During the fight reaction, the following effect takes place: 1) dilatation of the pupil. 2) increased motility of the gastrointestinal tract. 3) increased blood flow to the skeleta... During the fight reaction, the following effect takes place: 1) dilatation of the pupil. 2) increased motility of the gastrointestinal tract. 3) increased blood flow to the skeletal muscle. 4) decreased heart rate. Explain parasympathetic stimulation results in what? Discuss stimulation of the vagus nerve. What does stimulation of the oculomotor nerve produce? In Horner's syndrome what is there? What does sympathetic stimulation of the eyes produce? Describe the response mediated by muscarinic receptors.
Understand the Problem
The question is asking for the effects related to autonomic nervous system functions such as parasympathetic and sympathetic stimulation on various bodily responses.
Answer
Fight response: increased skeletal muscle blood flow. Parasympathetic: decreases heart rate, increases gastric activity. Vagus nerve: decreases heart rate. Oculomotor nerve: lens accommodation. Horner’s: ptosis. Sympathetic: pupil dilation. Muscarinic: bronchiolar relaxation.
- Fight response involves increased blood flow to skeletal muscles. 2) Parasympathetic reduces heart rate and increases gastric motility. 3) Vagus nerve decreases heart rate. 4) Oculomotor nerve increases lens power. 5) Horner's syndrome causes ptosis. 6) Sympathetic dilates pupil. 7) Muscarinic receptors relax bronchiolar muscles.
Answer for screen readers
- Fight response involves increased blood flow to skeletal muscles. 2) Parasympathetic reduces heart rate and increases gastric motility. 3) Vagus nerve decreases heart rate. 4) Oculomotor nerve increases lens power. 5) Horner's syndrome causes ptosis. 6) Sympathetic dilates pupil. 7) Muscarinic receptors relax bronchiolar muscles.
More Information
The autonomic nervous system controls involuntary actions. Parasympathetic stimulation is often counter-regulatory to sympathetic stimulation, such as heart rate reduction. The vagus nerve is a major component of the parasympathetic system. Muscarinic receptors, part of the parasympathetic, regulate smooth muscle and glandular activity.
Tips
Confusing sympathetic and parasympathetic effects is common. Remember sympathetic is 'fight or flight'; parasympathetic is 'rest and digest'.
Sources
- Physiology of the Autonomic Nervous System - PMC - pmc.ncbi.nlm.nih.gov
- Autonomic Nervous System - an overview | ScienceDirect Topics - sciencedirect.com
- Introduction to the Autonomic Nervous System (ANS) - TMedWeb - tmedweb.tulane.edu
AI-generated content may contain errors. Please verify critical information
