HSC Science (General) 12th Standard Board Exam - Maharashtra State Board Important Questions

Give any three differences between an artery and a vein

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.

Degeneration of dopamine producing neurons in the CNS causes ______ disease.

‘Injury to the medulla oblongata causes sudden death’ Explain.

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.

Describe any four hormones secreted by Adenohypophysis. 

State properties of hormones.

Sketch and label – Structure of Antibody