Muscle Tissue Report
Organization of Muscle Tissue
Laszlo Vass, Ed.D.
Version 42-0016-00-01
Lab Report Assistant
This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions, diagrams if needed, and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing this information in an editable file which can be sent to an instructor.
Purpose:
● What is the purpose of this exercise?
● Are there any safety concerns associated with this exercise? If so, list what they are and what precautions should be taken.
Exercise 1: Examining Skeletal Muscle Cells Observations Sketch the observed chicken skeletal muscle tissue and the muscle tissue from the prepared slide and label the sarcolemma and nuclei.
Questions
A. What muscular structures cause the striped or banded image seen in the chicken’s muscle tissue? The myofibrils are a series of alternating light and dark bands which give the striped appearance in the muscle cells.
B. How are muscle cells different from a “typical” cell in the body?
Muscle cells are different from other cells, because they contain more protein than other cells, specifically actin and myosin proteins.
C. What is the sarcolemma? It is the plasma membrane in muscles.
Exercise 2: Organization of Skeletal Muscle Cells into
Muscles
Observations
Sketch the skeletal muscle cross section. Identify the muscle fibers, endomysium and perimysium. Describe what you observed on the slide.
Questions
A. Why do muscle fibers need to be wrapped and bundled into groups?
So that nerves can send a signal to the bundle instead of each individual fiber. Extensions and Flexions are also much more capable because of bundles.
B. Which tissue comprises the muscle wrappings? Why?
Laszlo Vass, Ed.D.
Version 42-0016-00-01
Lab Report Assistant
This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions, diagrams if needed, and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing this information in an editable file which can be sent to an instructor.
Purpose:
● What is the purpose of this exercise?
● Are there any safety concerns associated with this exercise? If so, list what they are and what precautions should be taken.
Exercise 1: Examining Skeletal Muscle Cells Observations Sketch the observed chicken skeletal muscle tissue and the muscle tissue from the prepared slide and label the sarcolemma and nuclei.
Questions
A. What muscular structures cause the striped or banded image seen in the chicken’s muscle tissue? The myofibrils are a series of alternating light and dark bands which give the striped appearance in the muscle cells.
B. How are muscle cells different from a “typical” cell in the body?
Muscle cells are different from other cells, because they contain more protein than other cells, specifically actin and myosin proteins.
C. What is the sarcolemma? It is the plasma membrane in muscles.
Exercise 2: Organization of Skeletal Muscle Cells into
Muscles
Observations
Sketch the skeletal muscle cross section. Identify the muscle fibers, endomysium and perimysium. Describe what you observed on the slide.
Questions
A. Why do muscle fibers need to be wrapped and bundled into groups?
So that nerves can send a signal to the bundle instead of each individual fiber. Extensions and Flexions are also much more capable because of bundles.
B. Which tissue comprises the muscle wrappings? Why?