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

Bundles of striated muscle fibres called fasciculi are surrounded by a sheath called :-
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Bundles of striated muscle fibres called fasciculi are surrounded by a sheath called :- A. Epimysium B. Perimysium C. Exomysium D. Endomysium
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The transverse section of a plant shows following anatomical features : (i) Large number of scattered vascular bundles surrounded by bundle sheath (ii) Large conspicuous parenchymatous ground tissue (iii)vascular bundles conjoint and closed (iv) phloem parenchyma absent Identify the category of plant and its part. (a) Monocotyledonous stem (b) Monocotyledonous root (c) Dicotyledonous stem (d) Dicotyledonous root

Description : The transverse section of a plant shows following anatomical features : (i) Large number of scattered vascular bundles surrounded by bundle sheath (ii) Large conspicuous parenchymatous ground ... (a) Monocotyledonous stem (b) Monocotyledonous root (c) Dicotyledonous stem (d) Dicotyledonous root

Last Answer : (a) Monocotyledonous stem

Vascular bundles in monocotyledons are considered closed because (a) there are no vessels with perforations (b) xylem is surrounded all around by phloem (c) a bundle sheath surrounds each bundle (d) cambium is absent.

Description : Vascular bundles in monocotyledons are considered closed because (a) there are no vessels with perforations (b) xylem is surrounded all around by phloem (c) a bundle sheath surrounds each bundle (d) cambium is absent.

Last Answer : (d) cambium is absent.

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

When in plant leaves, chloroplast containing bundle sheath cells surrounds vascular bundles in several layers that anatomy is known as

Description : When in plant leaves, chloroplast containing bundle sheath cells surrounds vascular bundles in several layers that anatomy is known as

Last Answer : When in plant leaves, chloroplast containing bundle sheath cells surrounds vascular bundles in several layers that anatomy is known as

.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

Some vascular bundles are described as open because these (a) are surrounded by pericycle but no endodermis (b) are capable of producing secondary xylem and phloem(c) possess conjunctive tissue between xylem and phloem (d) are not surrounded by pericycle.

Description : Some vascular bundles are described as open because these (a) are surrounded by pericycle but no endodermis (b) are capable of producing secondary xylem and phloem (c) possess conjunctive tissue between xylem and phloem (d) are not surrounded by pericycle.

Last Answer : (b) are capable of producing secondary xylem and phloem

The pyrenoids are made up of (a) proteinaceous centre and starchy sheath (b) core of nucleic acid surrounded by protein sheath (c) core of protein surrounded by fatty sheath (d) core of starch surrounded by sheath of protein.

Description : The pyrenoids are made up of (a) proteinaceous centre and starchy sheath (b) core of nucleic acid surrounded by protein sheath (c) core of protein surrounded by fatty sheath (d) core of starch surrounded by sheath of protein.

Last Answer : a) proteinaceous centre and starchy sheath

Cells which envelop nerve fibres and form myelin sheath around the axon are

Description : Cells which envelop nerve fibres and form myelin sheath around the axon are

Last Answer : Cells which envelop nerve fibres and form myelin sheath around the axon are

Cells which envelop nerve fibres and form myelin sheath around the axon are

Description : Cells which envelop nerve fibres and form myelin sheath around the axon are

Last Answer : Cells which envelop nerve fibres and form myelin sheath around the axon are

Which one of the following pairs of structures distinguishes a nerve cell from other types of cell? (a) Vacuoles and fibres (b) Flagellum and medullary sheath (c) Nucleus and mitochondria (d) Perikaryon and dendrites

Description : Which one of the following pairs of structures distinguishes a nerve cell from other types of cell? (a) Vacuoles and fibres (b) Flagellum and medullary sheath (c) Nucleus and mitochondria (d) Perikaryon and dendrites

Last Answer : d) Perikaryon and dendrites

.Given below is the diagram of a bacteriophage. In which one of the options all the four parts A, B, C and D are correct? A B C D (a) Tail fibres Head Sheath Collar (b) Sheath Collar Head Tail fibres (c) Head Sheath Collar Tail fibres (d) Collar Tail fibres Head Sheath

Description : .Given below is the diagram of a bacteriophage. In which one of the options all the four parts A, B, C and D are correct? A B C D (a) Tail fibres Head Sheath Collar (b) Sheath Collar Head Tail fibres (c) Head Sheath Collar Tail fibres (d) Collar Tail fibres Head Sheath

Last Answer : (c) Head Sheath Collar Tail fibres

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.

