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______ is released from the thyroid gland in situations of ______ calcium, which stimulates ________ to lay down more bone.

What is the functional unit of the muscle?

Which statement correctly describes a humoral stimulus?

Flat feet are due to the expression of recessive genes. What is the probability that a child will have flat feet if the mother has flat feet and the father has feet with normal arches (homozygous alleles)?

Actin filaments, intermediate filaments, and microtubules are protein structures involved in what component of the cytoplasm?

What is the main function of a ligand?

Which of the following processes would be mediated by phagocytosis?

Which filament is known to serve as a track for vesicle and cell movement?

What is true of type I muscle fibers?

Using the DNA template strand of A-T-G-C-A-C, what is the corresponding mRNA codon?