Which muscle tissue type has short branching cells quizlet?
Cardiac muscle tissue. Branched striated fibers under involuntary control. -Cells are short, branched, and striated, usually with a single nucleus; cells are interconnected by intercalated discs.
Which muscle has branching chains of cells?
Cardiac muscle consists of branching chains of cells that are striated and contains a single nucleus.
Does smooth muscle have short branching cells?
Smooth muscle has no striations, is not under voluntary control, has only one nucleus per cell, is tapered at both ends, and is called involuntary muscle. … It has one nucleus per cell, is branched, and is distinguished by the presence of intercalated disks.
Does skeletal muscle have branching fibers?
Four characteristics define skeletal muscle tissue cells: they are voluntary, striated, not branched, and multinucleated. … These stripes are caused by the regular arrangement of actin and myosin proteins within the cells into structures known as myofibrils.
Is smooth muscle tissue branched?
The smooth muscle fibers group in branching bundles. As opposed to skeletal muscle fibers these bundles do not run strictly parallel and ordered but consist in a complex system. Thus the cells can contract much stronger than striated musculature.
Are muscle cells branched?
There are three main types of muscle tissue: striated muscle, cardiac muscle, and smooth muscle. Muscle cells are normally unbranched cells.
Is cardiac muscle branching?
Cardiac muscle has branching fibers, one nucleus per cell, striations, and intercalated disks. Its contraction is not under voluntary control.
What muscle tissue has a banded appearance?
Skeletal muscles are long and cylindrical in appearance; when viewed under a microscope, skeletal muscle tissue has a striped or striated appearance. The striations are caused by the regular arrangement of contractile proteins (actin and myosin).
Which muscle tissue contains myofilaments?
ch 10 skeletal muscle tissue. -All muscle tissues contains the myofilaments actin and myosin, which generate contractile forces; the plasma membrane is called a sarcolemma; and the cytoplasm is called sacroplasm .
Why cardiac muscle cells are branched?
Cardiac muscle cells are branched, allowing for faster signal propagation and contraction in three dimensions. Cardiac muscles cells are not fused together, but are connected by gap junctions at intercalated discs.
Why are cardiac muscles shorter?
Similar to skeletal muscle, cardiac muscle is striated and organised into sarcomeres, possessing the same banding organisation as skeletal muscle (Figure 9.7. 1). However, cardiac muscle fibres are shorter than skeletal muscle fibres and usually contain only one nucleus, which is in the central region of the cell.
Is cardiac muscle spindle shaped?
The cells of cardiac muscle, known as cardiomyocytes, also appear striated under the microscope. Unlike skeletal muscle fibers, cardiomyocytes are single cells typically with a single centrally located nucleus. … Each cell is spindle shaped with a single nucleus and no visible striations (Figure 1).
Which skeletal muscle fiber type has few capillaries?
Other fast-twitch fibers (type IIb) rely on the energy stored in glycogen and phosphocreatine because they contain fewer mitochondria, have low myoglobin (and thus are white muscle) and oxidative enzyme content, and are invested by a less dense capillary network [20, 58].
Why is cardiac muscle striated and branched?
Like skeletal muscle, cardiac muscle cells are striated due to a similar arrangement of contractile proteins. Unique to the cardiac muscle are a branching morphology and the presence of intercalated discs found between muscle fibers. … They are often seen as zigzagging bands cutting across the muscle fibers.
Which of the following microscopic structures is only found in the cardiac muscle tissue?
One feature unique to cardiac muscle is the presence of intercalated discs. These were originally believed to be another type of striation or stripe. From studies of these bands with the electron microscope it can be seen that these discs represent the end-to-end junction of adjacent cardiac muscle cells.
What type of muscle fiber has more capillaries?
Slow-twitch muscle fibers have high concentrations of mitochondria and myoglobin. Although they are smaller than the fast-twitch fibers, they are surrounded by more capillaries (1,2).
Which type of muscle fibres contain few mitochondria?
Fast twitch fibers, or type II fibers, have fewer mitochondrion and myoglobin proteins than slow twitch fibers (2). Despite the decreased amount of mitochondria, type II fibers are still able to synthesize large amounts of energy through anaerobic processes.
Why do fast glycolytic fibers have few mitochondria and capillaries?
Fast glycolytic muscles have a low supply of oxygen and therefore very little mitochondria. They contain very few myoglobin molecules and therefore appear white. The muscle fibers have a large diameter and therefore produce a large contractile force. They break down ATP quickly and therefore contract quickly.