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

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

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

Last Answer : (a) sarcomere

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

(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

Muscle is surrounded by a tough sheet of whitish connective tissue called: a) apodeme b) annelida c) fascia d) none of the above

Description : Muscle is surrounded by a tough sheet of whitish connective tissue called: a) apodeme b) annelida c) fascia d) none of the above

Last Answer : ANSWER: C -- FASCIA

The pacesetter in the heart is called (a) sino-atrial node (SAN) (b) atrio-ventricular node (AVN) (c) Purkinje fibres (d) papillary muscle.

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Last Answer : (b) atrio-ventricular node (AVN)

Muscle fibres having rounded ends are

Description : Muscle fibres having rounded ends are

Last Answer : Muscle fibres having rounded ends are A. Unstriped muscles B. Smoothe muscles C. Striated muscles D. All the above

Why can cardiac muscle fibres contract for longer periods than skeletal fibres? (a) Cardiac muscle is self-excitatory (b) Extracellular calcium partially controls the strength (and length) of contraction (c) Cisternae of T-tubules are more developed in cardiac muscle (d) Cardiac muscle is uninucleate rather than multinucleate

Description : Why can cardiac muscle fibres contract for longer periods than skeletal fibres? (a) Cardiac muscle is self-excitatory (b) Extracellular calcium partially controls the strength (and length) ... tubules are more developed in cardiac muscle (d) Cardiac muscle is uninucleate rather than multinucleate

Last Answer : Ans:(a)

In human body, ligaments are made up of (1) white fibres and some yellow elastic fibres (2) white fibres only (3) yellow fibres only (4) yellow fibres and muscle fibres

Description : In human body, ligaments are made up of (1) white fibres and some yellow elastic fibres (2) white fibres only (3) yellow fibres only (4) yellow fibres and muscle fibres

Last Answer : (1) white fibres and some yellow elastic fibres Explanation: A ligament is composed of dense fibrous bundles of collagenous fibres and spindle-shaped cells known as fibrocytes, with little ground ... ligament is rich in elastic fibres, which are quite tough even though they allow elastic movement.

State the function of muscle fibres.

Description : State the function of muscle fibres.

Last Answer : Muscle fibres or myofibres are specialized cells capable of contraction and relaxation that is responsible for movement of limbs, bending of the body, movement of internal organs like heart, stomach and alimentary canal.

The felderstrukter fibres of the extraocular musclea. form the bulk of the orbital part of the muscle b. have poorly developed sarcoplasmic reticulum c. are singly innervated d. are more richly supplied by blood than the fibrillenstrukter fibres

Description : The felderstrukter fibres of the extraocular musclea. form the bulk of the orbital part of the muscle b. have poorly developed sarcoplasmic reticulum c. are singly innervated d. are more richly supplied by blood than the fibrillenstrukter fibres

Last Answer : have poorly developed sarcoplasmic reticulum

The muscle spindles: a. are extrafusal fibres b. are innervated by type Ia and II fibres c. received motor innervation from the gamma fibres. d. respond to tension in the muscle

Description : The muscle spindles: a. are extrafusal fibres b. are innervated by type Ia and II fibres c. received motor innervation from the gamma fibres. d. respond to tension in the muscle

Last Answer : are innervated by type Ia and II fibres

Stretch reflex: a. is a monosynaptic reflex with a response time of 1 msec b. originates in the muscle spindle which sends off impulses in type Ia nerve fibres c. is intensified by impulses in the gamma efferent fibres d. all above

Description : Stretch reflex: a. is a monosynaptic reflex with a response time of 1 msec b. originates in the muscle spindle which sends off impulses in type Ia nerve fibres c. is intensified by impulses in the gamma efferent fibres d. all above

Last Answer : all above

Hypersecretion of growth hormone in adults does not cause further increase in height, because (a) epiphyseal plates close after adolescence (b) bones loose their sensitivity to growth hormone in adults (c) muscle fibres do not grow in size after birth (d) growth hormone becomes inactive in adults.

