Exam 8: Muscle Physiology

Indicate which of the muscle proteins in skeletal muscle is associated with the item in question by writing the appropriate letters in the blanks using the answer code below: a.actin only b.myosin only c.actin and myosin d.troponin-tropomyosin complex e.actin, troponin, and tropomyosin f.actin, myosin, troponin, and tropomyosin -Can bind with Ca²⁺ during contraction

Indicate which bands are being described in each statement by writing the appropriate letter in the blank using the answer code below: a.A band b.I band c.H zone d.I band and H zone -Remains the same size during muscle contraction

Indicate which type of muscle is associated with the property in question by writing the appropriate letter in the blank using the answer code below: a.skeletal muscle only b.single-unit smooth muscle only c.cardiac muscle only d.skeletal muscle and cardiac muscle e.skeletal muscle and single-unit smooth muscle f.single-unit smooth muscle and cardiac muscle g.skeletal, single-unit smooth, and cardiac muscles -Has a clear-cut length-tension relationship

The stretch receptors in the central portion of the muscle spindle can be activated by

Match the sarcomere component with the correct characteristic. a.Z line b.A band c.I band d.H zone -Runs down the middle of the I band

Phasic smooth muscle is abundant in the walls of hollow organs of the digestive system and contract in bursts of contractile activity.

Indicate which of the characteristics in question apply to each of the muscle fiber types by using the following answer code: a.Slow-oxidative fiber b.Fast-oxidative fiber c.Fast-glycolytic fiber d.Slow-oxidative fiber and fast-oxidative fiber e.Fast-oxidative fiber and fast-glycolytic fiber f.Slow-oxidative fiber, fast-oxidative fiber and fast-glycolytic fiber -Produces the most lactic acid

Which of the following statements about the different types of muscle fibers is incorrect?

Indicate which type of muscle is associated with the property in question by writing the appropriate letter in the blank using the answer code below: a.skeletal muscle only b.single-unit smooth muscle only c.cardiac muscle only d.skeletal muscle and cardiac muscle e.skeletal muscle and single-unit smooth muscle f.single-unit smooth muscle and cardiac muscle g.skeletal, single-unit smooth, and cardiac muscles -Is self-excitable

Foot proteins link the actin molecules together within a thin filament.

Match muscle term with the correct characteristic. a.a storage form of glucose used in muscle cells requiring rapid energy release b.a molecule that can quickly provide materials to make ATP c.an oxygen-storing protein that makes muscle tissue appear red d.a fuel molecule for cell respiration or fermentation e.a fermentation product when our cells become anaerobic -Myoglobin

In an isotonic contraction, about 50 percent of the energy consumed is realized as external work and the remaining 50 percent is converted to heat.

Match the sarcomere component with the correct characteristic. a.Z line b.A band c.I band d.H zone -Contains only thick filaments

Tropomyosin covers the cross bridge binding sites on the thick filaments when a sarcomere is not contracting.

Indicate the characteristics of the muscle-tension receptors using the following answer code: a.muscle spindle b.Golgi tendon organ c.both of these receptors -Monitors change in muscle length

The three types of muscle tissue are ____________________, ____________________, and ____________________.

With the type of lever system exemplified by flexion of the elbow joint, when an object is held in the hand, the

Calcium turns on cross bridges by physically repositioning the troponin-tropomyosin complex to uncover the actin cross-bridge binding sites in

Indicate which type of muscle is associated with the property in question by writing the appropriate letter in the blank using the answer code below: a.skeletal muscle only b.single-unit smooth muscle only c.cardiac muscle only d.skeletal muscle and cardiac muscle e.skeletal muscle and single-unit smooth muscle f.single-unit smooth muscle and cardiac muscle g.skeletal, single-unit smooth, and cardiac muscles -Is striated

Indicate the characteristics of the muscle-tension receptors using the following answer code: a.muscle spindle b.Golgi tendon organ c.both of these receptors -Provides information to motor regions of the brain