EXERCISE
Anurag Chandra Biology Solutions for EXERCISE
Simple step-by-step solutions to EXERCISE questions of Control and Coordination from Eduwiser's CBSE BIOLOGY For Class X. Also get 3D topic explainers, cheat sheets, and unlimited doubts solving on EMBIBE.
Questions from EXERCISE with Hints & Solutions
Deficiency of which hormone leads to dwarfism?
How do muscle cells move?
A person visits a doctor with a lump in his neck.
Name the disease this person may be suffering from. (Hepatitis/Goitre/Diabetes)
A person visits a doctor with a lump in his neck. Name the mineral whose deficiency in the diet causes this disease. (Write in word)
A person visits a doctor with a lump in his neck.
Name other symptoms associated with the disease.
A neuron consists of (1), (2) and (3). The (1) contains most of the cell organelles except (4). The (2) conduct nerve impulses to the (1). (3) vary in length and can measure anything from a few mm to a meter. Most neurons are surrounded by a white insulating sheath called (5). Between the segments of (5) are gaps called the (6). The (3) has a swollen end called bulb that stores a chemical called (7).
| Disease Name | Reason | Gland |
| Cushing disease | (a) | Adrenal gland |
| (b) | Low cortisol | (c) |
| (d) | Insulin | (e) |
| (f) | Iodine deficiency | (g) |
| Dwarfism | (h) | (i) |
Some steps related to the transmission of information through the nervous system are given in the table below. The steps are not in the correct order. Write numbers 1 to 10 in the first column to get the correct order of steps involved:
| S.No. | Description of the Step |
| 1. | Stimulus provides the information. |
| 2. | The electrical impulse travels along the dendrite. |
| 3. | An electrical impulse is created at the dendrite. |
| 4. | Information is acquired at the end of the dendrite tip of the nerve cell. |
| 5. | The electrical impulse travels from the cell body to axon to the end of an axon. |
| 6. | The chemicals cross the synapse and reach the dendrite of the next neuron. |
| 7. | The information sets off a chemical reaction. |
| 8. | The electrical impulse travels from dendrite to the cell body. |
| 9. | The chemicals start a similar electrical impulse in the dendrite of the next neuron. |
| 10. | At the end of the axon, the electrical impulse sets off the release of some chemicals. |
