The ____________________ cells, or cells of Leydig, produce testosterone
Fill in the blank(s) with correct word
interstitial
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An important structure for blood pressure regulation is the
A) collecting duct. B) nephron loop. C) papillary duct. D) proximal convoluted tubule. E) juxtaglomerular complex.
The __________ __________ is a muscle that attaches to the scapula, wraps around the ribs to the front, and is visible as triangular points on the anterior chest of well-muscled individuals.
Fill in the blank(s) with the appropriate word(s).
What separates the oral cavity from the nasal cavity?
A) labial frenulum and lingual frenulum B) periodontal ligament C) hard palate and soft palate D) extrinsic and intrinsic muscles
If an element is composed of atoms with an atomic number of 6 and a mass number of 14, then the nucleus of a neutral atom of this element contains
A) 6 protons. B) 8 electrons. C) 8 neutrons. D) 6 protons and 8 electrons. E) 6 protons and 8 neutrons.