Question 1
Which of the following is NOT found in an arteriole?
◦ elastic layer
◦ basement membrane
◦ smooth muscle
◦ valve
◦ endothelium
Question 2
Which of the following statements is false?
◦ A heart will stop beating when the nerves to the heart are severed.
◦ Some cardiac muscle cells are self-excitatory.
◦ The pacemaker of the heart is the sinoatrial node.
◦ Cardiac muscles join end to end to allow rapid communication.
◦ Cardiac muscles contract essentially in unison.