SBI3U Chapter 11.2 The Function of Respiration

Which of the following statements about "The Passage of Air through the Upper Respiratory Track" is INCORRECT.

• Air enters the respiratory system through the nostrils. Air can also enter through the mouth, especially if breathing is rapid, as it is during strenuous exercise.

• Inside the nasal passages very thin bones, called turbinate bones, project into the nasal passages and increase the surface area of these chambers.

• A thin membrane covering the turbinate bones secretes mucus, which moistens the air and traps particles of dust, bacteria, and other foreign matter.

• A dense network of capillaries in the lining of the turbinates supplies warm blood to the nasal passages. This heats the air in the nasal passages to body temperature and protects delicate structures in the lower respiratory tract from damage by cold air

• None of the other 4 are INCORRECT.

At the base of the pharynx, behind the tongue, is the entrance to the __________________. This opening is called the ______________.

• trachea, glottis

• larynx, epiglottis

• nostril, bronchi

When you swallow food, the ______________ covers over the glottis to prevent food from entering the trachea and passing into the lungs.

• epiglottis

• glotis cover

• trachea

• larynx

Which of the following statements about "The Larynx" are INCORRECT.

• It is between the glottis and the trachea and is made of cartilage, which is a tough, firm connective tissue.

• Inside the larynx are the vocal cords which consist of two folds of membrane stretched across and are used for sound production in mammals.

• During normal breathing, muscular tissue holds the vocal cords apart, allowing air to pass freely through the larynx.

• To make sounds, the vocal cords are moved closer together so that pressure from air expelled from the lungs causes the cords to vibrate.

• None of the other 4 are INCORRECT.

The right lung has ___ lobes and the left lung has _____, leaving space for the heart in the thoracic cavity.

• 3,2

• 3,1

• 4,3

• 2,3

If we did not have this the outside surface of our lungs would be damaged by friction as the lungs rub on the inner surface of the ribs.

• pleural membrane

• semicircular loops of cartilage.

• bronchioles

• alveolus

Which of the following statements about the "lower respiratory track" is INCORRECT.

• There is one bronchus that enters each lung.

• Inside the lungs, each bronchus subdivides many times to form a network of microscopic tubules called bronchioles.

• Each bronchiole eventually ends in a grape-like cluster of tiny sacs called alveoli

• Surrounding each alveolus is a network of fine capillaries where gas exchange takes place.

• None of the other 4 are INCORRECT

The ________________ in red blood cells transports oxygen from the lungs to the body’s tissues.

• hemoglobin

• plasma

• salt

• water

What is the organ for human respiration?

• lung
• trachea
• gills
• heart

What is the gas inhaled by human?

• carbon dioxide
• oxygen
• carbon monoxide
• air