(d) Smooth muscle is an involuntary, spindle shaped, uninucleated, tapering and non-striated muscle. Smooth muscle is responsible for the contractility of hollow organs, such as blood vessels, the gastrointestinal tract, the bladder, or the uterus.
Structural Organization in Animals(NCERT)
286879
Which of the following statement(s) is/are correct about muscle tissue?
1 Each muscle is made of many long, cylindrical fibres arranged in parallel arrays.
2 Muscle fibres contract (shorten) in response to stimulation, then relax (lengthen) and return to their uncontracted state in a coordinated fashion.
3 Muscles play an active role in all movements of the body.
4 All of the above
Explanation:
(d) Muscle tissue is contractile tissue grouped into coordinated systems for greater efficiency. In humans the muscle systems are classified by gross appearance and location of cells. The three types of muscles are striated (or skeletal), cardiac, and smooth (or nonstriated).
NCERT Page-104
Structural Organization in Animals(NCERT)
286880
Three essential components of most neurons are
1 simple epithelium, extracellular matrix and nerves.
2 axon, dendrites and cell body.
3 nerve cells, synapse and neuroglia.
4 mylein sheeth, node of Ranvier and Schwann cells.
Explanation:
(b) A neuron is an electrically excitable cell that processes and transmits information through electrical and chemical signals. These signals between neurons occur via synapses, specialized connections with other cells. A typical neuron possesses a cell body (soma), dendrites, and an axon.
NCERT Page-105
Structural Organization in Animals(NCERT)
286881
Neuroglia are
1 excitable cells of neural tissue.
2 supporting and non-protecting cells of neural tissue.
3 two to three times in volume of neural tissue.
4 protective and excitable cells of neural tissue.
Explanation:
(b) Neurons forms the structural and functional unit of nervous tissue. They are excitable cells. While the neuroglial cells constitute the rest of the neural system that protect and support neurons and are non-excitable.
NCERT Page-105
Structural Organization in Animals(NCERT)
286882
Nervous tissue cells that play several supporting roles but do not transmit impulses are called
1 glial cells
2 dendrites
3 nerve cells
4 neurons
Explanation:
(a) The neuroglial cells are non-excitable cells that protect and support neurons.
(d) Smooth muscle is an involuntary, spindle shaped, uninucleated, tapering and non-striated muscle. Smooth muscle is responsible for the contractility of hollow organs, such as blood vessels, the gastrointestinal tract, the bladder, or the uterus.
Structural Organization in Animals(NCERT)
286879
Which of the following statement(s) is/are correct about muscle tissue?
1 Each muscle is made of many long, cylindrical fibres arranged in parallel arrays.
2 Muscle fibres contract (shorten) in response to stimulation, then relax (lengthen) and return to their uncontracted state in a coordinated fashion.
3 Muscles play an active role in all movements of the body.
4 All of the above
Explanation:
(d) Muscle tissue is contractile tissue grouped into coordinated systems for greater efficiency. In humans the muscle systems are classified by gross appearance and location of cells. The three types of muscles are striated (or skeletal), cardiac, and smooth (or nonstriated).
NCERT Page-104
Structural Organization in Animals(NCERT)
286880
Three essential components of most neurons are
1 simple epithelium, extracellular matrix and nerves.
2 axon, dendrites and cell body.
3 nerve cells, synapse and neuroglia.
4 mylein sheeth, node of Ranvier and Schwann cells.
Explanation:
(b) A neuron is an electrically excitable cell that processes and transmits information through electrical and chemical signals. These signals between neurons occur via synapses, specialized connections with other cells. A typical neuron possesses a cell body (soma), dendrites, and an axon.
NCERT Page-105
Structural Organization in Animals(NCERT)
286881
Neuroglia are
1 excitable cells of neural tissue.
2 supporting and non-protecting cells of neural tissue.
3 two to three times in volume of neural tissue.
4 protective and excitable cells of neural tissue.
Explanation:
(b) Neurons forms the structural and functional unit of nervous tissue. They are excitable cells. While the neuroglial cells constitute the rest of the neural system that protect and support neurons and are non-excitable.
NCERT Page-105
Structural Organization in Animals(NCERT)
286882
Nervous tissue cells that play several supporting roles but do not transmit impulses are called
1 glial cells
2 dendrites
3 nerve cells
4 neurons
Explanation:
(a) The neuroglial cells are non-excitable cells that protect and support neurons.
(d) Smooth muscle is an involuntary, spindle shaped, uninucleated, tapering and non-striated muscle. Smooth muscle is responsible for the contractility of hollow organs, such as blood vessels, the gastrointestinal tract, the bladder, or the uterus.
Structural Organization in Animals(NCERT)
286879
Which of the following statement(s) is/are correct about muscle tissue?
1 Each muscle is made of many long, cylindrical fibres arranged in parallel arrays.
2 Muscle fibres contract (shorten) in response to stimulation, then relax (lengthen) and return to their uncontracted state in a coordinated fashion.
3 Muscles play an active role in all movements of the body.
4 All of the above
Explanation:
(d) Muscle tissue is contractile tissue grouped into coordinated systems for greater efficiency. In humans the muscle systems are classified by gross appearance and location of cells. The three types of muscles are striated (or skeletal), cardiac, and smooth (or nonstriated).
NCERT Page-104
Structural Organization in Animals(NCERT)
286880
Three essential components of most neurons are
1 simple epithelium, extracellular matrix and nerves.
2 axon, dendrites and cell body.
