The functional unit of contractile system in striated muscle is (a) sarcomere (b) Z-band (c) cross bridges (d) myofibril.

The functional unit of contractile system in striated
muscle is
(a) sarcomere (b) Z-band
(c) cross bridges (d) myofibril.
by

1 Answer

Answer :

(a) sarcomere
by

Related questions

The segment of a myofibril that is called a sarcomere runs from (a) one Z-line to the next Z-line (b) one A-band to the next A-band (c) one H-zone to the next H-zone (d) one end of a skeletal muscle to the opposite end

Description : The segment of a myofibril that is called a sarcomere runs from (a) one Z-line to the next Z-line (b) one A-band to the next A-band (c) one H-zone to the next H-zone (d) one end of a skeletal muscle to the opposite end

Last Answer : Ans:(a)

The contractile unit of muscle is a part of myofibril be- tween

Description : The contractile unit of muscle is a part of myofibril be- tween

Last Answer : The contractile unit of muscle is a part of myofibril be- tween A. Z line and I band B. Z line and Z line C. Z line and A band D. A band and I band

Myosin bridges can be prevented from combining actin by two regulator proteins in resting muscle by (a) troponin (b) myofibril (c) troponin and tropomyosin (d) natural inhibiting proteins

Description : Myosin bridges can be prevented from combining actin by two regulator proteins in resting muscle by (a) troponin (b) myofibril (c) troponin and tropomyosin (d) natural inhibiting proteins

Last Answer : Ans:(c)

The functional unit of the contractile system in the striped muscle is_____

Description : The functional unit of the contractile system in the striped muscle is_____

Last Answer : The functional unit of the contractile system in the striped muscle is_____

Name the two important proteins due to which striated appearance is seen in myofibril

Description : Name the two important proteins due to which striated appearance is seen in myofibril

Last Answer : Name the two important proteins due to which striated appearance is seen in myofibril

During muscle contraction in humans, the (a) sarcomere does not shorten (b) A band remains same (c) A, H and I bands shorten (d) actin filaments shorten.

Description : During muscle contraction in humans, the (a) sarcomere does not shorten (b) A band remains same (c) A, H and I bands shorten (d) actin filaments shorten.

Last Answer : (b) A band remains same

What is sarcomere? (a) Part between two H-line (b) Part between two A-line (c) Part between two I-band (d) Part between two Z-line

Description : What is sarcomere? (a) Part between two H-line (b) Part between two A-line (c) Part between two I-band (d) Part between two Z-line

Last Answer : d) Part between two Z-line

During contraction and relaxation of striated muscle fibre the length of A band usually :-

Description : During contraction and relaxation of striated muscle fibre the length of A band usually :-

Last Answer : During contraction and relaxation of striated muscle fibre the length of A band usually :- A. ... . Increases C. Decreases D. Decreases too much

Which of the following statements about the striated muscles is ture ? In the centre of each I-Band is an elastic fiber(Z-line ) which bisects it M-li

Description : Which of the following statements about the striated muscles is ture ? In the centre of each I-Band is an elastic fiber(Z-line ) which bisects it M-li

Last Answer : Which of the following statements about the striated muscles is ture ? In the centre of each I-Band is an elastic ... C. `i and iii` D. `i and ii`

Stimulation of a muscle fibre by a motor neuron occurs at (a) the neuro-muscular junction (b) the transverse tubules (c) the myofibril (d) the sacroplasmic reticulum.

Description : Stimulation of a muscle fibre by a motor neuron occurs at (a) the neuro-muscular junction (b) the transverse tubules (c) the myofibril (d) the sacroplasmic reticulum.

Last Answer : (a) the neuro-muscular junction

Calcium is important in skeletal muscle contraction because it (a) binds to troponin to remove the masking of active sites on actin for myosin (b) activates the myosin ATPase by binding to it (c) detaches the myosin head from the actin filament (d) prevents the formation of bonds between the myosin cross bridges and the actin filament.

Description : Calcium is important in skeletal muscle contraction because it (a) binds to troponin to remove the masking of active sites on actin for myosin (b) activates the myosin ATPase by binding to it ... filament (d) prevents the formation of bonds between the myosin cross bridges and the actin filament.

