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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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

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