Question 14 Marks
Muscular tissue consists of elongated cells, also called muscle fibres. This tissue is responsible for movement in our body. Muscles contain special proteins called contractile proteins, which contract and relax to cause movementWe can move some muscles by conscious will. Such muscles are called voluntary muscles. These muscles are also called skeletal muscles as they are mostly attached to bones and help in body movement. Under the microscope, these muscles show alternate light and dark bands or striations, hence they are also called striated muscles. The cells of this tissue are long, cylindrical, unbranched and multinucleate.
The movement of food in the alimentary canal or the contraction and relaxation of blood vessels are involuntary movements. We can’t control these muscle movement. The Smooth muscles or involuntary muscles control such movements. They are also found in the iris of the eye, in ureters and in the bronchi of the lungs. The cells are long with pointed ends (spindle-shaped) and uninucleate. They are also called unstriated muscles.
The muscles of the heart show rhythmic contraction and relaxation throughout life. These involuntary muscles are called cardiac. Heart muscle cells are cylindrical, branched and uninucleate.
(1) Which of the following muscle tissue are voluntary in nature?
$(a)$ Cardiac muscle
$(b)$ Smooth muscle
$(c)$ auto rhythmic muscle
$(d)$ None of the above
(2) The muscles whose contraction is under our control are known as
$(a)$ Voluntary muscles
$(b)$ Involuntary movements
$(c)$ Cardiac muscle
$(d)$ Unstrained muscle
(3) The smooth muscle are found in the
$(a)$ Iris of eye
$(b)$ Uterus
$(c)$ Bronchi of lungs
$(d)$ All of above
(4) Give the characteristic of striated muscles.
(5) Give the characteristic of unstriated muscles.
The movement of food in the alimentary canal or the contraction and relaxation of blood vessels are involuntary movements. We can’t control these muscle movement. The Smooth muscles or involuntary muscles control such movements. They are also found in the iris of the eye, in ureters and in the bronchi of the lungs. The cells are long with pointed ends (spindle-shaped) and uninucleate. They are also called unstriated muscles.
The muscles of the heart show rhythmic contraction and relaxation throughout life. These involuntary muscles are called cardiac. Heart muscle cells are cylindrical, branched and uninucleate.
(1) Which of the following muscle tissue are voluntary in nature?
$(a)$ Cardiac muscle
$(b)$ Smooth muscle
$(c)$ auto rhythmic muscle
$(d)$ None of the above
(2) The muscles whose contraction is under our control are known as
$(a)$ Voluntary muscles
$(b)$ Involuntary movements
$(c)$ Cardiac muscle
$(d)$ Unstrained muscle
(3) The smooth muscle are found in the
$(a)$ Iris of eye
$(b)$ Uterus
$(c)$ Bronchi of lungs
$(d)$ All of above
(4) Give the characteristic of striated muscles.
(5) Give the characteristic of unstriated muscles.
Answer
View full question & answer→$(1) D$
$(2) A$
$(3) D$
$(4)$ Characteristic of striated muscles,
$(2) A$
$(3) D$
$(4)$ Characteristic of striated muscles,
- These muscles show alternate light and dark bands or striations, hence they are also called striated muscles.
- The cells of this tissue are long, cylindrical, unbranched and multinucleate.
- The cells of this tissue are long with pointed ends spindle-shaped and uninucleate.
- Striations are absent, hence they are also called unstriated muscles.
