If Ca+2 were to gain 2 electrons, it would become Ca0 and become neutral.
Answer the following statement true (T) or false (F)
True
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Which form of endoplasmic reticulum modifies and packages newly synthesized proteins?
A) smooth endoplasmic reticulum B) rough endoplasmic reticulum
For relaxation to occur,
A. calcium leaves the sarcoplasmic reticulum, and troponin binds calcium and blocks the binding sites on actin. B. calcium enters the myofibril, it detaches from myosin, and the binding sites on myosin become inactive. C. sarcoplasm calcium levels fall, calcium is removed from troponin, and tropomyosin blocks binding sites on actin. D. extracellular calcium levels fall, calcium is pumped into the myofibril, and tropomyosin slides away from actin.
A thickened area of scar tissue that is covered by a shiny, smooth epidermal surface is called a(n)
A) granulation tissue. B) scab. C) keloid. D) callus. E) abrasion.
Receptors that respond to norepinephrine may be beta-__________.
Fill in the blank(s) with the appropriate word(s).