D574 WGU EXAM

1. What is the primary function of motor neurons?

A. They carry signals from the central nervous system to muscles or glands, causing them to act. (Correct)

B. They form the blood-brain barrier and regulate the passage of substances.

C. They transmit sensory information from the sensory organs to the brain.

D. They are involved in digestion and absorption.

2. Which biological psychology concept explains automatic adjustment of internal state?

A. Neuroplasticity

B. Neurotransmitter reuptake

C. Cognitive dissonance

D. Homeostasis (Correct)

3. What happens if sodium channels are blocked?

A. Threshold easier to reach

B. Prevent the action potential from occurring (Correct)

C. Skip depolarization

D. Increase speed

4. How do antiepileptic drugs reduce seizures?

A. Increase excitatory neurotransmitters

B. Degrade myelin

C. Block receptors for excitatory neurotransmitters (Correct)

D. Enhance inhibitory reuptake

5. Which system decreases heart rate and breathing?

A. Parasympathetic nervous system (Correct)

B. Somatic nervous system

C. Sympathetic nervous system

D. Central nervous system

6. Which communicates with body muscles (not head)?

A. White matter

B. Ganglion

C. Spinal cord (Correct)

D. Nucleus

7. Which brain part controls movement?

A. Nucleus basalis

B. Hippocampus

C. Thalamus

D. Cerebellum (Correct)

8. Which lobe processes auditory information?

A. Parietal

B. Temporal (Correct)

C. Occipital

D. Frontal

9. Which processes smell first?

A. Hypothalamus

B. Cerebellum

C. Olfactory bulb (Correct)

D. Pons

10. Which lobe processes visual info?

A. Frontal

B. Temporal

C. Occipital (Correct)

D. Parietal

11. Small ganglion cells in retina?

A. Koniocellular neurons (Correct)

B. Bipolar

C. Horizontal

D. Amacrine

12. Hippocampus damage causes difficulty with:

A. Breathing

B. Temperature

C. Forming new memories (Correct)

D. Balance

13. Blood-brain barrier function?

A. Transport oxygen

B. Selectively allow/block substances (Correct)

C. Stop blood flow

D. Unrestricted exchange

14. Cerebellum function?

A. Autonomic control

B. Coordinates movement (Correct)

C. Emotion

D. Vision

15. Hypothalamus–pituitary relationship?

A. Hypothalamus signals pituitary to release hormones (Correct)

B. Pituitary controls hypothalamus

C. Independent

D. Hypothalamus produces all hormones

16. Visualizing colors uses which lobe?

A. Frontal

B. Temporal

C. Parietal

D. Occipital (Correct)

17. Light used to control neurons?

A. PET

B. Optogenetics (Correct)

C. CT

D. MRI

18. PTSD hyperactive structure?

A. Amygdala (Correct)

B. Basal ganglia

C. Cerebellum

D. Corpus callosum

19. Glial cells protecting neurons?

A. Astrocytes (Correct)

B. Schwann

C. Oligodendrocytes

D. Radial glia

20. Measure brain activity (drug study)?

A. fMRI (Correct)

B. WBC count

C. Hormones

D. Electrolytes

21. Real-time brain activity method?

A. Case study

B. Archival

C. Survey

D. fMRI (Correct)