Which organ is NOT part of the cardiovascular system and plays an important role in regulating blood pressure?
A) kidney
B) spleen
C) liver
D) lung
E) skin
A) kidney
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Since each myofibril is attached at either end of the muscle fiber, when sarcomeres shorten, the muscle fiber
A) lengthens. B) shortens. C) strengthens. D) weakens. E) pulls from the middle.
When exposed to ultraviolet light, keratinocytes convert a steroid precursor into ________, a molecule that is crucial for regulation of calcium levels.
A. phosphorus B. calcitonin C. creatine D. calcitriol E. cholecalciferol
Which of the following hormones is synthesized by the hypothalamus?
A. ADH (antidiuretic hormone) B. MSH (melanocyte stimulating hormone) C. TSH (thyroid stimulating hormone) D. ACTH (adrenocorticotropic hormone) E. T3 and T4
Which of the following skeletal parts are most affected by osteopenia?