Last Answer : (a) binds to troponin to remove the masking of active sites on actin for myosin

Calcium is important in skeletal muscle contraction because it :- (1) binds to troponin to remove the masking of active sites on actin for myosin. (2) activates the myosin ATPase by binding to it. (3) detaches the myosin head from the actin filament. (4) prevents the formation of bonds between the myosin cross bridges and the actin filament.

Description : Calcium is important in skeletal muscle contraction because it :- (1) binds to troponin to remove the masking of active sites on actin for myosin. (2) activates the myosin ATPase by binding to ... filament. (4) prevents the formation of bonds between the myosin cross bridges and the actin filament.

Last Answer : (1) binds to troponin to remove the masking of active sites on actin for myosin.

The distance or length of the myofibril between two adjacent z-bands is called

Description : The distance or length of the myofibril between two adjacent z-bands is called

Last Answer : The distance or length of the myofibril between two adjacent z-bands is called

List any two differences between striated and cardiac muscle with respect to their structure and location. -Biology 9th

Description : List any two differences between striated and cardiac muscle with respect to their structure and location. -Biology 9th

Last Answer : Difference between striated, unstriated and cardiac muscles Striated muscles Unstriated muscles Cardiac musclesStructure Also known as skeletal muscles, they are striated, tubular, multinucleated, unbranched and tubular ... are found in walls of internal organs.They are found in walls of heart.

Bundles of striated muscle fibres called fasciculi are surrounded by a sheath called :-

Description : Bundles of striated muscle fibres called fasciculi are surrounded by a sheath called :-

Last Answer : Bundles of striated muscle fibres called fasciculi are surrounded by a sheath called :- A. Epimysium B. Perimysium C. Exomysium D. Endomysium

The hydrolysis of Glucose-6-phosphate is catalysed by a specific phosphatase which is found only in (A) Liver, intestines and kidneys (B) Brain, spleen and adrenals (C) Striated muscle (D) Plasma

Description : The hydrolysis of Glucose-6-phosphate is catalysed by a specific phosphatase which is found only in (A) Liver, intestines and kidneys (B) Brain, spleen and adrenals (C) Striated muscle (D) Plasma

Last Answer : A

The following are true about the smooth muscle cells: a. presence of a striated appearance b. do not contain actin and myosin c. spontaneous muscle contraction d. mitochondria are absent

Description : The following are true about the smooth muscle cells: a. presence of a striated appearance b. do not contain actin and myosin c. spontaneous muscle contraction d. mitochondria are absent

Last Answer : spontaneous muscle contraction

The following are true about the smooth muscle cells: a. presence of a striated appearance b. do not contain actin and myosin c. spontaneous muscle contraction d. mitochondria are absent

Description : The following are true about the smooth muscle cells: a. presence of a striated appearance b. do not contain actin and myosin c. spontaneous muscle contraction d. mitochondria are absent

Last Answer : spontaneous muscle contraction

The type of muscle present in our (a) heart is involuntary and unstriated smooth muscle (b) intestine is striated and involuntary (c) thigh is striated and voluntary (d) upper arm is smooth muscle and fusiform in shape.

Description : The type of muscle present in our (a) heart is involuntary and unstriated smooth muscle (b) intestine is striated and involuntary (c) thigh is striated and voluntary (d) upper arm is smooth muscle and fusiform in shape.

Last Answer : (c) thigh is striated and voluntary

Characteristics of smooth muscle fibres are (a) spindle-shaped, unbranched, nonstriated, uninucleate and involuntary (b) spindle-shaped, unbranched, unstriped, multinucleate and involuntary (c) cylindrical, unbranched, unstriped, multinucleate and involuntary (d) cylindrical, unbranched, striated, multinucleate and voluntary.

Description : Characteristics of smooth muscle fibres are (a) spindle-shaped, unbranched, nonstriated, uninucleate and involuntary (b) spindle-shaped, unbranched, unstriped, multinucleate and involuntary (c ... , multinucleate and involuntary (d) cylindrical, unbranched, striated, multinucleate and voluntary.

