You are an endocrinologist. A patient has been referred to you because he is cold all the time, even when the ambient temperature is 75°F. His throat is swollen. He also appears to heal slowly
You immediately suspect that his metabolic rate is slower than normal due to
A) elevated calcitonin levels.
B) elevated growth hormone levels.
C) decreased parathyroid hormone levels.
D) decreased thyroxine levels.
E) elevated insulin levels.
D
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A catalase-negative, non–spore forming, and gram-positive rod that is not acid-fast could possibly belong to which group of bacteria?
a. Corynebacterium b. Bacillus c. Actinomyces d. Erysipelothrix
Cyanide binds and impairs one of the molecules involved in the synthesis of ATP. The target organelle for cyanide must be
A. peroxisomes. B. lysosomes. C. ribosomes. D. the endoplasmic reticulum. E. mitochondria.
A mammalian neuromuscular junction endplate region at rest has the following concentrations of sodium and potassium: [K+]in = 140 mM, [K+]out = 5 mM, [Na+]in = 10 mM, [Na+]out = 145 mM, [Cl-]in = 10 mM, and [Cl-]out = 125 mM
What is the membrane potential of this endplate region (at 37°C)? What will be an ideal response?
Which type of molecule NEVER contains a phosphate group?
A) triglycerides B) phospholipid C) nucleic acid D) ATP