(English Medium) ICSE Class 10 - CISCE Question Bank Solutions

How are cytons and axons arranged in the spinal cord?

Name the following:

The organelle that forms the aster during cell division.

Given below is the transverse section of the spinal cord. Read the information below the diagram and fill in the blanks:

The spinal cord extends from the medulla oblongata of the brain and runs down through the whole length of the vertebral column. The spinal cord is covered by the meninges. It conducts impulses from the skin and muscles to the brain. It also conducts impulses from the brain to the muscles of the trunk and limbs.

The spinal cord is a part of the (a) ______ Nervous System. The grey matter in the picture given above consists of (b) ______ while the white matter consists of (c) ______. The spinal cord is concerned with the (d) ______ actions below the neck. (e) ______ is the bony structure that protects the spinal cord.

Ventricles have ______ walls when compared with those of auricles.

Can you answer why the pulmonary artery shown in Fig. is blue in colour?

Name the following:

Contraction phase of heart.

Name the following:

The structure that holds the heart valves in position.

Mention the phase of heart beat in which both the atrio-ventricular valves are closed.

What are the normal values of blood pressure in a normal human adult?

Name these:

Three components of circulatory system.

Name these:

Three circulating fluids in human body.

Name these:

Two kinds of circulatory systems in different animals.

The valve which prevents back flow of blood in the veins and lymph vessels is ______.

Given diagram is a schematic representation of the circulatory system in humans. Study the same and answer the questions that follow:

1. Label the parts 1 and 4 indicated in the diagram.
2. Which of the above mentioned number is the thickest artery? Also write its name.
3. Mention the number and chamber of the heart which has the thickest muscular wall.
4. Which of the above numbers/structures has the maximum number of blood capillaries?
5. Draw neat and labelled diagrams of the transverse section of vena cava and the part numbered as 3. Make sure to show the structural differences between these two in the diagram.

Mention where in the human body is the following located and state its main function:

Central canal

The prime source of chlorofluorocarbons is ______.

The exchange of chromatid parts between the maternal and the paternal chromatids of a pair of homologous chromosomes during meiosis.

Draw a labelled diagram to show the metaphase stage of mitosis in an animal cell having ‘6’ chromosomes. 

Given below are three diagrammatic sketches (A, B and C) of one and the same particular phase during mitotic type of cell division.

1. Identify the phase.
2. What is the diploid number of chromosomes shown in them?
3. Identify whether these are animal cells or plant cells? Give reasons.
4. Which of these is/are shown in the correct direction?
   1. Only A
   2. Only B
   3. Only A and C
   4. All the three

Given below is a diagram representing a stage during the mitotic cell division. Study thediagram  and answer the following questions:

 Identify the stage by giving a suitable reason.