IMSPQ P1 - Muscle Physiology Quiz

IMSPQ P1 - Muscle Physiology Quiz

University

20 Qs

quiz-placeholder

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IMSPQ P1 - Muscle Physiology Quiz

IMSPQ P1 - Muscle Physiology Quiz

Assessment

Quiz

Health Sciences

University

Hard

Created by

Pandji Nurikhwan

Used 2+ times

FREE Resource

20 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Each Myofibril in a muscle fiber is surrounded by …

Epimysium

Perimysium

Endomysium

Sarcoplasmic Reticulum

Sarcolemma

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The thin filament is formed by aggregation of …-protein into a …-protein

Globular-protein into a filamentous-protein

Globular-protein into a fibrous-protein

Myosin-protein into a contractile-protein

Tropomyosin-protein into a regulatory-protein

Troponin-protein into a complex-protein

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which characteristic or component is shared by skeletal muscle and smooth muscle?

Thick and thin filaments

Troponin

Elevation of extracellular [Ca2+] for excitation-contraction coupling

Spontaneous depolarization of the membrane potential

High degree of electrical coupling between cells

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Repeated stimulation of a skeletal muscle fiber causes a sustained contraction (tetanus). Accumulation of which solute in intracellular fluid is responsible for the tetanus?

Na+

K+

Cl-

Mg2+

Ca2+

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In skeletal muscle, which of the following events occurs before depolarization of the T tubules in the mechanism of excitation-contraction coupling?

Depolarization of the sarcolemmal membrane

Opening of Ca2+ release channels on the sarcoplasmic reticulum (SR)

Uptake of Ca2+ into the SR by Ca2+ - ATPase

Binding of Ca2+ to troponin C

Binding of actin and myosin

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following causes rigor in skeletal muscle?

Lack of action potentials in motoneurons

An increase in intracellular Ca2+ level

A decrease in intracellular Ca2+ level

An increase in ATP level

A decrease in ATP level

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Smooth muscle has T tubule. Does it true?

True, but only in specialized smooth muscle cells

False, smooth muscle lacks T tubules but has caveolae instead

Partially true, smooth muscle has structures functionally similar to T tubules

True, smooth muscle contains modified T tubules for calcium signaling

False, smooth muscle relies on caveolae for calcium influx instead of T tubules

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