How does aging affect the endocrine system?
A. Secretory activity of endocrine glands decreases.
B. Normal levels of hormones, particularly growth hormone and sex hormones, often decrease.
C. Aging reduces the efficiency of endocrine system functions.
D. Endocrine system imbalances can lead to weight gain or muscle loss.
E. All of the choices are correct.
E
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Skeletal muscle fibers are formed from embryonic cells called
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If you wanted to view a structure at the largest total magnification possible on your compound light microscope (1000× TM), which objective lens would you choose?
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