Dot _________________________________

Which of the following statements about tying the extension ladder halyard is MOST accurate?

A. The halyard should be tied using a figure-eight on a bight. B. The halyard should be tied to prevent the fly from slipping. C. The halyard should be tied before resting the ladder against the structure. D. The halyard should be tied differently for closed- and for open-ended halyards.

Which of the following is the functional unit of a muscle fiber?

a. Alveoli b. Sarcomere c. Myosin d. Actin