Which of the Following Is True About Smooth Muscle

Smooth muscle cant maintain an even amount of tension. Which of the following is true about smooth muscle.

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Its under voluntary control.

. Smooth muscles do not possess alternate dark and light bands. Smooth muscle cannot stretch as much as skeletal muscle. Cell junctions are bundled together in a connective tissue sheath.

It is present throughout arteries and veins where it plays a vital role in. Smooth muscle myosin ATPase activity is much slower than skeletal muscle. 19 Which of the following is true about smooth muscle contraction.

Smooth muscle can shorten more relative to its length compared with striated skeletal muscle. In skeletal muscle calcium ions bind to a regulatory protein on thin filaments. Striated muscle contracts and relaxes in short intense bursts whereas smooth muscle sustains longer or even near-permanent contractions.

Which of the following is true about smooth muscle. The Calcium ions Ca2 have a key role in skeletal muscle contraction. It exists throughout the urinary system where it functions to help rid the body of toxins and works in electrolyte balance.

C Certain smooth muscle cells can actually divide to increase their numbers. Smooth muscle cells do not have T tubules. B Smooth muscle has well-developed T tubules at the site of invagination.

All of the following are true concerning smooth muscles EXCEPT A. B Smooth muscle is larger and more powerful than striated muscle. Smooth muscle is under autonomic nervous system control.

Its under voluntary control. D Smooth muscle cannot stretch as much as skeletal muscle. - is true about smooth muscle.

Smooth muscle fibers are spindle-shaped wide in the middle and tapered at both ends somewhat like a football and have a single nucleus. Smooth muscle in contrast to skeletal muscle cannot synthesize or secrete any connective tissue elements. The protein tropomyosin covers the myosin binding sites of the actin molecules in the muscle cell.

Smooth muscle can shorten more relative to its length compared with striated skeletal muscle. C Smooth muscle in contrast to skeletal muscle cannot synthesize or secrete any connective tissue elements. Which of the following statements regarding smooth muscle is correct AnswerB.

Which of the following is true about smooth muscle. In smooth muscle calcium ions bind to a regulatory. B Smooth muscle has sarcomeres C In smooth muscle the calcium-calmodulin complex activates an enzyme that phosphorilates the head of the myosin.

Smooth muscle contractions are longer and slower than skeletal muscle contractions. 20 In a relaxed smooth muscle fiber the. Most organs contain two layers or sheets of tightly packed of smooth muscle fibers oriented at right angles to each other Smooth muscle has.

C The fibers of smooth muscle are arranged quadrangularly. Visceral smooth muscle 5. Parasympathetic nervous system may influence lymph node activity 2.

Both cardiac and smooth muscle are involuntary while skeletal muscle is voluntary. It is in the stomach and intestines where it helps with digestion and nutrient collection. Skeletal muscle is a voluntary muscle whereas cardiac muscle is an involuntary muscle.

D Smooth muscle has transverse tubules. Hence A-Band remains constant is true of muscle contraction. A Certain smooth muscle cells can actually divide to increase their numbers.

Calcium binds to the regulatory protein calmodulin in smooth muscle while calcium binds to troponin in skeletal muscle. Which of the following is true. Of the following EXCEPT.

Smooth muscle cells have a single nucleus and are spindle-shaped. Smooth muscle cells can undergo hyperplasia mitotically dividing to produce new cells. B Smooth muscle has well-developed T tubules at the site of invagination.

1 In smooth muscle contraction the majority of calcium Ca 2 needed for contraction enters the cell from the extracellular fluid. As the bronchial tree terminates in bronchioles the principal material comprising their walls is smooth muscle. It has fibre taper at both the ends and it does not show striations.

They are found in blood vessels stomach and intestine. They may be connected to each other by gap junctions. A Smooth muscle contracts in a twisting way.

3 Transverse t tubules are present in smooth muscle. Arteriolar smooth muscle 3. Contraction is not dependent on troponin which is absent from the thin filament of smooth muscle.

Smooth muscles have more sarcoplasmic reticulum than skeletal muscles. A Smooth muscle has well-developed T tubules. This suggests that the.

Smooth muscle is significantly different from striated muscle in several ways. Smooth muscle is found throughout the body around various organs and tracts. Smooth muscle is present throughout the body where it serves a variety of functions.

Test your basic knowledge of smooth muscle physiology by taking this simple quiz. Smooth muscle is under involuntary control while skeletal muscle is under voluntary control. Which of the following is true of smooth muscle.

Which of the following statements regarding contraction in skeletal and smooth muscle is TRUE. D Smooth muscle cannot stretch as much as skeletal muscle. In skeletal muscle calcium initiates contraction by binding to troponin while in smooth muscle calcium initiates contraction by binding directly to myosin.

A chemical change in the environment around smooth muscle may create a contraction. Contraction may be initiated by stretching neural impulses the intercellular passage of small molecules via gap junctions or the action of hormones such as oxytocin. Smooth muscles are unstriated.

Glands Some of the nerves that innervate lymph nodes have been discovered to be adrenergic ie they release norepinephrine. Smooth muscle cant maintain an even amount of tension. Smooth muscle fibers are long tapering cells with a single centrally located nucleus.

It cant maintain a steady state of contraction. Sequential waves of smooth muscle contraction which propel food through the digestive tract are known as peristalsis. Smooth muscle can shorten more relative to its length compared with striated skeletal muscle.

D Smooth muscle contains high concentration of troponin. Upon muscle contraction the A-bands do not change their length whereas the I-bands and the H-zone shorten. This causes the Z lines to come closer together.

A Smooth muscle in contrast to skeletal muscle cannot synthesize or secrete any connective tissue elements. In skeletal muscle calcium initiates contraction by binding to troponin while in smooth muscle calcium initiates contraction by binding to calmodulin. ASmooth muscle can receive both stimulatory and inhibitory input from the nervous system bSmooth muscle produces force via the sliding filament mechanism cSmooth muscle contraction relies on the phosphorylation of myosin heads by myosin light chain kinase dSmooth muscle contraction requires the binding of Ca2 to calmodulin eSmooth muscle contraction.

Cardiac and skeletal muscle are both striated in appearance while smooth muscle is not. A smooth muscle in contrast to skeletal muscle cannot synthesize or secret any connective tissue elements b certain smooth muscle cells can actually divide to increase their numbers c smooth muscle has well-developed T tubules at the site of invagination d smooth muscle cannot stretch as much as skeletal muscle.

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