Goals: 1. To become familiar with reflex circuitry in the nervous system 2. To u

Question

Goals: 1. To become familiar with reflex circuitry in the nervous system 2. To understand the effect of sensory stimuli on efferent output 3. To become familiar with designing, executing, and communicating a scientific research project The autonomic nervous system (ANS) is part of the peripheral nervous system. Its goal is to maintain homeostasis of the visceral organs. In this lab we w examine the mammalian diving reflex, which the ANS. In mammals, submerging the face in water initiates several physiological responses that involves maximize the time that can be spent under water. This includes a reduction of heart rate (bradycardia). The reflex arc is as follows: the trigeminal nerve (CN5) of your face, nose, and mouth senses the cold temperature of the water, relays this information to the brainstem, which then sends parasympathetic efferent instructions to the heart via vagus nerve (CN10). In humans, mild bradycardia is also caused by breath-holding without submersion. The physiological goals of the diving reflex are to reduce the energetically costly aerobic activity of the heart. General Instructions: Work in groups of 4-6. Come prepared to dive your face; all students must participate. Please limit your stimulant use in the hour prior to class (eg. caffeine). Design an experiment to test the diving reflex. At your disposal you have pulse oxymeters (to measure heart rate), snorkel masks, snorkels, buckets, and different temperatures of water. All individuals in your group will dive twice, once for the control and once for the treatment (alternate the order and rest in between dives). Dive lengths are 40 seconds long. If one or more members of your group cannot hold their breath for 40 seconds, all members of the group should use a snorkel. Record the heart rate at the 40 second mark, immediately before you tell the student that time is up. Write up one formal lab report lab report found near the start of this manual. You are welcome to analyze the statistics together with me on the class computer. for your group. Follow instructions for writing a formal Pre-lab: (7 points) Make a mind map for the structure and function Autonomic Nervous System.

Explanation / Answer

The structure of Autonomic nervous system

1) Spinal cord ----------------2) Autonomic motor neurons (sympathetic preganglionic neuron) ----------3)Autonomic ganglion--------4) Autonomic motor neurons (sympathetic postganglionic neuron)---------------5)Effector organs

Function of ANS

1) Sympathetic : Fight and Flight

2) Parasympathetic : Rest

Related Questions

Navigate

• Browse (All)
• Browse G
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.