Last Answer : (a) spindle-shaped, unbranched, nonstriated, uninucleate and involuntary

Which one of the following contains the largest quantity of extracellular material? (a) Striated muscle (b) Areolar tissue (c) Stratified epithelium (d) Myelinated nerve fibres

Description : Which one of the following contains the largest quantity of extracellular material? (a) Striated muscle (b) Areolar tissue (c) Stratified epithelium (d) Myelinated nerve fibres

Last Answer : (b) Areolar tissue

(CBSE 2011): Aditi observed following observations while looking into a permanent slide. (i) Cells are long and cylindrical (ii) Light and dark bands are present. It could be a slide of : (a) striated muscle fibre (b) smooth muscle fibre (c) neuron (d) parenchyma cells

Description : (CBSE 2011): Aditi observed following observations while looking into a permanent slide. (i) Cells are long and cylindrical (ii) Light and dark bands are present. It could be a slide of : (a) striated muscle fibre (b) smooth muscle fibre (c) neuron (d) parenchyma cells

Last Answer : (a) striated muscle fibre

Which of the following is an example of striated tissue? a) muscle b) nervous c) epithelial (pron: ep-a-THEE-lee-al) d) connective

Description : Which of the following is an example of striated tissue? a) muscle b) nervous c) epithelial (pron: ep-a-THEE-lee-al) d) connective

Last Answer : ANSWER: A -- MUSCLE

The muscle which is under involuntary control is: a) striated b) smooth c) skeletal

Description : The muscle which is under involuntary control is: a) striated b) smooth c) skeletal

Last Answer : ANSWER: B -- SMOOTH

Which of the following statement(s) is/are correct concerning the cardiovascular response to shock? a. Changes in cardiac contractile function shift the Frank Starling curve up and down b. Venoconstriction from skeletal muscle is a significant contributor to the restoration of blood volume with shock c. Arterial vasoconstriction affects all vascular beds equally d. The total circulating blood volume is equally split between the arterial and venous system

Description : Which of the following statement(s) is/are correct concerning the cardiovascular response to shock? a. Changes in cardiac contractile function shift the Frank Starling curve up and down b. ... d. The total circulating blood volume is equally split between the arterial and venous system

Last Answer : Answer: a Central in the general cardiovascular response to shock is the action of the heart itself. The principle determinants of cardiac function in the normal heart are the volume of blood ... Blood flow to the skin is sacrificed early, followed by that to the kidneys and splanchnic viscera

The contractile proteins in a muscle are (1) Actin and Myosin (2) Actin and Tropomyosin (3) Myosin and Troponin (4)Troponin and Tropomyosin

Description : The contractile proteins in a muscle are (1) Actin and Myosin (2) Actin and Tropomyosin (3) Myosin and Troponin (4)Troponin and Tropomyosin

Last Answer : (1) Actin and Myosin Explanation: Muscle fibers or myofibrils are formed of three types of proteins which are (1) contractile, (2) regulatory, and (3) structural. Contractile proteins are the force ... are Actin which is part of thin filament and Myosin, which is part of the thick filament.

Which of the following is the contractile protein of a muscle? (a) Tropomyosin (b) Tubulin (c) Myosin (d) All of these

Description : Which of the following is the contractile protein of a muscle? (a) Tropomyosin (b) Tubulin (c) Myosin (d) All of these

Last Answer : (c) Myosin

The contractile protein of skeletal muscle involving ATPase activity is (a) troponin (b) tropomyosin (c) myosin (d) α-actinin.

Description : The contractile protein of skeletal muscle involving ATPase activity is (a) troponin (b) tropomyosin (c) myosin (d) α-actinin.

Last Answer : (c) myosin

The contractile proteins in a muscle are?

Description : The contractile proteins in a muscle are?

Last Answer : Actin and Myosin

Which is the contractile protein muscle?

Description : Which is the contractile protein muscle?

