At a stimulation frequency of 15 Hz how many stimuli were there per second? 15 per second RESULTS See Table 4: Measurement of Threshold Stimulus See Graph: Effect of Stimulation Value on Twitch Contraction Force 1. What is the threshold stimulus? The stimulus that is just strong enough to depolarize the membrane to threshold. (400mV) 2.
6. At a stimulation frequency of 15 Hz how many stimuli were there per second? 15 pulses per second RESULTS See Table 4: Measurement of Threshold Stimulus See Graph: Effect of Stimulation Value on Twitch Contraction Force 1. What is the threshold stimulus? 400mV 2.
At a stimulation frequency of 15 Hz how many stimuli were there per second? There were 15 stimuli per second. Results Table 4: Measurement of Threshold Stimulus Force (gf)(Motor neuron 1) 100 mV 0 200 mV 0 Voltage (mV) 300 mV 0 400 mV 0.105 500 mV 0.105 Effect of Stimulation Value on Twitch Contraction Force 1. What is the threshold stimulus? The threshold stimulus is 400 mV.
LABORATORY REPORT Activity: Recruitment and Isotonic and Isometric Contractions Name: Carolyn Chrzastowski Instructor: Professor Waite Date: 07.19.2015 Predictions When the arm goes from resting to flexing, the amplitude and frequency of sEMG spikes will increase During flexion, the amplitude and frequency of sEMG spikes will ___ during extension. be greater than Recruitment of motor units will be greatest when the load is 20 pounds Materials and Methods Comparison of motor unit activation during muscle tone and concentric and eccentric isotonic contractions Dependent Variable amplitude and frequency of sEMG spikes Independent Variable muscle movement Controlled Variables total number of motor units
Did the tidal volume increase, decrease, or not change with exercise? increace with exercise 3. Did the expiratory reserve volume increase, decrease, or not change with exercise? decreased with exercise 4. Did the inspiratory reserve volume increase, decrease, or not change with exercise?
Tidal Volume increases with exercise, which decreases the ERV 2. Explain the change in IRV with exercise. This is the amount of air that can be forcibly inhaled after a normal
BIOS 255 Week 4 Lab: #7 Effect of Exercise on Arterial Pressure and Vascular Resistance LABORATORY REPORT Activity 7: Effect of Exercise on Arterial Pressure and Vascular Resistance Name: Lisa Foley Instructor: Prof. Wiethop Date: January 25th, 2015 PREDICTIONS 1. During exercise: MAP increase 2. During exercise: Vascular resistance increase 3: During exercise: CO increase MATERIALS AND METHODS 1. Dependent Variable: HR, SV, BP 2. Independent Variable: level activity 3.
BIOS 255 Week 4 Lab: #7 Effect of Exercise on Arterial Pressure and Vascular Resistance LABORATORY REPORT Activity 7: Effect of Exercise on Arterial Pressure and Vascular Resistance PREDICTIONS 1. During exercise: MAP will increase 2. During exercise: CO will increase 3: During exercise: SVR will decrease MATERIALS AND METHODS 1. Dependent Variable: heart rate (HR), stroke volume (SV), blood pressure (BP) 2. Independent Variable: level of activity 3.
3. During exercise CO will increase. Materials and Methods 1. Dependent Variable EDV, ESV, and cardiac cycle length 2. Independent Variable level of physical activity(resting or exercise) 3.
Experimental Design Focus question: What is the relationship between strain and time? Hypothesis: The more springs added, the mass will vibrate quicker. The more mass added, the longer it will take to vibrate. Vice versa, the more springs taken away, the longer the mass will take to vibrate. The more mass taken away, the quicker it will vibrate.