Ques:Q: Blood calcium levels are tightly regulated by the what system? Read this paragraph and choose the correct option from the provided answers: Of course, calcium is critical for many other biological processes. It is a second messenger in many signaling pathways, and is essential for muscle contraction, nerve impulse transmission, and blood clotting. Given these roles, it is not surprising that blood calcium levels are tightly regulated by the endocrine system. The organs involved in the regulation are the parathyroid glands. Choices: - digestive - cardiovascular - nervous - endocrine A:

Ans:endocrine
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Ques:Q: What is the vector sum of all the torques acting on the object called? Read this paragraph and choose the correct option from the provided answers: The net torque is the vector sum of all the torques acting on the object. When adding torques it is necessary to subtract CW from CCW torques. Choices: - critical torque - total torque - gross torque - net torque A:

Ans:net torque
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Ques:Q: Which human body system system moves nutrients and other substances throughout the body? Read this paragraph and choose the correct option from the provided answers: The cardiovascular system moves nutrients and other substances throughout the body. Choices: - Digestive system - Muscular system - Integumentary system - cardiovascular system A:

Ans:cardiovascular system
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Ques:Q: What is contained in the skin of brightly colored poison dart frogs? Read this paragraph and choose the correct option from the provided answers: Adrian Pingstone (Wikimedia: Arpingstone). Brightly colored poison dart frogs have toxins in their skin . Public Domain. Choices: - spores - acid - poison - toxins A:

Ans:
toxins
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