The most common extracellular cation is ________.
Fill in the blank(s) with the appropriate word(s).
Na+
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What is the primary function of tumor suppressor genes?
What will be an ideal response?
The amount of fat stored inside skeletal muscle fibers is ________ by endurance training.
A. unchanged B. decreased C. increased
What is a triad?
A. After exercise, the O2 taken in that exceeds the O2 required for resting metabolism B. A T tubule and two adjacent terminal cisternae C. The combination of myosin heads with active sites on actin molecules D. A protein found along the groove of the F-actin double helix E. The movement of myosin head while attached to actin myofilament
When do the testes start secreting testosterone?
A) In the first three years of adolescence B) In the first trimester after birth C) In the first trimester of fetal development D) After the first ejaculation E) In the first three years after birth