What effect does thyroid hormone have on the body's metabolic rate?
a) it has no effect
b) it increases it
c) it decreases it
Answer: b) it increases it
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Which of the these blood vessels is not a visceral branch of the thoracic aorta?
A) intercostal arteries B) pericardial arteries C) bronchial arteries D) esophageal arteries E) mediastinal arteries
During a muscle action potential, calcium is released into the sarcoplasm, near the actin and myosin molecules. Which of the following is the best explanation of what the calcium does?
A) The calcium binds to the actin and myosin and makes them work together. B) The calcium breaks apart ATP to ADP and P. C) The calcium removes the tropomyosin block. D) The calcium causes the release of acetylcholine.
Explain how rubbing your eyes with dirty hands can lead to an infection in the nasal cavity
What will be an ideal response?
Autonomic reflexes
A. are an example of positive feedback. B. are harmful. C. are integrated somewhere in the CNS. D. have efferent input and afferent output. E. are impossible.