muscles Flashcards
(39 cards)
what is the role of the sacroplasmic reticulim(SR in muscle functions
a) to store oxygen for muscle contraction
b) to store calcium ions for muscle contraction
c) to synthesis proteins for muscle growth
d0 to produce ATP for muscle energy
B
what is the function of myofibrils in muscle fibres?
a) to produce energy in the form of ATP
b) to provide structural support to the muscle fibre
c) to store genetic material
d)to facilitate muscle contractions
D
Which muscle retracts the scalp and is innervated by the facial nerve?
A. Occipitalis
B. Frontalis
C. Temporalis
D. Orbicularis Oris
A
2) What is the primary function of the orbicularis oris muscle?
A. Chewing
B. Closing the eye
C. Puckering the lips
D. Raising the eyebrows
C
3) Which muscle encircles the mouth and is responsible for closing and protruding the lips as in kissing?
A. Buccinator
B. Masseter
C. Sternocleidomastoid
D. Orbicularis Oris
D
4) Which muscle tilts the head upward and allows one to look over their shoulder?
A. Sternocleidomastoid
B. Trapezius
C. Deltoid
D. Biceps
A
5) Which muscle is responsible for closing the eye in blinking, squinting, and aiding in the flow of
tears?
A. Orbicularis Oris
B. Orbicularis Oculi
C. Zygomaticus Major
D. Masseter
B
6) Which muscle is responsible for elevating the eyebrows in glancing upward?
A. Orbicularis oculi
B. Frontalis
C. Masseter
D. Zygomaticus major
B
7) What is the function of the zygomaticus major muscle?
A. Frowning
B. Smiling
C. Chewing
D. Raising the eyebrows
B
8) Which facial muscle helps in compressing the cheeks while blowing air out?
A. Risorius
B. Buccinator
C. Masseter
D. Temporalis
B
9) Which muscle pair is responsible for rotating the head to the opposite side?
A. Sternocleidomastoid
B. Scalene muscles
C. Splenius capitis
D. Semispinalis capitis
A
10) Which of the following muscles has fibers running in a horizontal direction?
A. Rectus abdominis
B. External oblique
C. Transversus abdominis
D. Internal oblique
C
11) Which muscle group aids in forced exhalation during coughing?
A. Internal intercostal muscles
B. External intercostal muscles
C. Diaphragm
D. Pectoralis major
A
12) Which muscle of the anterior abdominal wall is also known as the “six-pack” muscle?
A. External oblique
B. Transversus abdominis
C. Internal oblique
D. Rectus abdominis
D
13) Which muscle is responsible for the elevation of the scapula and extension of the neck?
A. Trapezius
B. Sternocleidomastoid
C. Semispinalis capitis
D. Longus colli
A
14) Which muscle is the primary muscle involved in respiration?
A. Pectoralis major
B. Diaphragm
C. Sternocleidomastoid
D. Trapezius
B
15) What is the function of the external intercostal muscles during inhalation?
A. Relax and allow the ribcage to drop
B. Contract and lift the ribcage
C. Contract and compress the abdomen
D. Relax and expand the abdomen
B
2) Where are the nuclei located in muscle fibres?
A. In the mitochondria
B. Inside the myofibrils
C. Pressed against the inside of the sarcolemma
D. In the cytoplasm of the muscle fibre
C
4) Which of the following muscle types opposes the prime mover and limits the speed and range
of motion of a joint?
A. Prime Mover
B. Synergist
C. Antagonist
D. Fixator
C
5) Which of the following proteins functions as a regulatory switch for muscle contraction?
A. Myosin
B. Actin
C. Troponin
D. Tropomyosin
C
6) Which of the following connective tissue components is responsible for wrapping muscle
fibers together in bundles called fascicles?
A. Fascia
B. Epimysium
C. Perimysium
D. Endomysium
C
7) During muscle contraction, which of the following occurs?
A. Actin filaments shorten
B. Myosin filaments shorten
C. Both actin and myosin filaments shorten
D. Neither actin nor myosin filaments shorten
D
8) Which of the following is NOT a function of skeletal muscles?
A. Movement
B. Stability
C. Control of body openings and passages
D. Hormone secretion
E. Heat production
D
9) Which structure provides anchorage for thin filaments and elastic filaments?
A. H band
B. M line
C. I band
D. Z disc
D
