Question

In: Anatomy and Physiology

List the pathway from stimulus to response for each of the following. A. Stimulus – Stubbed...

List the pathway from stimulus to response for each of the following.

A. Stimulus – Stubbed your toe

Response – Hop on one foot

B. Stimulus – Hit biceps tendon

Response – Elbow flexion

C. Stimulus – Smell fresh baked bread

Response : Increased thin watery saliva

Expert Solution

A. 1.stimulus-stubbed your toe

2.nociceptor or pain receptor activated

3.afferent pain fibre(peripheral nerve)

4.dorsal root ganglion

5.dorsal root

6.synapse

7.lateral spinothalamic tract

8.reticular formation in mid brain

9.thalamus(sensory relay center)

10.hypothalamus and limbic system(stress response)

11.efferent fibres to effector muscles

12.flexion of affected leg

13.response-hop on one foot

B. stimulus -hit biceps tendon

Afferent nerve from tendon
Dorsal root ganglion
Synapse in spinal cord
excitatory alpha motor neuron to biceps muscle
Inhibitory interneuron to antagonist muscle I.e extensors
Efferent nerve fibres
Flexion at elbow joint

Response-elbow flexion

C. stimulus-smell fresh baked bread

Olfactory receptors in olfactory epithelium
Olfactory cell
Olfactory nerve
Cribriform plate
Olfactory bulb
Mitral and tufted cells
Anterior olfactory nucleus
Primary olfactory cortex(including prepiriform cortex and olfactory tubercle)
Endopiriform nucleus
Inferior salivatory nucleus
Tympanic branch of IX cranial nerve
Tympanic plexus
Lesser petrosal nerve
Otic ganglion
Auriculotemporal nerve
Parotid gland

Response-increased thin watery saliva

Sydney Mullin answered 6 months ago

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