Question

test yourself a. multiple choice. encircle the letter that corresponds to the correct answer. 1. insects have small air tubes that facilitate the exchange of air into its body called a. alveoli b. bronchi c. spiracles d. trachea 2. the —— circuit carries blood to and from the tissues. a. arterial b. coronary c. pulmonary d. systemic 3. which of the following statements is correct? a. arteries carry oxygen - poor blood and veins carry oxygen - rich blood. b. all arteries carry oxygen - rich blood and veins carry oxygen - poor blood. c. arteries carry blood away from the heart and veins carry blood to the heart. d. arteries carry blood to the heart and veins carry blood away from the heart. 4. an increase in lymphocytes may mean a problem associated with a. clotting b. immunity c. pulmonary circulation d. systemic circulation 5. which of the following has an incorrect association? a. red blood cells - clotting b. blood platelets - hemoglobin c. white blood cells - antibodies d. plasma - water, nutrients, and wastes 6. which of the following is not a physical barrier for immunity? a. saliva in the mouth b. hair cells in the ears c. acidic ph in the stomach d. oil gland secretions on the skin chapter 2 lifes transport, exchange, and defense systems

Explanation:

1. Insects have spiracles which are small air tubes for air - exchange.
2. The systemic circuit carries blood to and from the tissues.
3. Arteries carry blood away from the heart and veins carry blood to the heart.
4. Lymphocytes are related to immunity, so an increase may mean an immunity problem.
5. White blood cells produce antibodies.
6. Hair cells in the ears are for hearing, not a physical barrier for immunity.

Answer:

1. c. spiracles
2. d. systemic
3. c. Arteries carry blood away from the heart and veins carry blood to the heart.
4. b. immunity
5. c. White blood cells - antibodies
6. b. hair cells in the ears