Last Answer : Myosin

Adrenergic β2 agonists produce muscle tremor by: A. Facilitating neuromuscular transmission B. Incomplete fusion of contractile response of individual fibres C. Enhanced firing of muscle spindles D. Both (b) and (c) are correct

Description : Adrenergic β2 agonists produce muscle tremor by: A. Facilitating neuromuscular transmission B. Incomplete fusion of contractile response of individual fibres C. Enhanced firing of muscle spindles D. Both (b) and (c) are correct

Last Answer : D. Both (b) and (c) are correct

Adrenergic β2 agonists produce muscle tremor by: A. Facilitating neuromuscular transmission B. Incomplete fusion of contractile response of individual fibres C. Enhanced firing of muscle spindles D. Both (b) and (c) are correct

Description : Adrenergic β2 agonists produce muscle tremor by: A. Facilitating neuromuscular transmission B. Incomplete fusion of contractile response of individual fibres C. Enhanced firing of muscle spindles D. Both (b) and (c) are correct

Last Answer : D. Both (b) and (c) are correct

1. What is Broad money in India? 2. Who has scored the slowest century in the test cricket? 3. Which is the contractile protein muscle? 4. Which set of types actions occur in arid topography? 5. Which was the The most important industry in Sangam age?

Description : 1. What is Broad money in India? 2. Who has scored the slowest century in the test cricket? 3. Which is the contractile protein muscle? 4. Which set of types actions occur in arid ... . Which generally produces the largest quantity of oranges? 20. Which was the first association to be formed?

Last Answer : Answer : 1. M3 2. Mudassar Nazar 3. Myosin 4. Attrition, Corrosion, Abrasion 5. Production of cloth 6. Prime Minister 7. Graphite 8. Muttiah Muralitharan 9. Twice a year 10. Ibrahim Lodi 11. ... 16. Above 20,000 kHz17. Jyoti Basu 18. Sir Thomas Elmhirst 19. Brazil 20. Bangabhasa Pradesika Sabha 

The contractile proteins in a muscle are (1) Actin and Myosin (2) Actin and Tropomyosin (3) Myosin and Troponin (4) Troponin and Tropomyosin

Description : The contractile proteins in a muscle are (1) Actin and Myosin (2) Actin and Tropomyosin (3) Myosin and Troponin (4) Troponin and Tropomyosin

Last Answer : Actin and Myosin 

What are the components of a sarcomere? -Biology

Description : What are the components of a sarcomere? -Biology

Last Answer : answer:

Each myofibril has a diameter of

Description : Each myofibril has a diameter of

Last Answer : Each myofibril has a diameter of A. `1-2 mm` B. `0.1-0.2 mm` C. `0.001 - 0.002 mm` D. None of the above

Which statement is correct for muscle contraction? (a) Length of H-zone decreases. (b) Length of A-band remains constant. (c) Length of I-band increases. (d) Length of two Z-line increases.

Description : Which statement is correct for muscle contraction? (a) Length of H-zone decreases. (b) Length of A-band remains constant. (c) Length of I-band increases. (d) Length of two Z-line increases.

Last Answer : (b) Length of A-band remains constant.

The ion that must be present in adequate amount for the binding of cross bridges with actin is

Description : The ion that must be present in adequate amount for the binding of cross bridges with actin is

Last Answer : The ion that must be present in adequate amount for the binding of cross bridges with actin is A. `Ca^(2+)` B. `Na^(+)` C. `K^(+)` D. `Mg^(2+)`

Briefly describe striated and smooth muscles with their functions. -Biology 9th

Description : Briefly describe striated and smooth muscles with their functions. -Biology 9th

Last Answer : Striated muscles provide the force for locomotion and all other voluntary movements of the body. The smooth muscles are also known as unstriated or involuntary muscles. Smooth muscles occur as bundles ... fusiform or spindle-shaped cells or fibres. They are held together by loose connective tissue.

Briefly describe striated and smooth muscles with their functions. -Biology 9th

Description : Briefly describe striated and smooth muscles with their functions. -Biology 9th

Last Answer : answer:

Are smooth muscles striated yes or No?

Description : Are smooth muscles striated yes or No?

Last Answer : What is the answer ?

