a&p review 14
About this set
Created by:
lisa_p on November 5, 2010
Subjects:
organization of skeletal muscle
Description:
microscopic anatomy and organization of skeletal muscle.
Log in to favorite or report as inappropriate.
Order by
18 terms
Terms | Definitions |
|---|---|
 perimysium | connective tissue ensheathing a bundle of muscle cells. |
| fascicle | bundle of muscle cells. |
| sarcomere | contractile unit of muscle. |
| myofibril | muscle cell |
| endomysium | thin reticular connective tissue surrounding each muscle cell. |
| sarcoplasm | plasma membrane of muscle fiber. |
| fiber | a long filamentous organelle with a banded appearance found within muscle cells. |
| myofilament | actin or myosin containing structure |
| tendon | cord of collagen fibers that attaches muscle to bone. |
| list three reasons why the connective tissue wrappings of the skeletal muscle are important. | supporting and binding the muscle fibers, providing strength to the muscle as a whole and to provide a route for the entry and exit of nerves and blood vessels that serve the muscle fibers. |
| why are there more indirect- that is, tendinous- muscle attachmens to bone than there are indirect attachments? | they can span rough bony prominences that would destroy the more delicate muscle tissues and because of their relatively small size, more tendons than muscles can pass over joints. |
| how does an aponeurosis differ from a tendon structurally? | tendons are strong and cord-like and attach muscle to bone; aponeurosis are sheet-like and attach muscle to muscle. |
| the junction between a motor neuron's axon and the muscle cell membrane is called? | neuromuscular junction |
| a motor neuron and all of the the skeletal muscle cells it stimulates is called a | motor unit |
| the actual gap between the axon terminal and the muscle cell is called a | synaptic cleft |
| within the axon terminal are many small vesicles containing a neurotransmitter substance called | Ach- acetylcholine |
| when the _____ reaches the ends of the axon, the neurotransmitter is released and diffuses to the muscle cell membrane to combine with receptors there. | nerve impulse |
| the greater influx of sodium ions results in ______ of the membrane. Then contraction of the muscle cell occurs. | permeability |
First Time Here?
Welcome to Quizlet, a fun, free place to study. Try these flashcards, find others to study, or make your own.