Other
Exercise 3: Neurophysiology of Nerve Impulses Activity 2: Receptor Potential
- Course
- Institution
PhysioEx Exercise 3 Activity 2 Exercise 3: Neurophysiology of Nerve Impulses Activity 2: Receptor Potential
[Show more]
Seller
Follow
MaximGh
Reviews received
Content preview
26-5-2021 PhysioEx Exercise 3 Activity 2PhysioEx Lab Report
Exercise 3: Neurophysiology of Nerve Impulses
Activity 2: Receptor Potential
Name:
Date:
Session ID:
Pre-lab Quiz Results
You scored 75% by answering 3 out of 4 questions correctly.
1 Assuming that the resting potential of a sensory neuron is -70 mV, which of the following represents a
depolarization?
You correctly answered: a change to -60 mV.
2 Which of the following is a sensory modality (type of sense)?
You correctly answered: all of the above.
3 Which of the following is a sensory stimulus?
You correctly answered: all of the above.
4 Which of the following is true of the response of a sensory neuron to the appropriate sensory
stimulus?
Your answer: It can be called a receptor potential, and it is a graded potential.
Correct answer: Both of the above.
Experiment Results
Predict Questions
1 Predict Question 1: The adequate stimulus for a Pacinian corpuscle is pressure or vibration on the
skin. Which of the following modalities will induce the largest amplitude receptor potential in the
Pacinian corpuscle?
Your answer: moderate-intensity pressure.
2 Predict Question 2: The adequate stimuli for olfactory receptors are chemicals, typically odorant
molecules. Which of the following modalities will induce the largest amplitude receptor potential in
the olfactory receptor?
Your answer: moderate-intensity chemical.
Stop & Think Questions
1 Why didn't the Pacinian corpuscle respond to high-intensity light?
You correctly answered: Light-transducing proteins are not present in the Pacinian corpuscle.
https://media.pearsoncmg.com/bc/bc_0media_ap/physioex/10/ex3/act2/ 1/6
, 26-5-2021 PhysioEx Exercise 3 Activity 2
2 Judging from these results, does light have a smell?
You correctly answered: No.
3 Why did the free nerve ending respond to several different modalities?
You correctly answered: The sensory end of this nerve is less specialized.
Experiment Data
Receptor Modality Intensity Resting Peak Value of Amplitude of
Potential Response Response
(mV) (mV) (mV)
Pacinian
--- --- -70 -70 0
corpuscle
Pacinian
Pressure Low -70 -60 10
corpuscle
Pacinian
Pressure Moderate -70 -45 25
corpuscle
Pacinian
Pressure High -70 -30 40
corpuscle
Pacinian
Chemical Low -70 -70 0
corpuscle
Pacinian
Chemical Moderate -70 -70 0
corpuscle
Pacinian
Chemical High -70 -70 0
corpuscle
Pacinian
Heat Low -70 -70 0
corpuscle
Pacinian
Heat Moderate -70 -70 0
corpuscle
Pacinian
Heat High -70 -70 0
corpuscle
Pacinian
Light Low -70 -70 0
corpuscle
Pacinian
Light Moderate -70 -70 0
corpuscle
Pacinian
Light High -70 -70 0
corpuscle
Olfactory
--- --- -70 -70 0
receptor
Olfactory
Pressure Low -70 -70 0
receptor
https://media.pearsoncmg.com/bc/bc_0media_ap/physioex/10/ex3/act2/ 2/6
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller MaximGh. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $3.40. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
79751 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now