Muscle Directed Study 10/1/12
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
|---|---|---|---|---|---|
| What are the features of smooth muscle? | elongated nuclei, spindle shape of cells. Found in the walls of organs and in blood vessels. Myofilaments arranged randomly enable cells to stretch
🗑
|
||||
| What are the features of skeletal muscle? | nuclei on the outer side of cells. Overlapping filaments create striation pattern.
🗑
|
||||
| What are muscle spindles? | Fibers found in the belly of the muscle. They detect changes in length of the muscle.
🗑
|
||||
| What is the A-band composed of in a skeletal muscle? | entire length of a single thick filament.
🗑
|
||||
| What is the I-band of in a skeletal muscle? | zone of thin filaments that is not superimposed by thick filaments
🗑
|
||||
| What are the Z-discs composed of in a skeletal muscle? | Series of dark lines between the I bands where two cells meet
🗑
|
||||
| What are the features of cardiac muscle? | Found only in the heart, Y-shaped cells that are shorter than skeletal muscle cells, intercalated discs located between cells
🗑
|
||||
| What are the features of cardiac myocyte nuclei? | Nuclei are larger than in skeletal muscle and centrally located
🗑
|
||||
| What are intercalated discs? | Where two cardiac myocytes meet. Help muscle to contract as a unit
🗑
|
||||
| What is the epicardium? | Outer CT layer of heart tissue.
🗑
|
||||
| What is endocardium? | Lines chambers of the heart
🗑
|
||||
| What are purkinje fibers? | Part of the heart's conductive system
🗑
|
||||
| What do epimysium line? | Entire muscle
🗑
|
||||
| What do perimysium line? | Groups of muscle fibers into fascicles
🗑
|
||||
| What do endomysium line? | Individual muscle fiber
🗑
|
||||
| What are the three types of cell junctions in intercalated discs? | fascia adherens, macula adherens, gap junctions
🗑
|
||||
| What is the function of the fascia adherens? | Anchoring site for actin, connect to the closest sacromere
🗑
|
||||
| What is the function of the macula adherens? | Stop separation during contraction by binding intermediate filaments. Also called desmosomes
🗑
|
||||
| What is the function of the gap junctions? | Allow action potentials to spread between cardiac cells
🗑
|
||||
| What is the structure of purkinje fibers in the heart? | Originates in the SA node. Fibers are split into left and right trees as well as atrial and ventricular contributions. Appear "fuzzy"
🗑
|
||||
| What is the function of purkinje fibers in the heart? | Carry the contraction impulse from the left and right bundle branch to the myocardium of the ventricles
🗑
|
||||
| What is the location of purkinje fibers in the heart? | just below the endocardium in the inner ventricular walls of the heart
🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Created by:
583931909
Popular Medical sets