Test-MCQ Class 10-NCERT -Science-Chapter 7-Test-3 Chapter 7: Control and Coordination Multiple Choice Questions No of Questions : 20 Marks: 20 Please enter your email: 1. The movement of sunflower in accordance with the path of sun is due to hydrotropism phototropism geotropism chemotropism 2. The substance that triggers the fall of mature leaves and fruits from plants is due to. gibberellin cytokinin auxin abscisic acid 3. Which of the following statements about transmission of nerve impulse is incorrect? A neuron transmits electrical impulses not only to another neuron but also to muscle and gland cells Nerve impulse travels from dendritic end towards axonal end The chemicals released from the axonal end of one neuron cross the synapse and generate a similar electrical impulse in a dendrite of another neuron At the dendritic end electrical impulses bring about the release of some chemicals which generate an electrical impulse at the axonal end of another neuron 4. Involuntary actions in the body are controlled by medulla in spinal cord medulla in hind brain medulla in mid brain medulla in fore brain 5. Which of the following is not an involuntary action? Salivation Chewing Heart beat Vomiting 6. When a person is suffering from severe cold, he or she cannot differentiate a hot object from a cold object differentiate the taste of an apple from that of an ice cream differentiate the smell of a perfume from that of an agarbatti differentiate red light from green light 7. Which statement is not true about thyroxin? Thyroxin is also called thyroid hormone Iron is essential for the synthesis of thyroxin It regulates carbohydrates, protein and fat metabolism in the body Thyroid gland requires iodine to synthesise thyroxin 8. Dwarfism results due to Excess secretion of growth hormone Excess secretion of thyroxin Less secretion of growth hormone Less secretion of adrenaline 9. Dramatic changes of body features associated with puberty are mainly because of secretion of estrogen from adrenal gland and testosterone from pituitary gland testosterone from testes and estrogen from ovary testosterone from thyroid gland and estrogen from pituitary gland oestrogen from testes and testosterone from ovary 10. A doctor advised a person to take an injection of insulin because his heart was beating slowly he was suffering from goitre his blood pressure was low his sugar level in blood was high 11. The hormone which increases the fertility in males is called growth hormone testosterone oestrogen insulin 12. Which of the following endocrine glands is unpaired? Testes Adrenal Ovary Pituitary 13. Junction between two neurons is called neural joint cell junction neuro muscular junction synapse 14. In humans, the life processes are controlled and regulated by reproductive and endocrine systems endocrine and digestive systems respiratory and nervous systems nervous and endocrine systems 15. The centre of sense of smell in the brain is midbrain cerebrum olfactory lobe cerebellum 16. Which body organ is surrounded by meninges spinal cord and lungs hear ansd lun brain and spinal cord brain and heart 17. Layer covering spinal cord is meninges plasma membrane pleural membrane pericardium 18. The cells in our body that can be over a foot long are _____. Nerve cells Blood cells Bone cells Muscle cells 19. Gibberellins were discovered from mosses algae bacteria fungi 20. Which of the following controls riding a bicycle? Cerebellum Pons Cerebrum Medulla Please Enter Your Name, School Name & Class in the given below box and submit: ( results will be shown after submit, within few moments on same the page ) Loading … Question 1 of 21
