____________ and ____________ are chemicals released from first-order neurons in the hypothalamus; the first one mentioned enhances appetite and the second one suppresses appetite
Fill in the blank(s) with correct word
Neuropeptide Y, melanocortin
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Which of the following muscles acts to decrease thoracic volume during forced exhalation?
A) internal intercostal muscles B) pectoralis minor C) serratus posterior D) diaphragm
A toughened layer of connective tissue that encircles and stabilizes a bone at a fracture site is called a(n) ________.
Fill in the blank(s) with the appropriate word(s).
Sulfur dioxide is classified as..
A) an inhalant. B) a heavy metal. C) a carcinogen. D) a particulate.
Which best describes a "myofibril"?
A. It is a single skeletal-muscle cell. B. It is a cylindrical cellular organelle composed of myofilaments. C. It is a hollow membranous structure that stores calcium. D. It is composed of a single type of protein and forms cross-bridges. E. It is a fibrous junction between a muscle cell and a tendon.