Unit 3- Online Lab 2- Muscle Lab

Introduction: The purpose of this lab is to observe the muscles contracting before temperatures and fatigue and then to observe them once they are cold or fatigued to see the difference. Also this lab will help to recognize how the muscles are at resting and once contracted.

The supplies for this lab are:
bowl of water
ice or snow
timer or watch
paper
rubber ball or clothespin

This is a picture of my supplies:

This is a picture of my hand in the freeing cold water! You can't see it throbbing, but I felt it!!! :)

Temperature------ Number of Fists
Normal----------- 36

Ice Water--------- 22


Trial ----- # of Squeezes in 20 seconds

1------------ 40
2------------ 39
3------------ 36
4------------ 35

5------------ 32
6------------ 29
7------------ 30
8------------ 27

9------------ 26
10----------- 24



1. The three changes I noticed when my muscles were contracted were my muscle getting fatigued, it became shorter and stuck out a little bit more or bulged.

2. The cold water made my hand throb and caused my muscles to slow down, I was unable to clench my fist as many times as before putting my hand in the cold water.

3. The fatigue of my hand made it slower to clench my fist and to clench the ball.