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BIOLOGY 305 LAB COMPARATIVE ANIMAL PHYSIOLOGY. Lab 2: Stimulus Response Pathways Reaction Times & Reflexes. ANNOUNCEMENTS. Carbon Copy Notebooks: Required for lab NEXT week: Buy at UMBC bookstore or ONLINE Bring to lab EVERY week!. ANNOUNCEMENTS. Lab Exercises:

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biology 305 lab comparative animal physiology

BIOLOGY 305 LABCOMPARATIVE ANIMAL PHYSIOLOGY

Lab 2: Stimulus Response Pathways

Reaction Times & Reflexes

announcements
ANNOUNCEMENTS

Carbon Copy Notebooks:

  • Required for lab NEXT week:
      • Buy at UMBC bookstore or ONLINE
      • Bring to lab EVERY week!
announcements3
ANNOUNCEMENTS

Lab Exercises:

  • Usually available Friday afternoon online
  • Print out and bring to lab with you!
announcements4
ANNOUNCEMENTS

Lab Quizzes:

  • First quiz in lab NEXT week!
  • ½ material from previous lab, ½ from future lab
  • Based on lab exercises and lab leadoff
announcements5
ANNOUNCEMENTS

Lab Practical EXAM:

  • Week after NEXT!
  • Open lab hours begin NEXT week and schedule will be posted on course web page
  • Based on Exercise #1: Tutorial
announcements6
ANNOUNCEMENTS

CLICKERS:

  • Bring Pads to EVERY Leadoff
  • You may miss ONE without penalty
  • In class, press any button to turn clicker ON
    • Set Channel to 41
      • Press “Ch” button, enter 41 and then “Ch” button again
announcements7
ANNOUNCEMENTS

Assignment #1:Animal Care & Use Report:

  • Justify use of animals in TEACHING laboratories
        • Focus on use of animals in education & teaching
        • NOT research!
  • Due AS YOU WALK IN THE DOOR to lab
        • Submit ELECTRONICALLY before lab
          • Submit through Blackboard (Safe Assign)
          • Instructions for electronic submission on course web site
        • Bring a printed (hard copy) of paper to lab
        • NO late submissions (hard copy or electronic) accepted
announcements8
ANNOUNCEMENTS

Assignment #1: Animal Care & Use Report:

  • Minimum of 2 DIFFERENT scientific references
  • Citations:
      • In TEXT and full bibliography at end of paper
      • In text citations after every SENTENCE!!!
      • Proper citation FORMAT (link) on course web page
      • Follow link on course web page to avoid plagiarism
  • Spelling, grammar & organization COUNT!
this week in lab instrumentation
THIS WEEK IN LAB:INSTRUMENTATION

Exercise 1:

  • Use of the pulsetransducer to indirectly measureheart rate (HR)
this week in lab instrumentation10
THIS WEEK IN LAB: INSTRUMENTATION

Exercise 1: The Pulse Transducer

  • What is a Pulse Transducer?
  • Important Concepts:
    • Flow of Information
    • Analog vs. Digital signals
    • Sampling Frequency
    • Aliasing
this week in lab instrumentation11
THIS WEEK IN LAB: INSTRUMENTATION

Exercise 1: The Pulse Transducer

  • The Output: TRACE
    • Amplitude
    • Frequency
    • Period
slide12

Integrators

(CNS)

Stimulus Response Pathways Often Include:

A. P.

E.P.

Receptor

Effectors

INPUT/stimulus

OUTPUT/Response

this week reaction times
THIS WEEK: REACTION TIMES

Stimulus Response Pathways:

  • Begin with a Stimulus:
  • End with a Response:
this week stimulus response pathways
THISWEEK:STIMULUS RESPONSE PATHWAYS

Stimulus Response Pathways:

  • Neurons:
reaction times
REACTION TIMES
  • Instruments:
    • iWorx Unit
    • Pulse Transducer
    • Event Marker
reaction times16
REACTION TIMES

Audio Stimuli:

1. Stimulus Applied

2. Subject Hears Stimulus

3. Subject

Responds

To Stimulus

reaction times17
REACTION TIMES

Visual Stimuli:

1.Stimulus Applied

2. Stimulus Appears

On The Computer

3.Subject

SeesStimulus On Computer

4. Subject Responds

reaction times18
REACTION TIMES

Some Factors That May Contribute To

Response Times:

this week reflexes
THIS WEEK: REFLEXES

Stimulus–Response

Pathways:

  • Reflexes are the most simple

“ In its simplest form, a reflex produces a stereotypical response to a particular sensory stimulus” (Randal et. al 2002)

reflexes
REFLEXES

Reflexes:

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