Welcome to your Ncert - class 9- science -Chapter 6 – Tissues 1
Rhythmical contraction is noticed in
The generation of excitation-contraction coupling involves all the following events except
In voluntary muscle movement, which of the following process occurs only if ATP is present?
Haemoglobin levels in the blood samples of two persons A and B are found to be 9 gm/dL and 13 gm/dL respectively. Which statement is true with respect to the amount of oxygen supply in their body?
Number of RBC increases if one lives at higher altitude because
Haversian canal in the bone of mammals are connected by small blood vessel canal called:
One of the factors required for the maturation of erythrocytes is
A man was brought up at sea level while his brother spent all his life at an altitude of 10,000 feet. The latter will have
Which is the correct sequence of arrangement of types of WBC in decreasing order in terms of number per mm^3 of human blood?
Which one of the following helps in keeping the body warm?
Read the statement regarding myofibril and choose the correct option:
Which of the following statements is incorrect?
A typical neuron has a myelin sheath insulating its axon. It is formed from cells known as Schwann cells. Some nervous system disorders, such as adrenoleukodystrophy result from the deterioration of the myelin sheath.
In a leaf, vascular bundles are found in:
The wax like substance present in the cell wall of onion skin is
In terms of descending order of percentage proportions of leucocytes in human blood, which one is correct?
Oxygen and carbon dioxide are transported in blood through.
Which of the following is the characteristic feature of cardiac muscles?
Which of these are granulocytes?
A blood cell is moved from an isotonic solution to a hypertonic solution. Select the correct condition.
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