Many growth factors use ________ as a second messenger.
A. cyclic GMP
B. calmodulin
C. tyrosine kinase
D. cyclic AMP
Answer: C
Anatomy & Physiology
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Leukemia is usually due to bone marrow cancer, and it creates a higher number of ________ than normal.
A. WBCs B. platelets C. RBCs D. thrombocytes
Anatomy & Physiology
The process of gas exchange between air and blood is called ________
A) External respiration B) Ventilation C) Internal respiration D) Respiration
Anatomy & Physiology
Passive transport refers to a process that requires
A) no pressure gradient. B) no energy at all. C) no electrical gradient. D) no concentration gradient. E) no cellular energy.
Anatomy & Physiology
The adrenal cortex produces only
A) polypeptides B) steroids C) amines D) glycoproteins
Anatomy & Physiology