Podcast
Questions and Answers
What is the state of the pupil if stimulated by parasympathetic nerves?
What is the state of the pupil if stimulated by parasympathetic nerves?
Constricted
What drug paralyzes the ciliary muscle, leading to loss of accommodation?
What drug paralyzes the ciliary muscle, leading to loss of accommodation?
Atropine
What is the term for the state of the lens becoming more convex and accommodation fixed to near vision?
What is the term for the state of the lens becoming more convex and accommodation fixed to near vision?
Spasm of accommodation
The state of the pupil being constricted is known as mydriasis.
The state of the pupil being constricted is known as mydriasis.
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What is the term for the condition where a drug paralyzes the ciliary muscle, leading to loss of accommodation?
What is the term for the condition where a drug paralyzes the ciliary muscle, leading to loss of accommodation?
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What action does acetylcholine (Ach) elicit in skeletal muscles?
What action does acetylcholine (Ach) elicit in skeletal muscles?
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In the presence of atropine, acetylcholine in autonomic ganglia will lead to a decrease in blood pressure.
In the presence of atropine, acetylcholine in autonomic ganglia will lead to a decrease in blood pressure.
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Study Notes
Parasympathetic Nervous System Effects on the Eye
- If parasympathetic nerves are stimulated, the pupil is constricted (active miosis).
- Atropine paralyzes the ciliary muscle, leading to loss of accommodation or cycloplegia.
- Acetylcholine (ACh) causes contraction of the ciliary muscle, allowing the lens to become more convex and the accommodation becomes fixed to near vision (spasm of accommodation).
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Description
Explore how the parasympathetic nervous system influences eye functions. This quiz covers key concepts such as pupil constriction, effects of atropine, and the role of acetylcholine in eye accommodation. Test your understanding of these physiological processes.
