When muscles underlying the skin contract, the intervening ________ tissue stretches so that the muscles can move independently, without pulling against the skin.
Fill in the blank(s) with the appropriate word(s).
areolar
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The trachea extends from the larynx to the ________ vertebra.
A. second cervical B. first thoracic C. fifth thoracic D. fourth lumbar
The basal nuclei
A) initiate voluntary muscle activity. B) provide the general pattern and rhythm for movements such as walking. C) coordinate sensory information. D) control the secretions of the pituitary gland. E) control respiration and blood pressure.
The mass number represents the number of
A) protons in an atom. B) electrons in an ion. C) neutrons in an atom. D) protons and neutrons in an atom. E) neutrons and electrons in an atom.
Hydrogen bonding between water molecules is responsible for ________
A) polarity B) denaturation of proteins C) enzyme structure D) nonpolar covalent bonding E) surface tension