Assertion` :-` Trachea is lined by ciliated epithelium.
Reason `:-` The co-ordinated movements of cilia in the trachea help in removing dust particles and some of the foreign substances inhaled alongwith atmospheric air.

Fill in the blanks: (a). The coordinated movement of l in the ..2... helps us removing dust particle and some of the foreign substance inhaled along with the atmospheric air (b) Locomotion requires a perfect coordinated activityof ….3…,skeletal and ...4...systems.

Assertion : Ciliated epithelium is present in the inner lining of trachea and large bronchi. Reason : Ciliary movement propel the mucus and foreign particle toward the larynx.

Assertion : Ciliated cpithelium is present in the inner lining of trachea andleage bronchi. Reason : Ciliary movement propel the mucus and foreign particle toward the laynx.

Read the following statements regarding the ciliated epithelium . I. Found only in the lining of the trachea . II cilia are found on the free surface of the cells. III Help in moving particles or mucus in a particular direction over the epithelium. IV Microvilli are found at the free end to increase the surface area of the organ. identify the ones that are correct .

Read the following statements regarding the ciliated epithelium . I. Found only in the lining of the trachea . II cilia are found on the free surface of the cells. III Help in moving particles or mucus in a particular direction over the epithelium. IV Microvilli are found at the free end to increase the surface area of the organ. identify the ones that are correct .

Assertion : An electrostatic precipitator (ESP) is a particulate collection device that removes dust and smoke particles from flowing air using the force of an induced electrostatic charge. Reason : An ESP is a highly efficient device as it removes 99 percent of particulate matter present in the exhaust from a thermal power plant.

Assertion : An electrostatic precipitator (ESP) is a particulate collection device that removes dust and smoke particles from flowing air using the force of an induced electrostatic charge. Reason : An ESP is a highly efficient device as it removes 99 percent of particulate matter present in the exhaust from a thermal power plant.

Which of the following statements about the human respiratory system are INCORRECT ? I. During swallowing , glottis can covered by a thin elastic cartilaginous flap called epiglottis to prevent the entry of food into the larynx. II. The trachea is a straight tube extending up to the mid- thoracic cavity, which divides at the level of the fourth thoracic vertebra into a right and left primary bronchi. III. The trachea , primary secondary and tertiary bronchi, and initial bronchioles are supported by incomplete cartilaginous rings made up of hyaline cartilage. IV. The respiratory part transports the atmospheric air to the alveoli, clear it from foreign particles, humidifies and also brings the air to body temperature.