Which are the visible tonsils located at the back of the mouth?

Identify the major structures of the respiratory system.

Which is a characteristic of nonspecific or innate immunity?

What is the correct movement of lymph through the lymph nodes?

What is not a characteristic of humoral immunity?

What provides the large surface area for gas exchange?

What part of the respiratory system is known as the voice box and consist of the vocal cords?

Which is not an example of the second line of immune defense?

What are the specialized lymph capillaries of the intestines?

Note: same information for questions 4-12, except where otherwise noted. The world is composed of two countries, Country A and Country B. They use labor to produce two goods, TV Series and Movies. All of the assumptions of the Ricardian Model hold. The following table shows the unit labor inputs used to make each good in each country, where one unit is one year of labor. (Thus, for example, to make a TV series in Country A it takes 30 workers working a full year, or one worker working 30 years, and so on.) Country A has 12,000 units of labor and country B has 8,000 units of labor. The two countries are engaged in free and costless trade. Country A Country B TV Series 30 10 Movies 20 5   Note: the following figure is used in questions 7-9. The figure shows the Relative Supply curve of the two countries in international trade. Notation: PTV (PM) is the price of TV series (movies). QATV is the quantity of TV series made in Country A, and analogously for all other quantities. Enter the number Z, or enter 0 if not enough information is provided. Only exact answer is accepted. Use a decimal point if needed.