27. Amino acids tend to diffuse from a blood capillary to the adjacent cell because
(1) this is the only direction they can move
(2) the brain directs the movement into cells
(3) the cell needs the amino acids to make
protein
(4) the concentration of amino acids is lower
in the cell

Do the following statements describe actin, myosin, both of the proteins or neither of the proteins? (a) contains a binding site for calcium (b) found in the i band (c) exists in a globular (g) form and a filamentous (f) form (d) contains a binding site for atp (e) is a component of the thin filament (f) is a component of the thick filament

When an object is moving away from you while still making a sound, the pitch of the sound is perceived to a. lower b. unchanged c. fluctuating d. higher

What are the four stages of cell signaling?