(c) Tendon is dense regular connective tissue. Adipose tissue is a type of loose connective tissue located mainly beneath the cells. Cartilage is a type of specialised connective tissue.
NCERT Page-103
Structural Organization in Animals(NCERT)
286875
Muscle tissue cells are contractile, which means they
1 are responsible for the production and secretion of enzymes.
2 are specialized in contraction and relaxation.
3 help in the movement of involuntary organs only.
4 all of the above
Explanation:
(b) Muscle tissue plays the vital role of providing movement and heat generation to the organs of the
body. Muscle cells are specialized for contractility and electrical conductivity.
NCERT Page-104
Structural Organization in Animals(NCERT)
286876
The fibres of which of the following muscles are fusiform and do not show striations
1 Skeletal muscles
2 Cardiac muscles
3 Both (a.)and (b)
4 Smooth muscles
Explanation:
(d) Cells of smooth muscle tissue are spindle shaped and pointed at their ends. Striations are absent due to different arrangement of actin and myosin filaments. Smooth muscle is the earliest form of muscle to evolve.
NCERT Page-105
Structural Organization in Animals(NCERT)
286877
Intercalated discs are the communication junctions between the cells of
1 cardiac muscles
2 striped muscles
3 adipose tissue
4 nerve and striated muscles
Explanation:
(a) Cardiac muscles are involuntary, cross striated & non-fatigued fibres. Cell junctions fuse the plasma membranes of cardiac muscle cells and make them stick together. Communication junctions (intercalated discs) at some fusion points allow the cells to contract as a unit, i.e., when one cell receives a signal to contract, its neighbouring cells are also stimulated to contract.
(c) Tendon is dense regular connective tissue. Adipose tissue is a type of loose connective tissue located mainly beneath the cells. Cartilage is a type of specialised connective tissue.
NCERT Page-103
Structural Organization in Animals(NCERT)
286875
Muscle tissue cells are contractile, which means they
1 are responsible for the production and secretion of enzymes.
2 are specialized in contraction and relaxation.
3 help in the movement of involuntary organs only.
4 all of the above
Explanation:
(b) Muscle tissue plays the vital role of providing movement and heat generation to the organs of the
body. Muscle cells are specialized for contractility and electrical conductivity.
NCERT Page-104
Structural Organization in Animals(NCERT)
286876
The fibres of which of the following muscles are fusiform and do not show striations
1 Skeletal muscles
2 Cardiac muscles
3 Both (a.)and (b)
4 Smooth muscles
Explanation:
(d) Cells of smooth muscle tissue are spindle shaped and pointed at their ends. Striations are absent due to different arrangement of actin and myosin filaments. Smooth muscle is the earliest form of muscle to evolve.
NCERT Page-105
Structural Organization in Animals(NCERT)
286877
Intercalated discs are the communication junctions between the cells of
1 cardiac muscles
2 striped muscles
3 adipose tissue
4 nerve and striated muscles
Explanation:
(a) Cardiac muscles are involuntary, cross striated & non-fatigued fibres. Cell junctions fuse the plasma membranes of cardiac muscle cells and make them stick together. Communication junctions (intercalated discs) at some fusion points allow the cells to contract as a unit, i.e., when one cell receives a signal to contract, its neighbouring cells are also stimulated to contract.
(c) Tendon is dense regular connective tissue. Adipose tissue is a type of loose connective tissue located mainly beneath the cells. Cartilage is a type of specialised connective tissue.
NCERT Page-103
Structural Organization in Animals(NCERT)
286875
Muscle tissue cells are contractile, which means they
1 are responsible for the production and secretion of enzymes.
2 are specialized in contraction and relaxation.
3 help in the movement of involuntary organs only.
4 all of the above
Explanation:
(b) Muscle tissue plays the vital role of providing movement and heat generation to the organs of the
body. Muscle cells are specialized for contractility and electrical conductivity.
NCERT Page-104
Structural Organization in Animals(NCERT)
286876
The fibres of which of the following muscles are fusiform and do not show striations
1 Skeletal muscles
2 Cardiac muscles
3 Both (a.)and (b)
4 Smooth muscles
Explanation:
(d) Cells of smooth muscle tissue are spindle shaped and pointed at their ends. Striations are absent due to different arrangement of actin and myosin filaments. Smooth muscle is the earliest form of muscle to evolve.
NCERT Page-105
Structural Organization in Animals(NCERT)
286877
Intercalated discs are the communication junctions between the cells of
1 cardiac muscles
2 striped muscles
3 adipose tissue
4 nerve and striated muscles
Explanation:
(a) Cardiac muscles are involuntary, cross striated & non-fatigued fibres. Cell junctions fuse the plasma membranes of cardiac muscle cells and make them stick together. Communication junctions (intercalated discs) at some fusion points allow the cells to contract as a unit, i.e., when one cell receives a signal to contract, its neighbouring cells are also stimulated to contract.
(c) Tendon is dense regular connective tissue. Adipose tissue is a type of loose connective tissue located mainly beneath the cells. Cartilage is a type of specialised connective tissue.
NCERT Page-103
Structural Organization in Animals(NCERT)
286875
Muscle tissue cells are contractile, which means they
1 are responsible for the production and secretion of enzymes.
2 are specialized in contraction and relaxation.
3 help in the movement of involuntary organs only.
4 all of the above
Explanation:
(b) Muscle tissue plays the vital role of providing movement and heat generation to the organs of the
body. Muscle cells are specialized for contractility and electrical conductivity.
NCERT Page-104
Structural Organization in Animals(NCERT)
286876
The fibres of which of the following muscles are fusiform and do not show striations
1 Skeletal muscles
2 Cardiac muscles
3 Both (a.)and (b)
4 Smooth muscles
Explanation:
(d) Cells of smooth muscle tissue are spindle shaped and pointed at their ends. Striations are absent due to different arrangement of actin and myosin filaments. Smooth muscle is the earliest form of muscle to evolve.
NCERT Page-105
Structural Organization in Animals(NCERT)
286877
Intercalated discs are the communication junctions between the cells of
1 cardiac muscles
2 striped muscles
3 adipose tissue
4 nerve and striated muscles
Explanation:
(a) Cardiac muscles are involuntary, cross striated & non-fatigued fibres. Cell junctions fuse the plasma membranes of cardiac muscle cells and make them stick together. Communication junctions (intercalated discs) at some fusion points allow the cells to contract as a unit, i.e., when one cell receives a signal to contract, its neighbouring cells are also stimulated to contract.
