Biology - Comprehensive Mock Test 31

Question 301 Medium

Bulk of carbon dioxide (CO2) released from body tissues into the blood is present as ?

A) 70% carbaminohemoglobin and 30% as bicarbonate B) Carbaminohemoglobin in RBCs C) Bicarbonate in blood plasma and RBCs D) Free CO2 in blood plasma

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Question 302 Medium

What protects the moist membranes of the respiratory tract?

A) Mucus and cilia B) A 'c' shaped cartilage rings C) A pebbly epidermal surface D) An acidic glands

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Question 303 Medium

The amount of air a person takes in during normal, restful breathing is called the ______

A) Dead space B) Tidal volume C) Vital capacity D) Ventilation rate

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Question 304 Medium

Amount of air in the lungs that remains after deep breathing is called ______

A) Dead space B) Residual volume C) Vital capacity D) Ventilation rate

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Question 305 Easy

Asthma is due to ?

A) Elasticity of lungs is reduced B) Degradation of alveolar wall C) Bronchioles constrict due to muscle spasms D) Damage in diaphragm

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Question 306 Medium

Emphysema, a chronic disorder is high in cigarette smokers. In such cases the ______ of the person is/are found damaged?

A) Plasma membrane B) Alveolar walls C) Bronchioles D) Respiratory muscles

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Question 307 Medium

Which one of the following statements is incorrect regarding the pharynx?

A) Organ of the upper respiratory tract B) Connects to the larynx C) Contributes to the production of speech D) Composed of smooth muscle

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Question 308 Medium

What is the instrument that measures the amount of air inhaled and exhaled with each breath?

A) Sphygmomanometer B) Hygrometer C) Stethoscope D) Spirometer

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Question 309 Medium

Bronchi branch into the tubes of smaller diameters (less than 1 mm) known as ______?

A) Microtrachea B) Bronchioles C) Alveoli D) Eustachian tube

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Question 310 Easy

Respiratory center is located in the ________

A) Pneumotaxic center B) Medulla oblongata C) Alveoli D) Apneustic center

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