Quiz

QUIZ

1. What system contributes least to the beating rate of the heart in animals?

a. Respiratory system b. Endocrine system c. Nervous system d. Cardiac system

Answer: a. The heart’s rate is determined partially by the automaticity of the heart inherent in the cells of the heart, as well as by input from the central nervous system (via the autonomic nervous system) and the endocrine system (via hormonal input).

2. Which type of organism is most likely to have an open circulatory system?

a. Mammal b. Arthropod c. Fish d. Bird

Answer: b. An arthropod is a type of animal that has an open circulatory system, in which hemolymph gets circulated into a large cavity rather than a system of vessels.

3. What part of the nervous system in animals will control the fight-or-flight response?

a. Spinal cord b. Cerebrum c. Brainstem d. Autonomic nervous system

Answer: d. The autonomic nervous system is mainly responsible for the animal’s fight-or-flight response.

4. What aspect of the nerve cell is efferent, sending signals from the body of the neuron to other neurons?

a. Dendrites b. Axons c. Soma d. Myelin

Answer: b. It is the axons that send signals out of the nerve cell to other parts of the nervous system. There is usually just one axon per nerve cell.

5. How are oxygen and carbon dioxide exchanged in the lungs?

a. It involves the active transport of oxygen and carbon dioxide across alveolar cells. b. It involves a direct oxygen-carbon dioxide exchange in the alveolar cells. c. Oxygen is actively pumped in but carbon dioxide passively leaves. d. Both oxygen and carbon dioxide passively move across the alveolar cells.

Answer: d. Oxygen and carbon dioxide are passively diffused across the alveolar cells with both gases going from an area of high concentration to an area of low concentration (in opposite directions).

6. Besides lungs, animals have evolved several other systems for respiration.

Which is not a major system used for respiration in animals?

a. GI tract b. Tracheal system c. Gills d. Skin

Answer: a. Each of these are ways that an animal can have gas exchange; however, they generally do not use the GI tract for this purpose.

7. What cell is not associated with the innate immune system?

a. T cell b. Macrophage c. Dendritic cell d. NK cell

Answer: a. The T cell is distinctly connected to the adaptive immune system and not to the innate immune system. The others are cells that are connected to the innate immune system.

8. Which type of cell does not actively participate in the phagocytic process as part of the innate immune system?

a. Dendritic cell b. Mast cell c. NK cell d. Macrophage

Answer: b. The mast cell will participate in the innate immune system but it does not actively engage in phagocytosis. The other cells are phagocytic cells of the innate immune system.

9. What is not a feature of sexual reproduction?

a. It produces genetically unique individuals b. There can be an advantage in unstable environments c. It involves two types of parents d. Large numbers of offspring can be created

Answer: d. A potential disadvantage of sexual reproduction is that large numbers of offspring cannot be created so this is not as successful in some ways when compared to asexual reproduction.

10. Which animal can regenerate a new organism when parts of it have been split in half longitudinally?

a. Coral b. Sea anemones c. Wasps d. Water fleas

Answer: b. Sea anemones and a few other species can reproduce by binary fission, which in animals, involves splitting the organism longitudinally to create two identical offspring.