Unit Test: Control and Coordination | Science Class 10 PDF Download

Time: 1 hour

M.M. 30

Attempt all questions.

• Question numbers 1 to 5 carry 1 mark each.
• Question numbers 6 to 8 carry 2 marks each.
• Question numbers 9 to 11 carry 3 marks each.
• Question number 12 & 13 carry 5 marks each

Q1: What is the function of the pituitary gland? (1 Mark)
(a) To develop sex organs in males
b) To stimulate growth in all organs
(c) To regulate sugar and salt levels in the body
(d) To initiate metabolism in the body

Q2: A female is suffering from an irregular menstrual cycle. The doctor prescribed her some hormonal tablets. Which option shows that the hormone she lacks in her body is from the endocrine gland? (1 Mark)
(a) Oestrogen
(b) Testosterone
(c) Adrenalin
(d) Thyroxin

Q3: Name two tissues which provide control and coordination in animals. (1 Mark)

Q4: Name the plant hormone that inhibits growth and also helps in wilting of leaves. (1 Mark)

Q5: Which is the largest and most prominent part of the brain? (1 Mark)

Q6: Why does the flow of signals in a synapse from axonal end of one neuron to dendritic end of another neuron take place but not in the reverse direction? Explain. (2 Marks)

Q7: State the two types of movements seen in plants. Give one example of each type. (2 Marks)

Q8: Define phototropism. Name the plant hormone which is responsible for phototropism. (2 Marks)

Q9: Mention three major regions of brain. Write one function of each. (3 Marks)

Q10: A squirrel is in a scary situation. Its body has to prepare for either fighting or running away. State the immediate changes that take place in its body so that the squirrel is able to either fight or run. (3 Marks)

Q11: Name any three endocrine glands in human body and briefly write the function of each of them. (3 Marks)

Q12: Why is chemical communication better than electrical impulses as a means of communication between cells in a multicellular organisms? (5 Marks)

Q13:
(a) Name the hormone which is released into the blood when its sugar level rises. Explain the need of Chemical communication in multicellular organisms the organ which produces this hormone and its effect on blood sugar level. Also mention the digestive enzymes secreted by this organ with one function of each.
(b) Explain the need of Chemical communication in multicellular organisms. (5 Marks)