What is the role of calcium ions in muscle contraction?
A) form hydroxyapatite crystals
B) reestablish glycogen stores
C) bind to regulatory sites on troponin to remove contraction inhibition
D) increase levels of myoglobin
C) bind to regulatory sites on troponin to remove contraction inhibition
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The most common extracellular cation is ________.
Fill in the blank with correct word.
Which type of gland releases products by secretion into the blood?
A. Endocrine B. Merocrine C. Holocrine D. Exocrine E. Apocrine
A subthreshold stimulus
A) produces an afterpotential. B) produces a graded (local) potential. C) causes an all-or-none response. D) produces more action potentials than a submaximal stimulus.
Sex-linked traits are
A. only found in females. B. inherited from one of the sex chromosomes. C. inherited from the X chromosome only. D. only found in males. E. inherited from the Y chromosome only,