Four characteristics define smooth muscle tissue cells: they are
involuntarily controlled, not striated, not branched, and singly nucleated
. The unconscious regions of the brain control visceral muscle through the autonomic and enteric nervous systems. Thus, visceral muscle is involuntarily controlled.
What are the characteristics of smooth muscle quizlet?
- Single nucleus per cell.
- No branches.
- No cross striations (no sarcomeres)
- Slow, rhythmic, prolonged contractions of visceral organs.
- Involuntary movement.
What are the main characteristics of muscles?
- excitability.
- contractility.
- extensibility – they can be stretched.
- elasticity – they return to normal length after stretching.
What are two characteristics of smooth muscle?
- Smooth muscle cell shape. The smooth muscle cell is fusiform in shape. …
- The filaments. …
- Single nucleus. …
- Elasticity. …
- Contractility. …
- Lack of sarcomeres. …
- Lack of a tropomyosin complex.
What are the characteristics of the smooth muscle?
Smooth muscle, also called involuntary muscle, muscle that shows no cross stripes under microscopic magnification. It consists of
narrow spindle-shaped cells with a single, centrally located nucleus
. Smooth muscle tissue, unlike striated muscle, contracts slowly and automatically.
What is the structure and function of smooth muscle?
Smooth muscle has different functions in the Human body, including:
Sealing orifices
; Transport chyme through wavelike contractions of the intestinal tube; Myofibroblasts produce connective tissue proteins such as collagen and elastin.
Which is not characteristic of smooth muscle?
These muscles do not show
striations
. The muscle fibres are spindle-shaped tapering and uninucleate. These muscles are involuntary.
Which of the following is a function of smooth muscle tissue?
Smooth muscle is found in the walls of hollow organs like your intestines and stomach. They work automatically without you being aware of them. Smooth muscles are involved in many
‘housekeeping’ functions
of the body. The muscular walls of your intestines contract to push food through your body.
Is smooth muscle under involuntary control?
Smooth muscle, which is found in blood vessels, the gastrointestinal (GI) tract, bronchioles, the uterus, and the bladder, is
under involuntary control by reflexes
and the body’s autonomic nervous system.
What are the 4 functions of the muscular system?
- Mobility. The muscular system’s main function is to allow movement. …
- Stability. Muscle tendons stretch over joints and contribute to joint stability. …
- Posture. …
- Circulation. …
- Respiration. …
- Digestion. …
- Urination. …
- Childbirth.
What are the six characteristics of muscles?
- Contractility is the ability of muscle cells to forcefully shorten. …
- Excitability is the ability to respond to a stimulus, which may be delivered from a motor neuron or a hormone.
What are the 5 types of muscle movements?
- Abduction.
- Adduction.
- Flexion.
- Hyperflexion.
- Extension.
- Hyperextension.
- Rotation.
- Internal rotation.
Where is smooth muscle found in the body?
Smooth muscle fibers are located
in walls of hollow visceral organs
, except the heart, appear spindle-shaped, and are also under involuntary control. Skeletal muscle fibers occur in muscles which are attached to the skeleton.
Which muscles are also known as the smooth muscles?
| Question Answer | Which muscles are also known as the smooth muscles? Nonstriated muscles | The part of the muscle that does not move is the: Origin | The broad muscle that covers the top of the head is the: Epicranius | The muscle of the nose is the _____ muscle. Procurious |
|---|
What is the structure of smooth muscle?
Smooth muscle consists of
thick and thin filaments that are not arranged into sarcomeres
giving it a non-striated pattern. On microscopic examination, it will appear homogenous. Smooth muscle cytoplasm contains a large amount of actin and myosin. Actin and myosin act as the main proteins involved in muscle contraction.
What is the structure and function of cardiac muscle?
Cardiac muscle tissue
works to keep your heart pumping through involuntary movements
. This is one feature that differentiates it from skeletal muscle tissue, which you can control. It does this through specialized cells called pacemaker cells. These control the contractions of your heart.
