NCERT Class 10 Science — Chapter 2: Control and Coordination

Match the plant hormone with its primary effect: List I | List II A. Auxin | 1. Promotes rapid cell division B. Gibberellins | 2. Inhibits growth and causes wilting C. Cytokinins | 3. Promotes growth of stem D. Abscisic acid | 4. Promotes cell elongation and bending towards light Select the correct answer using the code given below

The growth of the pollen tube towards the ovule is an example of which type of movement?

Hyposecretion of Growth Hormone during childhood typically results in:

The centre for hunger and satiety is located in which part of the human brain?

Match the part of the nervous system with its function: List I | List II A. Fore-brain | 1. Precision of voluntary actions and balance B. Medulla | 2. Involuntary actions like blood pressure and vomiting C. Cerebellum | 3. Integration of sensory inputs and voluntary control D. Peripheral nervous system | 4. Nerves linking the central nervous system with the body Select the correct answer using the code given below

A patient with cerebellar dysfunction is most likely to have difficulty with:

Which region of the brain contains the centres regulating body temperature and the urge for eating?

Which of the following physiological functions is primarily controlled by the medulla oblongata?

The functional junction between two neurons across which nerve impulses are transmitted is known as:

Which phytohormone is often referred to as the 'stress hormone' due to its role in stimulating stomatal closure?

Directional growth movements in plants induced by external stimuli such as light or gravity are termed:

Which plant hormone is primarily associated with the inhibition of growth and the induction of dormancy?

Consider the following about rapid leaf-folding in a sensitive plant: 1. It is strictly dependent on directional growth. 2. Information transmission occurs without specialised conduction tissue. 3. Cells change their shape by altering their protein structure. Which of the above are correct?

Consider the following statements about insulin: 1. It is produced by the liver. 2. It helps regulate blood sugar levels. 3. Its deficiency can lead to harmful elevation of blood sugar. Which of the statements given above is/are correct?

The reflex centre controlling the act of vomiting is located in the:

Growth Hormone (GH) is secreted by which endocrine gland?

Which plant hormone is primarily responsible for promoting rapid cell division, especially in fruits and seeds?

Assertion (A): Reflex arcs are formed in the spinal cord. Reason (R): Reflex actions are involuntary responses to peripheral nervous stimulation.

With reference to sensory reception, consider the following statements: 1. Gustatory receptors detect taste. 2. Olfactory receptors are specialised to detect taste. 3. These receptors are specialised tips of some nerve cells. 4. All receptors are present only in the skin. Which of the statements given above are correct?

Which part of the human brain is primarily responsible for maintaining posture, balance, and equilibrium, such as when riding a bicycle?

Which of the following is/are correct about reflex actions? 1. Reflex completion strictly requires prior processing by the fore-brain. 2. During a reflex, information may still reach the brain.

Consider the following statements about electrical impulses in animals: 1. They reach only those cells that are connected by nervous tissue. 2. A cell can transmit impulses continuously without any reset time. 3. Impulses are generated by the movement of ions across the membrane. Which of the above are correct?

Assertion (A): Auxin is synthesised at the shoot tip and helps the cells to grow longer. Reason (R): When light is coming from one side of the plant, auxin diffuses towards the illuminated side of the shoot.

Match the hormone with its source gland: List I | List II A. Adrenaline | 1. Pancreas B. Insulin | 2. Thyroid C. Thyroxin | 3. Pituitary D. Growth hormone | 4. Adrenal Select the correct answer using the code given below

Assertion (A): A deficiency of iodine in the diet can lead to the enlargement of the thyroid gland. Reason (R): Iodine is essential for the synthesis of thyroxin, which regulates carbohydrate, protein, and fat metabolism.

Consider the following statements about nervous tissue: 1. It is made up of a randomly arranged network of epithelial cells. 2. It is specialised for conducting information via electrical impulses. 3. Neurons are the excitable cells of the nervous system. Which of the above are correct?

In the human body, gustatory receptors are primarily located on the: