Videos
Introduction:
The spiracles are the valve-like structures present in the exoskeleton of insects, which can be opened or closed as per the requirement.
Answer to Problem 1TYK
Correct answer:
The spiracles close off the tracheae to minimize the water loss in the insects.
Explanation of Solution
Explanation/Justification for the correct answer:
Option (d) is given that the function of the spiracles in the insects is to close the tracheae to regulate the loss of water from the body. Insects have adopted a different type of respiratory system called the tracheal system. The insects have tracheae (air-filled tubes) located within their bodies. These tubes are connected to the external environment through spiracles. The air moves into the spiracles from the environment. The air then moves inside the insect’s body through the tracheae. The closing of spiracles is controlled by the CNS (central nervous system) as well as the
Explanation for incorrect answers:
Option (a) is given that the spiracles dilate and constrict during flight or other types of movement, functioning as a breathing mechanism in the insects. The spiracles do not dilate and constrict during flight or other movements of the insect only. They dilate and constrict even when the insect relaxes. So, it is a wrong answer.
Option (b) is given that the spiracles open into the body cavity, allowing direct contact between hemolymph and tissues in the insects. The spiracles do not open into the body cavity. These are the openings present on the outer surface. So, it is a wrong answer.
Option (c) is given that in the insects, the spiracles are thin and highly branched, offering a large surface area for the exchange of gases. In the insects, the trachea is highly branched structure and not the spiracles, which provide a large surface area for gas exchange. So, it is a wrong answer.
Hence, options (a), (b), and (c) are incorrect.
Thus, the closing of the spiracles closes the tracheae and it minimizes the water loss from the insect’s body.
Want to see more full solutions like this?
Chapter 42 Solutions
Biological Science, Books a la Carte Plus Mastering Biology with Pearson eText -- Access Card Package (6th Edition)
- What is true about Myoglobin? A. is the oxygen-carrying molecule in most invertebrates who do not have respiratory systems. B. primary purpose is to bind to carbon monoxide to prevent us from being poisoned. C. uses copper rather than iron. D. is similar to hemoglobin but has one heme and found mostly in muscle tissue. Which animal has two atria and one ventricle with no septum? A. fish B. frog C. rat D. lizardarrow_forwardWhat term best describes the exchnage of oxygen and carbon dioxide at the interface between the systemic cappillaries and the peripheral tissues? A. Ventilation B. Cellular respiration C. Internal respiration D. External respirationarrow_forwardSome deep diving mammal compress their lungs to remove air. What is FALSE about this situation? A. Some whales have ribs with joints that help the compression. B. Removing air from lungs prevents lethal nitrogen bubbles (the bends). C. The animals store 02 in their blood and muscles during dives D. The air goes from their lungs into tiny spaces within their bones. Which is biggest? A. hemoglobin B. iron C. hemearrow_forward
- Describe the tracheal system of insects. What is the advantage of such a system for a small animal?arrow_forwardWhere is the actual exchange of oxygen and carbon dioxide take place?* a. Veins b. Artery c. Capillaries 2. What type of blood vessels that contain valves to ensure blood flows in only one direction?* a. Veins b. Capillaries c. Artery What type of blood vessel that carry oxygenated blood away from the heart and also contain a strong, muscular middle layer that helps pump blood through the body? a. Capillaries b. Veins c. Arteryarrow_forwardMatch the respiratory organs of FROGS to their functions. 1. Nasal Cavity A. The short tubes of a frog’s breathing system that leads from the larynx to the lungs; passageway of air into the lungs. 2. Glottis B. Amplify the advertisement call of the male and attract females. 3. Pharynx C. Where gases are exchanged between the air and the bloodstream. 4. Trachea D. Passageway of air from the external environment. 5. Larynx E. Allows air to enter glottis then into the larynx. 6. Vocal Sacs F. Controls airflow in and out of the respiratory passages. 7. Bronchi G. Connects the pharynx with lungs. 8. Lungs H. Contains vocal cords; used to conduct air to the lungs and as a voice box so the frog can communicate. 9. Alveolar Ducts I. Exchange point where CO2 leaves and O2 enters the blood. 10. Alveoli J. Tiny tubes that connect the respiratory bronchioles to alveolar sacs. K. Divides the left and right lung.arrow_forward
- Mammals carry hemoglobin and oxygen in their red blood cells to help the blood circulate in the different parts of their body. State 2 reasons for this adaption.arrow_forwardWhich feature is found in an open circulatory system but never in a closed circulatory system?arrow_forwardIn flatworms, flame cells are involved in what metabolic process?a. reproduction c. locomotionb. digestion d. osmoregulationarrow_forward
- Insects have a tracheal system that consists of: O a. Flat plates along the side of the body. O b. A mass of air filled tubes. Blood vessels running just under the skin. d. O d. Apairof lungs extending Inside the body. Gills on the legs.arrow_forwardName the airways in the mammalian lung. What are their functions? How does air enter and leave the lung?arrow_forward10. How do the heart and the lungs work together? A. The heart transported oxygen to every cell through the help of lungs. B. The heart pumps the blood and the lungs transport the needed oxygen through defecation. C. The heart pumps the blood that transports oxygen to the cell of the body. Carbon dioxide is given off and it is carried by the blood to the lungs and is released through exhalation. D. The heart pumps the blood that carries nutrients and waste to the cell is being carried to the lungs where the capillaries of aivedi distribute the nutrients and the waste to the different parts of our body. 11. Which of the following is NOT a function of the circulatory system? A. Produce celis that aid in fighting infection B. Maintain hodly temperature and pH to stabilize homeostasis C. Forms ciot to stop bleeding aier injury and heals wounds faster D. Circulate's chemical signals calen hormones to target cells and organs. 12. If the circulatory systerm i compared to a courier service,…arrow_forward
Human Anatomy & Physiology (11th Edition)BiologyISBN:9780134580999Author:Elaine N. Marieb, Katja N. HoehnPublisher:PEARSON
Biology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStax
Anatomy & PhysiologyBiologyISBN:9781259398629Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa StouterPublisher:Mcgraw Hill Education,
Molecular Biology of the Cell (Sixth Edition)BiologyISBN:9780815344322Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter WalterPublisher:W. W. Norton & Company
Laboratory Manual For Human Anatomy & PhysiologyBiologyISBN:9781260159363Author:Martin, Terry R., Prentice-craver, CynthiaPublisher:McGraw-Hill Publishing Co.
Inquiry Into Life (16th Edition)BiologyISBN:9781260231700Author:Sylvia S. Mader, Michael WindelspechtPublisher:McGraw Hill Education