The correct answer is:
Option 2: Epiglottis
The epiglottis is a flap of cartilage located at the base of the tongue that covers the opening of the windpipe (trachea) during swallowing. Its role is to prevent food and liquids from entering the trachea and the lungs. When the epiglottis does not function properly (e.g., it fails to close the trachea correctly during swallowing), food or liquid may accidentally enter the airway, causing a person to cough.
If food or liquid enters the trachea (windpipe) instead of the esophagus, it triggers the body's cough reflex to clear the airway, leading to coughing.
Thus, improper movement of the epiglottis would cause coughing during swallowing.
When a person coughs while swallowing food, it indicates that the food has entered the trachea (windpipe) instead of the esophagus (food pipe). This is typically caused by a failure of the Epiglottis to properly cover the trachea during swallowing.
Here's why:
Therefore, the correct answer is Epiglottis.
List I | List II | ||
A. | Oxidative decarboxylation | I. | Citrate synthase |
B. | Glycolysis | II. | Pyruvate dehydrogenase |
C. | Oxidative phosphorylation | III. | Electron transport system |
D. | Tricarboxylic acid cycle | IV. | EMP pathway |
A block of certain mass is placed on a rough floor. The coefficients of static and kinetic friction between the block and the floor are 0.4 and 0.25 respectively. A constant horizontal force \( F = 20 \, \text{N} \) acts on it so that the velocity of the block varies with time according to the following graph. The mass of the block is nearly (Take \( g = 10 \, \text{m/s}^2 \)):
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The circuit shown in the figure contains two ideal diodes \( D_1 \) and \( D_2 \). If a cell of emf 3V and negligible internal resistance is connected as shown, then the current through \( 70 \, \Omega \) resistance (in amperes) is: