What is required for excitation-contraction coupling?

The binding of a myosin head to an actin molecule is termed a:

The small, fluid-filled cavity occupied by an osteocyte is called a(n):

Which of the following is not a function of the skeleton?

Which dietary requirement for bone health can be made in response to skin exposure to UV light? 

In metabolism we can distinguish two main types of reaction. They receive a name depending if they are for building or for degradation. Write the name we use in biology to specify each kind of reactions that  are for building and write a brief explanation of them (What is it? And what is the main purpose ? Please use different set of words than in the question. Do not use the word “building”

From the same graphic and using one or two sentences could you please explain what is happening in the phase labeled b?

Most bacteria reproduce by

Which of the graphs in next figure best illustrates the activity of an enzyme that is saturated with substrate?

The biosafety level (BSL) for a clinical microbiology laboratory working with potentially airborne pathogens, such as tuberculosis bacteria, is _____