Which one of the following pairs of chemical substances, is correctly categorised? (a) Calcitonin and thymosin - Thyroid hormones (b) Pepsin and prolactin - Two digestive enzymes secreted in stomach (c) Troponin and myosin - Complex proteins in striated muscles (d) Secretin and rhodopsin - Polypeptide hormones

Description : Which one of the following pairs of chemical substances, is correctly categorised? (a) Calcitonin and thymosin - Thyroid hormones (b) Pepsin and prolactin - Two digestive enzymes secreted in ... and myosin - Complex proteins in striated muscles (d) Secretin and rhodopsin - Polypeptide hormones

Last Answer : (c) Troponin and myosin - Complex proteins in striated muscles

Identify the tissue shown in the diagram and match with its characteristics and its location. (a) Smooth muscles, show branching, found in the wall of the heart(b) Cardiac muscles, unbranched muscles, found in the walls of the heart (c) Striated muscles, tapering at both-ends, attached with the bones of the ribs (d) Skeletal muscles show striations and are closely attached with the bones of the limbs

Description : Identify the tissue shown in the diagram and match with its characteristics and its location. (a) Smooth muscles, show branching, found in the wall of the heart (b) Cardiac muscles, unbranched ... the ribs (d) Skeletal muscles show striations and are closely attached with the bones of the limbs

Last Answer : (d) Skeletal muscles show striations and are closely attached with the bones of the limbs

Smooth muscles are (a) involuntary, fusiform, non-striated (b) voluntary, multinucleate, cylindrical(c) involuntary, cylindrical, striated (d) voluntary, spindle-shaped, uninucleate.

Description : Smooth muscles are (a) involuntary, fusiform, non-striated (b) voluntary, multinucleate, cylindrical (c) involuntary, cylindrical, striated (d) voluntary, spindle-shaped, uninucleate.

Last Answer : (a) involuntary, fusiform, non-striated

.Which of the following states BEST the morphology of periodontal ligament fibres: A. Elastic B. Striated C. Non striated D. Levity E. Wavy

Description : .Which of the following states BEST the morphology of periodontal ligament fibres: A. Elastic B. Striated C. Non striated D. Levity E. Wavy

Last Answer : E. Wavy

Myosin is one of two proteins that make up the myofibrils of striated muscles. Name the other protein.

Description : Myosin is one of two proteins that make up the myofibrils of striated muscles. Name the other protein.

Last Answer : ANSWER: Actin

Answer: b, c The body contains fuel reserves which it can mobilize and utilize during times of starvation or stress. By far the greatest energy component is fat, which is calorically dense since it provides about 9 calories/gram. Body protein comprises the next largest mass of utilizable energy, but amino acids yield only about 4 kcal/gram. Unlike fat reserves, body protein is not a storage form of energy but rather serves as a structural functional component of the body; loss of body protein, if severe, is associated with functional consequences. Glycogen stored in muscle and liver and free glucose have a trivial caloric value of less than 1000 kcal for a 70 kg male

Description : Answer: b, c The body contains fuel reserves which it can mobilize and utilize during times of starvation or stress. By far the greatest energy component is fat, which is calorically dense since it ... liver and free glucose have a trivial caloric value of less than 1000 kcal for a 70 kg male

Last Answer : Which of the following statement(s) is/are true concerning the indications and administration of nutritional support to cancer patients? a. Preoperative nutritional support should be provided to all ... total parenteral nutrition solutions maintain integrity of the small bowel e. None of the above

Through which of the following activities does the patient learn to consciously contract excretory sphincters and control voiding cues? a) Biofeedback Cognitively intact patients who have stress or urge incontinence may gain bladder control through biofeedback. b) Kegel exercises Kegel exercises are pelvic floor exercises that strengthen the pubococcygeus muscle. c) Habit training Habit training is used to try to keep the patient dry by strictly adhering to a toileting schedule and may be successful with stress, urge, or functional incontinence. d) Bladder training Habit training is a type of bladder training.

Description : Through which of the following activities does the patient learn to consciously contract excretory sphincters and control voiding cues? a) Biofeedback Cognitively intact patients who have stress or urge ... functional incontinence. d) Bladder training Habit training is a type of bladder training.

Last Answer : a) Biofeedback Cognitively intact patients who have stress or urge incontinence may gain bladder control through biofeedback.

Which is responsible for initiating and maintining the rhythmic contractile activity of the heart ?

Description : Which is responsible for initiating and maintining the rhythmic contractile activity of the heart ?

Last Answer : Which is responsible for initiating and maintining the rhythmic contractile activity of the heart ? A. Sino- ... ) C. Purkinje fibres D. Bundle of his