ________ pairs of chromosomes. 

b. 23 

5. The ________ receive(s) incoming signals from other neurons. 

d. dendrites 

6. A(n) ________ facilitates or mimics the activity of a given neurotransmitter system. 

c. agonist 

7. Multiple sclerosis involves a breakdown of the ________. 

b. myelin sheath 

8. An action potential involves Na + moving ________ the cell and K + moving ________ the cell. 

a. inside; outside 

9. Our ability to make our legs move as we walk across the room is controlled by the ________ nervous system. 

b. somatic 

10. If your ________ is activated, you will feel relatively at ease. 

c. parasympathetic nervous system 

11. The central nervous system is comprised of ________. 

d. brain and spinal cord 

12. Sympathetic activation is associated with ________. 

d. both A and C 

13. The ________ is a sensory relay station where all sensory information, except for smell, goes before being sent to other areas of the brain for further processing. 

d. thalamus 

14. Damage to the ________ disrupts one’s ability to comprehend language, but it leaves one’s ability to produce words intact. 

c. Wernicke’s Area 

15. A(n) ________ uses magnetic fields to create pictures of a given tissue. 

b. MRI 

16. Which of the following is not a structure of the forebrain? 

d. substantia nigra

17. The two major hormones secreted from the pancreas are: 

d. glucagon and insulin 

18. The ________ secretes messenger hormones that direct the function of the rest of the endocrine glands. 

c. pituitary 

19. The ________ gland secretes epinephrine. 

a. adrenal 

20. The ________ secretes hormones that regulate the body’s fluid levels. 

b. pituitary