Welcome to the Smooth Muscles MCQs with Answers. In this post, we have shared Smooth Muscles Online Test for different competitive exams. Find practice Smooth Muscles Practice Questions with answers in Biology Tests exams here. Each question offers a chance to enhance your knowledge regarding Smooth Muscles.
| Smooth muscles comprise involuntary muscle tissue. Therefore, they must be present throughout the body, mainly in the walls of hollow organs and structures. They are not under voluntary control, unlike skeletal muscles; therefore, everything is regulated automatically so that such critical processes are executed without attention or effort. Cells of smooth muscles are spindle-shaped without striations, hence with smooth appearance by microscopic detection. Each single nucleus cell is usually found arranged in sheets or layers. These muscles are innervated by the autonomic nervous system, which include functions such as digestion, blood circulation, and airflow in the respiratory system. Within the intestines, smooth muscles cause peristalsis-the rhythmic sequence of contractions that enable food to move within the digestive tract. It aids in maintaining a stable level of blood pressure and flow as the muscles contract or dilate due to certain stimuli; this is called vasoconstriction and vasodilation. Smooth muscles can maintain contractions for hours. This characteristic will be important in maintaining blood vessel tone and movement of materials through the gastrointestinal tract. Their slow but sustained contraction makes smooth muscles very essential in many involuntary processes that will assist in supporting overall health and homeostasis of the body. |
Smooth Muscles Online Quiz
By presenting 3 options to choose from, Smooth Muscles Quiz which cover a wide range of topics and levels of difficulty, making them adaptable to various learning objectives and preferences. You will have to read all the given answers of Smooth Muscles Questions and Answers and click over the correct answer.
- Test Name: Smooth Muscles MCQ Quiz Practice
- Type: Quiz Test
- Total Questions: 40
- Total Marks: 40
- Time: 40 minutes
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Smooth Muscles Flashcards
Smooth muscles lack ____________, which gives them a smooth appearance under a microscope.
Striations
What is the term for the dense bodies that anchor thin filaments in smooth muscle cells?
Dense plaques
What is the term for the involuntary contraction and relaxation of smooth muscles in the walls of hollow organs?
Peristalsis
Which enzyme is responsible for the phosphorylation of myosin in smooth muscle contraction?
Myosin light-chain kinase
Smooth muscle contraction is regulated by which division of the autonomic nervous system?
Sympathetic
Smooth muscle contraction is controlled by the release of ____________ from the sarcoplasmic reticulum.
Calcium ions
What is the term for the slow, sustained contraction of smooth muscles in response to a stimulus?
Tonic contraction
Smooth muscle contraction is initiated by an increase in ____________ concentration inside the cell.
Calcium
What is the term for the ability of smooth muscle cells to contract without external stimulation?
Myogenic
Smooth muscle cells contract in response to the binding of ____________ to receptors on their surface.
Neurotransmitters
Which structure in smooth muscle cells allows for the rapid spread of electrical signals?
Gap junctions
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