EXSS 380 EXAM 1 UPDATED ACTUAL QUESTIONS AND CORRECT ANSWERS

EXSS 380 EXAM 1 UPDATED ACTUAL QUESTIONS AND
CORRECT ANSWERS

Question:
1. What are the three functions of the nervous system?
Answer:
1. Sensory
2. Integrative
3. Motor

Question:
2. What is the sensory function of the NS?
Answer:
The NS senses changes in the internal and external environment

Question:
3. What is the integrative function of the NS?
Answer:
The NS analyzes data, stores data, and decides which stimuli are important

Question:
4. What is the motor function of the NS?
Answer:
The NS responds to stimuli through muscular contractions or granular secretions

Question:
5. What are the two principle NS divisions?
Answer:
1. Central nervous system (brain and spinal cord)
2. Peripheral nervous system (cranial nerves and spinal nerves)

Question:
6. What are the two divisions of the PNS?
Answer:
1. Autonomic nervous system
2. Somatic nervous system

Question:
7. Describe the autonomic nervous system
Answer:
It's involuntary, its connections are to smooth muscle, cardiac muscle and glands. There are two
subdivisions of motor stimuli: excitatory (sympathetic division) and inhibitory (parasympathetic division)

Question:
8. Describe the somatic nervous system

,Answer:
It's voluntary and reflexive muscle activity. The output it to only skeletal muscle and all motor stimuli are
excitatory

Question:
9. What is the functional unit of the NS?
Answer:
The neuron

Question:
10. What part of the neuron receives input?
Answer:
The dendrite

Question:
11. What part of the neuron relays messages out via terminals?
Answer:
The axon

Question:
12. What's the function of a dendrite?
Answer:
To conduct nerve impulses toward the cell body and relay information from the external environment

Question:
13. What's the function of an axon?
Answer:
To transmit nerve impulses away from the body to other neurons, muscle fibers, or glands. It also
communicates with other cells via the axon terminal

Question:
14. What is the synapse?
Answer:
The junction between neurons and other neurons or effectors (muscle or gland)

Question:
15. What are the chemical messengers that enable neurotransmission?
Answer:
Neurotransmitters

Question:
16. What are the three categories of neurotransmitters?
Answer:
1. Amino acids
2. Neuropeptides
3. Biogenic Amines

, Question:
17. What neurotransmitter is inhibitory and what category does it fall under?
Answer:
GABA which causes hyper polarization and it's amino acids

Question:
18. Name a neuropeptide neurotransmitter
Answer:
Endorphins AKA natural "pain killers"

Question:
19. What are some examples of biogenic amine neurotransmitters?
Answer:
Acetylcholine (ACh) and catecholamines (dopamine, epinephrine, and serotonin)

Question:
20. Which neurotransmitter is involved with the production of smooth movement and Parkinson's disease?
Answer:
Dopamine

Question:
21. Which neurotransmitter is linked with depression and Alzheimer's disease?
Answer:
Serotonin

Question:
22. What is the purpose of a myelin sheath?
Answer:
To increase nerve conduction velocity

Question:
23. What are the Nodes of Ranvier?
Answer:
Narrow gaps in the myelin sheath between Schwann cells. Action potentials "jump" from node to node

Question:
24. What are the three functional classifications of neurons?
Answer:
1. Afferent (sensory) neurons
2. Efferent (motor) neurons
3. Interneurons (association) neurons

Question:
25. What do the afferent neurons do?
Answer:
Transmit impulses from peripheral receptors to the CNS