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.
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