HSC Science (General) इयत्ता १२ वी - Maharashtra State Board Important Questions

Write the name of Standard bioassay method for auxins.

Write full form of IBA

Write full form of NAA

With the help of a suitable diagram, describe the conducting system of the human heart.

Explain with the help of a suitable diagram conducting system of human heart.

Sketch and label T.S. of human artery.

Find out the example in which due to absence of respiratory pigment transport of respiratory gases does not takes place.

Define Bohr effect and Haldane effect.

Draw diagram of conducting system of human heart. Label SA node and bundle of His.

Write a note on Hering-Breuer reflex.

Draw the chart of double circulation and label A, B, C and D.

Define hypertension. Explain coronary artery disease and angina pectoris.

Draw labelled diagram of internal structure of human heart.

Label right atrium, mitral valve, left ventricle and pulmonary semilunar valve.

Write a function of Eustachian and tricuspid valve found in human heart.

With the help of a neat and labelled diagram, describe reflex arc.

Describe the T. S. of thyroid gland

Short answer question

List the properties of the nerve fibres.

Sketch and label T. S. of Spinal cord.

Name three Mixed cranial nerves along with their numbers.

Distinguish between

Cerebrum and Cerebellum.

Answer the questions after observing the diagram given below.

1. What acts as the first messenger?
2. Why can’t hormones like catecholamines enter their target cells through plasma membrane?
3. Name the mode of hormone action shown in the diagram.