In the Shells lab‚ we were to test the effect of pH on shell strength. The independent variable in this experiment is the type of liquid that we put the shell in and the independent variable is the shells’ strength. The first thing we did was get our materials and label the two shells. The shell that was going into the vinegar was labeled “E” (which stands for experimental) and the shell that was going to be put in the salt water was labeled “C” (which stands for control since it is the control of
Premium Water Chemistry Carbon dioxide
A LAB REPORT TO INVESTIGATE THE FACTORS AFFECTING THE STRENGTH OF AN ELECTROMAGNET Date: 11th March‚ 2011 IB Topic: 6.3.2 Assessment criteria * Design (D) Aspect | Marks Awarded | Defining the problem and selecting variables | | Controlling Variables | | Developing a method for collection of data | | Total | | Aim: To study the effect of spacing of the coils on the strength of an electromagnet Apparatus Required: * An iron nail (around 8 cm) * A copper wire
Premium Magnetic field
2: Physiology Lab Skeletal Muscle Physiology Student Name: Lab Summary Worksheet Directions: Read the following directions before starting the lab. Before starting each lab Activity‚ read the Overview and Introduction. This information will help you understand what you are doing in the lab. You do not have to pdf your lab – the only thing that you will submit for grading is this lab report. You will have to answer the Stop and Think Questions that are embedded in the lab instructions
Free Muscle contraction Muscle Muscular system
workload doubles. The muscles can hold a higher workload if they originally have a higher threshold of stimulation with no workload at all. 2. Why would a muscle’s threshold of stimulation change as its Workload changes? A muscle’s threshold of stimulation changes as its workload changes because the muscle needs more stimulation and more power to contract. 3. Which muscles were able to contract under the greatest loads? What does this suggest about the role these muscles play in frog movement
Premium Hypothesis Frog Observation
Lab Report The Effect of Resting on Clothespin Squeezing. Hypothesis: If you rest then the clothespin squeezing rate will increase. Materials:- Clothespin Clock Sneakers Procedure: Separate class into two groups (exercisers and resters). Exercisers will do jumping jacks for a minute. Exercisers and registers will squeeze clothespin for a minute Repeat steps two and three. Total of three trails. Precaution: Shoes must be tied. Space between exercisers. Healthy exercisers
Premium Exercise Physical exercise Muscle
threshold of stimulation will increase by 1. The muscles that have a higher threshold of stimulation can take on a high workload if it originally had no workload. 2. . Why would a muscle’s threshold of stimulation change as its Workload changes? The muscle will need a higher stimulation and work harder to be able to contract. 3. Which muscles were able to contract under the greatest loads? What does this suggest about the role these muscles play in frog movement? The thigh and calf contracted
Premium Hypothesis Frog Observation
Lab 6 Biomechanics of Frog Skeletal Muscle I. Purpose This exercise is designed to demonstrate some mechanical and physiological properties of skeletal muscle using the gastrocnemius muscle of a frog. II. Performance Objectives At the end of this exercise the student should be able to: 1. Define minimal (threshold)‚ subminimal‚ maximal‚ and supramaximal stimulus. 2. Explain what is meant by a “graded” response. 3. Draw a diagram of the setup used in this lab exercise. 4. Calculate the
Premium Muscle contraction Muscle Muscular system
Tensile Strength Report | Materials in Practice CP4088/CP8011 | By Clinton Chang | Synopsis This experiment is to find out the tensile strength of different plastic materials. The four plastic materials used are General Purpose Polystyrene (GPPS)‚ High Impact Polystyrene (HIPS)‚ High Density Polyethylene (HDPE) and Polypropylene (PP). By using three samples from each plastic material type‚ we are able to obtain the mean tensile strength‚ mean tensile modulus and mean yield strength of each
Premium Tensile strength Plastic Elasticity
Strength Training Concepts in Rehabilitation Muscle Physiology Physiological changes of training Testing - Evaluation Strength training concepts Return to function - Core Muscles Muscle Physiology Muscle Structure Fiber Type Muscle Contraction Energy Systems Force of Contraction Physiologic changes of training Skeletal Muscle Structure Motor Unit Mitochondria produce energy ATP Sarcolemma muscle fibers membrane Sarcomere contractile unit of
Premium Muscle Adenosine triphosphate Myosin
Nervous System lab was designed to measure reaction times by using a variety of tests that affect the heart rate. These tests were the startle‚ stroop‚ Valsalva maneuver‚ diving reflex‚ and a test of our choice. The test our group chose to measure the heart rate in response to doing a trust fall to anticipate the stress right before the fall. To begin this lab we chose a participant‚ and then hooked their finger up to the pulse transducer sensor. Using the chart 5 program on the lab computer the participant’s
Premium Parasympathetic nervous system Autonomic nervous system Peripheral nervous system