Biology · Class 10 CBSE
A student accidentally touches a hot iron and immediately pulls back his hand before realizing it is hot. Which statement best explains this response?
A plant kept near a window bends towards the sunlight after a few days. Which explanation best describes this phenomenon?
A person has difficulty maintaining balance while walking but can still think and speak normally. Which part of the brain is most likely affected?
Which situation demonstrates the role of hormones rather than the nervous system?
A patient suffers damage to sensory nerves in the hand. What is the most likely consequence?
A diabetic patient does not produce enough insulin. Which process is directly affected?
A plant is placed horizontally. After a few days, its shoot grows upward while its roots grow downward. This response is due to:
Which statement correctly compares nervous control and hormonal control?
A person suddenly sees a bright flash of light and closes their eyes immediately. Which body system is mainly responsible for this quick response?
A patient has damage to the medulla oblongata. Which function is most likely to be affected?
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Why are reflex actions faster than voluntary actions? Explain using the reflex arc.
2 marksA gardener notices that the stem of a potted plant bends towards sunlight. Explain the role of auxin in this movement.
2 marksDifferentiate between nervous control and hormonal control on the basis of: - Speed of response - Duration of effect
2 marksWhy is insulin considered an important hormone? What may happen if the body does not produce enough insulin?
2 marksA student accidentally steps on a sharp pin. Explain the pathway of nerve impulses from the foot to the muscles during this reflex action.
2 marksExplain the structure and working of a reflex arc with the help of a suitable example. Also explain why reflex actions are important for human survival.
5 marksDescribe the human brain under the following headings: - Cerebrum - Cerebellum - Medulla State one important function of each and explain how they work together to coordinate body activities.
5 marksCase study: Neha was watering plants on her balcony. She observed that the potted plant placed near the window had bent towards sunlight over the week. At the same time, she accidentally touched a hot utensil and immediately pulled her hand back. Answer the following questions: (a) Which plant hormone is mainly responsible for the bending of the shoot towards light?
1 markCase study: Neha was watering plants on her balcony. She observed that the potted plant placed near the window had bent towards sunlight over the week. At the same time, she accidentally touched a hot utensil and immediately pulled her hand back. Answer the following questions: (b) Name the type of tropic movement shown by the plant.
1 markCase study: Neha was watering plants on her balcony. She observed that the potted plant placed near the window had bent towards sunlight over the week. At the same time, she accidentally touched a hot utensil and immediately pulled her hand back. Answer the following questions: (c) Why did Neha pull her hand back before she even realized the utensil was hot?
1 markCase study: Neha was watering plants on her balcony. She observed that the potted plant placed near the window had bent towards sunlight over the week. At the same time, she accidentally touched a hot utensil and immediately pulled her hand back. Answer the following questions: (d) Differentiate between the coordination involved in the plant\'s response and the human reflex action.
1 mark