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Medical Science Mcqs 5254 MCQs [All-Courses]

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Medical Science is the study of human health, diseases, prevention, and treatment, focusing on diagnosis, patient care, and medical research to improve healthcare outcomes.

All Topics  5254

Skeletal muscles______________?
A Contracts when calcium is taken up by sarcoplasmic reticulum
B Contracts when actin and myosin filaments shorten
C Contraction is initiated by calcium binding to troponin
D Contraction is initiated by calcium binding to tropomyosin
Correct Answer: Contraction is initiated by calcium binding to troponin
The contractile element in a skeletal muscle is present in______________?
A Sarcolemma
B Sarcoplasm
C Myofibril
D Endomysium
Correct Answer: Myofibril
Which is caused by acetylcholine through nicotinic receptors_____________?
A Contraction of skeletal muscle
B Decrease of heart rate
C Secretion of saliva
D Contraction of pupils
Correct Answer: Contraction of skeletal muscle
Which one of the following is a regulatory protein of the muscle ?
A Troponin
B Myosin
C Actin
D Protein- C
Correct Answer: Troponin
Skeletal muscles_____________?
A Contracts when calcium is taken up by sarcoplasmic reticulum
B Contracts when actin and myosin filaments shorten
C Contraction is initiated by calcium binding to troponin
D Contraction is initiated by calcium binding to tropomyosin
Correct Answer: Contraction is initiated by calcium binding to troponin
Cardiac muscle contracts due to______________?
A Extracellular Ca+2
B Sarcoplasmic ca+2
C Extracellular Na+
D Intracellular Na+
Correct Answer: Extracellular Ca+2
Which hormone does not have corresponding release hormone produced in pituitary ?
A TSH
B Prolactin
C ACTH
D FSH
Correct Answer: Prolactin
Thyroxine causes all the following except______________?
A Decreased cell metabolism
B Increased oxygen consumption
C Increased pulmonary ventilation
D Increased basal metabolism
Correct Answer: Decreased cell metabolism
Which of the following hormones increase the sensitivity of heart to epinephrine________________?
A Parathyroid
B Insulin
C Thyroid
D Glucagon
Correct Answer: Thyroid
Which of the following is called hunger hormone______________?
A Epinephrine
B Glucagon
C Pituitary
D Thyroxine
Correct Answer: Glucagon
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