Study Guides (248,412)
Canada (121,545)
Biology (1,112)
BIOL 273L (31)

BIOL273L Lab 2 Study Questions

2 Pages
270 Views
Unlock Document

Department
Biology
Course
BIOL 273L
Professor
Vivian Dayeh
Semester
Winter

Description
Lab #2: Recording Human Nerve Reflexes (iWorx) 1. What is the formula used to calculate the Conduction Velocity in these experiments? • Conduction Velocity (m/sec) = Total path length (mm) / (Mean reflex time (msec) –  0.5msec) • Subtract 0.5msec to account for the synaptic transmission time of the neuromuscular  junction 2. Does the subject’s reflex time change with different stimulus strengths? Why does it or doesn’t it  change? • Reflex time doesn’t change with different stimulus strength because the rate at which an  action potential moves through a neuron only depends on its diameter and whether or not  it’s myelinated  • Since the action potential has the same path length whether it is a light, medium, or  strong stimulus, the reflex time will always be the same 3. Which muscle groups are involved in plantar flexion and in dorsiflexion of the ankle? • Plantar flexion (movement which increases approximate 90 degree angle b/w front part of  foot and shin)  ▯gastrocnemius and soleus • Dorsiflexion: movement which decreases angle b/w dorsum of the foot and the leg  bringing toes closer to the shin  ▯tibialis anterior 4. How does temporal summation in a neuron differ from spatial summation? • Temporal summation occurs when two graded potentials from one presynaptic neuron  occur close together in time and summate (create graded potential larger than either one  alone) to create an action potential • Spatial summation occ
More Less

Related notes for BIOL 273L

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit