Multiple Choice and Conceptual Actual
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1. ______________ is the study of drugs that alter processes controlled by the
nervous system.
- ANSWER Neuropharmacology
2. The Peripheral Nervous System (PNS) is divided into what two subdivisions? -
ANSWER
• Somatic Motor System → controls voluntary movement
• Autonomic Nervous System (ANS) → involuntary regulation
3. The Autonomic Nervous System is further divided into what two systems? -
ANSWER
• Parasympathetic Nervous System (PNS) → “Rest & Digest”
• Sympathetic Nervous System (SNS) → “Fight or Flight”
,4. What does the Somatic Motor System control?
- ANSWER Voluntary movement of skeletal muscles
5. What does the Autonomic Nervous System regulate? - ANSWER
• Heart
• Secretory glands (salivary, gastric, sweat, bronchial)
• Smooth muscle (bronchi, blood vessels, GI, urogenital tract)
6. Functions of the Parasympathetic Nervous System (“Rest & Digest”): -
ANSWER
• ↑ GI secretion, urination, defecation
• Miosis (pupil constriction) → near vision
• Bronchoconstriction
• Slows heart rate
7. Functions of the Sympathetic Nervous System (“Fight or Flight”): - ANSWER
• ↑ HR, cardiac output, BP (via vasoconstriction)
• Blood flow shunted to skeletal muscles
• Bronchodilation
• Mydriasis (pupil dilation)
• Mobilizes stored energy (glucose & fatty acids)
8. Autonomic regulation of the heart: - ANSWER
, • SNS → increases HR
• PNS → decreases HR
9. Autonomic regulation of male GU system: - ANSWER
• Parasympathetic → erection
• Sympathetic → ejaculation
10. Neurotransmitters of the Peripheral Nervous System:
- ANSWER . Acetylcholine (ACh)
• Norepinephrine (NE)
• Epinephrine (Epi)
11. Function of Acetylcholine (ACh): - ANSWER
• Released at most PNS junctions
• Activates cholinergic receptors
12. Function of Norepinephrine (NE): - ANSWER
• Released by most postganglionic SNS neurons
• Exception: sweat glands (release ACh)
13. Function of Epinephrine (Epi): - ANSWER
• Major transmitter from adrenal medulla
• Also releases some norepinephrine
, 14. Receptor types of the PNS: - ANSWER
• Cholinergic receptors (respond to ACh → parasympathetic)
• Adrenergic receptors (respond to Epi & NE → sympathetic)
15. Types of Cholinergic receptors: - ANSWER
• Nicotinic N (neuronal → ganglia, adrenal medulla)
• Nicotinic M (muscle → skeletal muscle contraction)
• Muscarinic (organs → parasympathetic responses)
16. Functions of Nicotinic receptors: - ANSWER
• Nicotinic N → promotes ganglionic transmission & epinephrine release
• Nicotinic M → skeletal muscle contraction
17. Functions of Muscarinic receptors: - ANSWER
• ↑ Secretions (pulmonary, GI, sweat)
• Pupil constriction (miosis), near vision
• Vasodilation → ↓ BP
• Slow HR
• Urination & defecation
18. Function of Adrenergic receptors:
- ANSWER Mediate responses to Epi & NE at sympathetic junctions