Functions of epithelia include all of the following except
A) providing physical protection.
B) controlling permeability.
C) absorption.
D) producing specialized secretions.
E) supporting muscle cells.
Answer: E
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The parasympathetic system differs from the sympathetic system by:
A. exiting the CNS at spinal cord levels B. having a two-neuron motor pathway C. having preganglionic cell bodies located in the CNS D. having short postganglionic axons
What enzyme breaks down acetylcholine into acetic acid and choline to prevent continued contraction of the muscle fiber?
A) potassium ions B) cross bridges C) calcium ions D) sarcoplasmic reticulum E) acetylcholinesterase
Sergio needs to reach the bowls on the top shelf, which are slightly out of reach. Which type of movement below would give him the greatest chance of success in reaching the bowls?
A. dorsiflexion B. plantar flexion C. inversion D. eversion E. circumduction
What structural feature of the brain regulates the movement of materials from the blood into the brain?
A. myelin sheath B. Circle of Willis C. meninges D. blood-brain barrier