Description : Hypersecretion of growth hormone in adults does not cause further increase in height, because (a) epiphyseal plates close after adolescence (b) bones loose their sensitivity to growth hormone in adults (c) muscle fibres do not grow in size after birth (d) growth hormone becomes inactive in adults.

Last Answer : (a) epiphyseal plates close after adolescence

Blood capillaries are made of (a) endothelium, connective tissue and muscle fibres (b) endothelium and muscle fibres (c) endothelium and connective tissue (d) endothelium only.

Description : Blood capillaries are made of (a) endothelium, connective tissue and muscle fibres (b) endothelium and muscle fibres (c) endothelium and connective tissue (d) endothelium only.

Last Answer : d) endothelium only.

Bundle of His is a network of (a) muscle fibres distributed throughout the heart walls (b) muscle fibres found only in the ventricle wall (c) nerve fibres distributed in ventricles (d) nerve fibres found throughout the heart.

Description : Bundle of His is a network of (a) muscle fibres distributed throughout the heart walls (b) muscle fibres found only in the ventricle wall (c) nerve fibres distributed in ventricles (d) nerve fibres found throughout the heart.

Last Answer : (b) muscle fibres found only in the ventricle wall

Which one of the following is correct pairing of a body part and the kind of muscle tissue that moves it? (a) Biceps of upper arm – S m o o t h m u s c l e fibres (b) Abdominal wall – Smooth muscle (c) Iris – Involuntary smooth muscle (d) Heart wall – Involuntary unstriated muscle

Description : Which one of the following is correct pairing of a body part and the kind of muscle tissue that moves it? (a) Biceps of upper arm – S m o o t h m u s c l e fibres (b) Abdominal wall – Smooth muscle (c) Iris – Involuntary smooth muscle (d) Heart wall – Involuntary unstriated muscle

Last Answer : (b) Abdominal wall – Smooth muscle

The four sketches (A, B, C and D) given below, represent four different types of animal tissues. Which one of these is correctly identified in the options given, along with its correct location and function? (A) (B) (C) (D) Tissue Location Function (a) (B) Glandular Intestine Secretion epithelium (b) (C) Collagen Cartilage Attach skeletal fibres muscles to bones(c) (D) Smooth Heart Heart muscle contraction tissue (d) (A) Columnar Nephron Secretion epithelium and absorption

Description : The four sketches (A, B, C and D) given below, represent four different types of animal tissues. Which one of these is correctly identified in the options given, along with its ... Smooth Heart Heart muscle contraction tissue (d) (A) Columnar Nephron Secretion epithelium and absorption

Last Answer : (a) (B) Glandular Intestine Secretion epithelium

Hypersecretion of Growth Hormone in adults does not cause further increase in height, because: (1) Epiphyseal plates close after adolescence. (2) Bones loose their sensitivity to Growth Hormone in adults. (3) Muscle fibres do not grow in size after birth. (4) Growth Hormone becomes inactive in adults.

Description : Hypersecretion of Growth Hormone in adults does not cause further increase in height, because: (1) Epiphyseal plates close after adolescence. (2) Bones loose their sensitivity to Growth Hormone in adults. ( ... fibres do not grow in size after birth. (4) Growth Hormone becomes inactive in adults.

Last Answer : (1) Epiphyseal plates close after adolescence.

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

In human body, ligaments are made up of (1) white fibres and some yellow elastic fibres (2) white fibres only (3) yellow fibres only (4) yellow fibres and muscle fibres

Description : In human body, ligaments are made up of (1) white fibres and some yellow elastic fibres (2) white fibres only (3) yellow fibres only (4) yellow fibres and muscle fibres

Last Answer : white fibres and some yellow elastic fibres

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:

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

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`

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

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

Why are the vascular bundles of dicots called open bundles? -Biology

Description : Why are the vascular bundles of dicots called open bundles? -Biology

Last Answer : answer: