What is the plasma membrane of muscle fibers called?
The muscle cell membrane is called the sarcolemma and the cytoplasm, the sarcoplasm. The sarcolemma has the property of excitability and can conduct the electrical impulses that occur during depolarization.
Where a motor neuron axon terminal and a muscle cell meet is called a?
neuromuscular junction, also called myoneural junction, site of chemical communication between a nerve fibre and a muscle cell. The neuromuscular junction is analogous to the synapse between two neurons.
What is the covering of a muscle fiber called?
Each skeletal muscle consists of thousands of muscle fibers wrapped together by connective tissue sheaths. The individual bundles of muscle fibers in a skeletal muscle are known as fasciculi. The outermost connective tissue sheath surrounding the entire muscle is known as epimysium.
What is the fascicle?
Each fascicle (or fasciculus) is a bundle of muscle fibers, also called myocytes, bound together via the endomysium tissue that provides pathways for the passage of blood vessels and nerves.
What is the plasma membrane of skeletal muscle cells called quizlet?
The plasma membrane of skeletal muscle is called sarcolemma, from sarco meaning “flesh” and lemma meaning “shell.” The degree to which a muscle cell can stretch depends on its: distensibility.
Is the sarcolemma the plasma membrane?
The sarcolemma is the plasma membrane of the muscle cell and is surrounded by basement membrane and endomysial connective tissue. The sarcolemma is an excitable membrane and shares many properties with the neuronal cell membrane.
When nerve impulse ends the muscle returns to its original length which is called?
– Skeletal muscles can stretch up to three times their contracted length, this is called extensibility. – Muscles can stretch, and when released, return to their original, shorter length. This property is referred to as elasticity.
Which area contains the motor end plate the terminal end of the motor neuron and the synaptic gap?
The neuromuscular junction (NMJ) is a synaptic connection between the terminal end of a motor nerve and a muscle (skeletal/ smooth/ cardiac). It is the site for the transmission of action potential from nerve to the muscle. It is also a site for many diseases and a site of action for many pharmacological drugs.
What is the other name of sarcolemma?
myolemma
The sarcolemma (sarco (from sarx) from Greek; flesh, and lemma from Greek; sheath) also called the myolemma, is the cell membrane surrounding a skeletal muscle fiber or a cardiomyocyte.
What is sarcolemma and Sarcoplasm?
structure of muscle cells
called the sarcolemma, separates the sarcoplasm (muscle cell cytoplasm) from the extracellular surroundings. Within the sarcoplasm of each individual muscle fibre are approximately 1,000 to 2,000 myofibrils.
What is another word for fascicle?
In this page you can discover 12 synonyms, antonyms, idiomatic expressions, and related words for fascicle, like: group, bundle, cluster, installment, bunch, collection, fasciculus, fiber bundle, fibre-bundle, fascicule and graecorum.
Where is sarcolemma located?
the muscle cell
The sarcolemma is the plasma membrane of the muscle cell and is surrounded by basement membrane and endomysial connective tissue. The sarcolemma is an excitable membrane and shares many properties with the neuronal cell membrane.
What term is used for the plasma membrane of A muscle fiber quizlet?
Terms in this set (19)
A skeletal muscle fiber is surrounded by a plasma membrane called the sarcolemma, which contains sarcoplasm, the cytoplasm of muscle cells.
Is the cell membrane of A muscle fiber quizlet?
The cell membrane of a muscle fiber is called a sarcolemma \text{\color{#4257b2}\textbf{a sarcolemma}} a sarcolemma.
What is called sarcolemma?
What is the definition of sarcolemma?
Which occurs during muscle contraction quizlet?
When muscle contraction occurs. The actin and myosin filaments temporary form cross-bridge attachments and slide over each other, shortening the overall length of the sarcomeres.
What is the sacs suspended within the synaptic end bulb?
Suspended in the cytosol within each synaptic end bulb are hundreds of membrane-enclosed sacs called synaptic vesicles. Inside each synaptic vesicle are thousands of molecules of acetylcholine (as- e¯ -til-KO¯ -le¯ n), abbreviated ACh, the neurotransmitter released at the NMJ.
What is located on the motor end plate?
neuromuscular junction
…of muscle fibre called the end plate. Embedded in the end plate are thousands of receptors, which are long protein molecules that form channels through the membrane. Upon stimulation by a nerve impulse, the terminal releases the chemical neurotransmitter acetylcholine from synaptic vesicles.
Is sarcolemma and sarcomere the same?
2 – Muscle Fiber: A skeletal muscle fiber is surrounded by a plasma membrane called the sarcolemma, which contains sarcoplasm, the cytoplasm of muscle cells. A muscle fiber is composed of many myofibrils, which contain sarcomeres with light and dark regions that give the cell its striated appearance.
What is sarcoplasm and sarcolemma?
Why is it called sarcoplasm?
Sarcoplasm is the cytoplasm of a muscle cell. It is comparable to the cytoplasm of other cells, but it contains unusually large amounts of glycogen (a polymer of glucose), myoglobin, a red-colored protein necessary for binding oxygen molecules that diffuse into muscle fibers, and mitochondria.
What is the definition of Sarcolemma?
What is a fascicle quizlet?
Fascicle. A bundle of muscle fibers.