Zoo141 (Uno) Study Guide
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
|---|---|---|---|---|---|
| Epimysium | dense layer of collagen fibers surrounding entire skeletal muscle
🗑
|
||||
| Perimysium | fibrous layer that divides the skeletal muscle into fascicles (bundles of skeletal muscle fibers
🗑
|
||||
| Endomysium | delicate connective tissue surrounding individual muscle fibers
🗑
|
||||
| Tendon | bundle of collagenous connective tissue attaching muscle to bone
🗑
|
||||
| Aponeurosis | broad sheet of collagenous connective tissue attaching muscle to bone
🗑
|
||||
| Development of skeletal muscle fibers | myoblasts fuse into large multinucleate cells, which differentiate into skeletal muscle fibers (some myoblasts remain undifferentiated, as myosatellite cells)
🗑
|
||||
| Sarcolemma | plasma membrane
🗑
|
||||
| Sarcoplasm | cytoplasm
🗑
|
||||
| Myofibrils | bundles of protein filaments called myofilaments, which contain repeating functional unit called sarcomeres
a. thin filaments: composed primarily of actin
b. thick filaments: composed primarily of myosin
🗑
|
||||
| Transverse tubules (T tubules) | carry electrical activity from sarcolemma into cell interior
🗑
|
||||
| Sarcoplasmic reticulum (SR) | -carry electrical activity from sarcolemma into cell interior
-stores and releases calcium, to start muscle contraction
a. terminal cisternae = expanded chambers that contact T tubule, forming triad
🗑
|
||||
| A band | contains the entire width of the thick filaments
🗑
|
||||
| H band | contains the part of the thick filaments that does not overlap the thin filaments
🗑
|
||||
| I band | contains the part of the thin filaments that does not overlap the thick filaments
🗑
|
||||
| M line | connect the central portion of each thick filament
🗑
|
||||
| Z line | marks boundary between adjacent sarcomeres; consists of actinin proteins
🗑
|
||||
| G-actin (globular actin) | contains active sites that bind to myosin
🗑
|
||||
| F-actin (filamentous actin) | twisted strand composed of two rows of G-actin molecules
🗑
|
||||
| Nebulin | holds the F-actin strand together
🗑
|
||||
| Tropomyosin | strands that cover the active sites on G-actin
🗑
|
||||
| Troponin | has three subunits, that bind to tropomyosin, G-actin, and calcium
🗑
|
||||
| Myosin | has head that binds to thin filaments, and tail
🗑
|
||||
| Titin | forms core of thick filament
🗑
|
||||
| Structure of Neuromuscular | intercellular connection between muscle fiber and neuron
🗑
|
||||
| Synaptic Terminal of Neuron | contains vesicles filled with Ach
🗑
|
||||
| Motor End Plate of Muscle Fiber | has deep creases called junctional folds
🗑
|
||||
| Synaptic Cleft | space containing AChE (enzyme that breaks down ACh)
🗑
|
||||
| Latent Period | action potential sweeps across sarcolemma, SR releases Ca ions
🗑
|
||||
| Contraction Phase | tension rises to peak, as cross-bridge interactions occur
🗑
|
||||
| Relaxation Phase | tension decreases, as Ca levels fall, tropomyosin covers the active sites on actin, and myosin is blocked from binding to actin
🗑
|
||||
| Motor Unit | all the muscle fibers controlled by a single motor neuron
🗑
|
||||
| Isometric Contraction | muscle contraction without change in length
🗑
|
||||
| Isotonic contraction | muscle length changes during contraction
a. concentric contraction: muscle shortens during contraction
b. eccentric contraction: muscle lengthens during contraction
🗑
|
||||
| Sources of energy stored in a typical muscle fiber | 1. ATP
2. Creatine Phosphate (CP)
3. Glycogen
🗑
|
||||
| ATP production in resting muscle | 1. more than enough oxygen available for mitochondria
2. primary energy sources: glucose and fatty acids from blood enter mitochondria
3. surplus of ATP used to convert creatine to creatine phosphate, and glucose to glycogen
🗑
|
||||
| ATP production in muscle at peak activity levels | 1. not enough oxygen available for mitochondria
2. primary energy sources: glucose from stored glycogen -> glycolysis (lactic acid also produced)
🗑
|
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:
100008367637316
Popular Anatomy sets