WorksheetsMuscular System
Total questions: 10
Worksheet time: 5mins
The main function of the sarcoplasmic reticulum is to:
Store sodium ions
Store potassium ions
Store calcium ions
Store phosphate ions
The calcium being released from the sarcoplasmic reticulum binds to:
Troponin I
Troponin T
Troponin C
Troponin G
The main pathology behind Myasthenia Gravis is:
Antibodies binding to the ACh receptors in the presynaptic terminal
Antibodies binding to the voltage gated calcium channels in the presynaptic terminal
Antibodies binding to the ACh receptors in the postsynaptic terminal
Antibodies binding to the Na/K+ pump
What is the main clinical correlation for Lamber-Eaton Syndrome
Ptosis
Dyspnea
Thymoma
Small cell lung cancer
All of the following are possible ways of naming muscles, EXCEPT:
Directions of the muscle fiber
Size of the muscle
Location of the muscle's origin and insertion
Type of striations
Which of the following muscle movements in congruent with movement of a limb away from the midline?
Adduction
Sumation
Abduction
Hyperflexion
An isotonic contraction can be defined as:
Muscular contraction in which the muscle length shortens
Muscular contraction in which the muscle length lengthens
Muscle length changes
Muscle length does not change
Which of the following methods for generating energy for muscular contraction produces the biggest amount of energy?
Anaerobic glycolysis
Aerobic respiration
Direct phosphorylation of ADP by creatinine phosphate
Krebs Cycle
Electron transport chain
The accurate function of tropomyosin is to:
Block the actin binding site on the thick myofilament
Bind calcium released by the sarcoplasmic reticulum
Block the myosin binding site on the thin myofilament
Promote the interaction of actin and myosin
At the level of the sarcomere, all of the following occur during muscular contraction, EXCEPT
Shortening of the muscle fiber
H zone disappears
A band moves closer
H zone widens