3 nerve cells, synapse and neuroglia.
4 mylein sheeth, node of Ranvier and Schwann cells.
Explanation:
(b) A neuron is an electrically excitable cell that processes and transmits information through electrical and chemical signals. These signals between neurons occur via synapses, specialized connections with other cells. A typical neuron possesses a cell body (soma), dendrites, and an axon.
NCERT Page-105
Structural Organization in Animals(NCERT)
286881
Neuroglia are
1 excitable cells of neural tissue.
2 supporting and non-protecting cells of neural tissue.
3 two to three times in volume of neural tissue.
4 protective and excitable cells of neural tissue.
Explanation:
(b) Neurons forms the structural and functional unit of nervous tissue. They are excitable cells. While the neuroglial cells constitute the rest of the neural system that protect and support neurons and are non-excitable.
NCERT Page-105
Structural Organization in Animals(NCERT)
286882
Nervous tissue cells that play several supporting roles but do not transmit impulses are called
1 glial cells
2 dendrites
3 nerve cells
4 neurons
Explanation:
(a) The neuroglial cells are non-excitable cells that protect and support neurons.
(d) Smooth muscle is an involuntary, spindle shaped, uninucleated, tapering and non-striated muscle. Smooth muscle is responsible for the contractility of hollow organs, such as blood vessels, the gastrointestinal tract, the bladder, or the uterus.
Structural Organization in Animals(NCERT)
286879
Which of the following statement(s) is/are correct about muscle tissue?
1 Each muscle is made of many long, cylindrical fibres arranged in parallel arrays.
2 Muscle fibres contract (shorten) in response to stimulation, then relax (lengthen) and return to their uncontracted state in a coordinated fashion.
3 Muscles play an active role in all movements of the body.
4 All of the above
Explanation:
(d) Muscle tissue is contractile tissue grouped into coordinated systems for greater efficiency. In humans the muscle systems are classified by gross appearance and location of cells. The three types of muscles are striated (or skeletal), cardiac, and smooth (or nonstriated).
NCERT Page-104
Structural Organization in Animals(NCERT)
286880
Three essential components of most neurons are
1 simple epithelium, extracellular matrix and nerves.
2 axon, dendrites and cell body.
3 nerve cells, synapse and neuroglia.
4 mylein sheeth, node of Ranvier and Schwann cells.
Explanation:
(b) A neuron is an electrically excitable cell that processes and transmits information through electrical and chemical signals. These signals between neurons occur via synapses, specialized connections with other cells. A typical neuron possesses a cell body (soma), dendrites, and an axon.
NCERT Page-105
Structural Organization in Animals(NCERT)
286881
Neuroglia are
1 excitable cells of neural tissue.
2 supporting and non-protecting cells of neural tissue.
3 two to three times in volume of neural tissue.
4 protective and excitable cells of neural tissue.
Explanation:
(b) Neurons forms the structural and functional unit of nervous tissue. They are excitable cells. While the neuroglial cells constitute the rest of the neural system that protect and support neurons and are non-excitable.
NCERT Page-105
Structural Organization in Animals(NCERT)
286882
Nervous tissue cells that play several supporting roles but do not transmit impulses are called
1 glial cells
2 dendrites
3 nerve cells
4 neurons
Explanation:
(a) The neuroglial cells are non-excitable cells that protect and support neurons.
(d) Smooth muscle is an involuntary, spindle shaped, uninucleated, tapering and non-striated muscle. Smooth muscle is responsible for the contractility of hollow organs, such as blood vessels, the gastrointestinal tract, the bladder, or the uterus.
Structural Organization in Animals(NCERT)
286879
Which of the following statement(s) is/are correct about muscle tissue?
1 Each muscle is made of many long, cylindrical fibres arranged in parallel arrays.
2 Muscle fibres contract (shorten) in response to stimulation, then relax (lengthen) and return to their uncontracted state in a coordinated fashion.
3 Muscles play an active role in all movements of the body.
4 All of the above
Explanation:
(d) Muscle tissue is contractile tissue grouped into coordinated systems for greater efficiency. In humans the muscle systems are classified by gross appearance and location of cells. The three types of muscles are striated (or skeletal), cardiac, and smooth (or nonstriated).
NCERT Page-104
Structural Organization in Animals(NCERT)
286880
Three essential components of most neurons are
1 simple epithelium, extracellular matrix and nerves.
2 axon, dendrites and cell body.
3 nerve cells, synapse and neuroglia.
4 mylein sheeth, node of Ranvier and Schwann cells.
Explanation:
(b) A neuron is an electrically excitable cell that processes and transmits information through electrical and chemical signals. These signals between neurons occur via synapses, specialized connections with other cells. A typical neuron possesses a cell body (soma), dendrites, and an axon.
NCERT Page-105
Structural Organization in Animals(NCERT)
286881
Neuroglia are
1 excitable cells of neural tissue.
2 supporting and non-protecting cells of neural tissue.
3 two to three times in volume of neural tissue.
4 protective and excitable cells of neural tissue.
Explanation:
(b) Neurons forms the structural and functional unit of nervous tissue. They are excitable cells. While the neuroglial cells constitute the rest of the neural system that protect and support neurons and are non-excitable.
NCERT Page-105
Structural Organization in Animals(NCERT)
286882
Nervous tissue cells that play several supporting roles but do not transmit impulses are called
1 glial cells
2 dendrites
3 nerve cells
4 neurons
Explanation:
(a) The neuroglial cells are non-excitable cells that protect and support neurons.
