Question 1

MATCHING
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:
-Found in thick filament.

Accepted Answer

Myosin is the primary protein found in the thick filament of skeletal muscle.

Answer: C
 Both actin and myosin are found in the thick filament of skeletal muscle.

Answer: D
 The troponin-tropomyosin complex is associated with actin in skeletal muscle, but it is not found in the thick filament.

Answer: F
 All four proteins (actin, myosin, troponin, and tropomyosin) are present in the thin filament of skeletal muscle.

Question 2

In smooth muscle, Ca²? binds with the protein ____________________, which is structurally similar to troponin.

Accepted Answer

The answer of In smooth muscle, Ca²? binds with the...

Question 3

MATCHING
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:
-Can bind with myosin during muscle contraction.

Accepted Answer

Actin is the protein that binds with myosin during muscle contraction, forming cross-bridges that facilitate the sliding filament mechanism.

Question 4

MATCHING
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:
-Found in the sarcomere.

Accepted Answer

The sarcomere is the basic contractile unit of skeletal muscle and contains actin, myosin, troponin, and tropomyosin.

Question 5

MATCHING
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:
-Spherical.

Accepted Answer

Actin is the only muscle protein in skeletal muscle that is spherical.

Question 6

MATCHING
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:
-Lie(s) near the groove of the thin filament helix.

Accepted Answer

The troponin-tropomyosin complex lies near the groove of the thin filament helix, covering the myosin binding sites on actin.

Question 7

MATCHING
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:
-Regulatory protein(s).

Accepted Answer

The troponin-tropomyosin complex is a regulatory protein that controls the interaction between actin and myosin in skeletal muscle contraction. It is not directly involved in the contraction itself, but rather acts as a switch to turn on and off the interaction between actin and myosin.

Question 8

MATCHING
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:
-Found in the I band.

Accepted Answer

The I band of a sarcomere contains actin filaments, along with the troponin-tropomyosin complex.

Question 9

MATCHING
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:
-Found in the H zone.

Accepted Answer

The H zone is where myosin filaments overlap without actin filaments. Therefore, myosin is the only muscle protein found in the H zone.

Question 10

The source of calcium in smooth muscle is the ____________________.

Accepted Answer

The answer of The source of calcium in smooth muscle...

Question 11

MATCHING
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:
-Posses cross bridges.

Accepted Answer

Myosin is the muscle protein that possesses cross bridges, which are essential for muscle contraction.

Question 12

MATCHING
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:
-Found in thin filament.

Accepted Answer

Thin filaments in skeletal muscle are primarily composed of actin, troponin, and tropomyosin.

Question 13

MATCHING
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:
-Contractile protein(s).

Accepted Answer

Actin and myosin are the two main contractile proteins found in skeletal muscle.

Answer: D 
 The troponin-tropomyosin complex is not a contractile protein, but rather a regulatory protein that controls muscle contraction by blocking or allowing access to the actin binding sites on myosin.

Answer: E 
 Actin, troponin, and tropomyosin are all regulatory proteins involved in controlling muscle contraction, but not directly involved in the contractile process itself.

Answer: F 
 This answer includes all four proteins mentioned (actin, myosin, troponin, and tropomyosin), but specifically includes the regulatory proteins as well as the contractile proteins involved in muscle contraction.

Question 14

MATCHING
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:
-Found in higher concentration is smooth muscle compared to skeletal muscle.

Accepted Answer

Smooth muscle has a higher concentration of actin compared to skeletal muscle, but lacks troponin.

Question 15

Single-unit is alternately called __________ because it is found in the walls of the hollow organs or viscera.

Accepted Answer

The answer of Single-unit is alternately called __________ because it...

Question 16

MATCHING
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:
-Found in the A band.

Accepted Answer

The answer of MATCHING
Indicate which of the muscle proteins in...

Question 17

MATCHING
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:
-Shape consists of two globular heads attached to a tail.

Accepted Answer

This description fits myosin, as it consists of two globular heads attached to a tail.

Question 18

Smooth muscle is grouped into two categories, _____ and _______.

Accepted Answer

The answer of Smooth muscle is grouped into two categories,...

Question 19

MATCHING
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:
-Can bind with Ca²? during contraction.

Accepted Answer

The troponin-tropomyosin complex is responsible for regulating muscle contraction by binding with Ca²? and controlling the interaction between actin and myosin. Actin and myosin themselves do not directly interact with Ca²?. Therefore, options A, B, C, E, and F are incorrect.

Question 20

MATCHING
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:
-Has (have) ATPase capacity.

Accepted Answer

Myosin is the primary ATPase enzyme in skeletal muscle responsible for the hydrolysis of ATP to energize muscle contraction.

Answer: F
 Both actin and myosin have ATPase activity, but in addition, the troponin-tropomyosin complex also has a regulatory role in muscle contraction by controlling access of myosin to actin. Thus, all four proteins (actin, myosin, troponin, and tropomyosin) are involved in ATPase-mediated muscle contraction.

Quiz 8: Muscle Physiology

MATCHING 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: -Found in thick filament.

In smooth muscle, Ca²? binds with the protein ____________________, which is structurally similar to troponin.

MATCHING 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: -Can bind with myosin during muscle contraction.

MATCHING 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: -Found in the sarcomere.

MATCHING 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: -Spherical.

MATCHING 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: -Lie(s) near the groove of the thin filament helix.

MATCHING 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: -Regulatory protein(s) .

MATCHING 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: -Found in the I band.

MATCHING 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: -Found in the H zone.

The source of calcium in smooth muscle is the ____________________.

MATCHING 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: -Posses cross bridges.

MATCHING 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: -Found in thin filament.

MATCHING 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: -Contractile protein(s) .

MATCHING 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: -Found in higher concentration is smooth muscle compared to skeletal muscle.

Single-unit is alternately called __________ because it is found in the walls of the hollow organs or viscera.

MATCHING 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: -Found in the A band.

MATCHING 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: -Shape consists of two globular heads attached to a tail.

Smooth muscle is grouped into two categories, _ and ___.

MATCHING 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: -Can bind with Ca²? during contraction.

MATCHING 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: -Has (have) ATPase capacity.