Anatomy Questions

Prevents excessive ankle inversionCommonly injured in sports injuries (inversion injury)

Which of these is not a suprahyoid muscle?A) GenioglossusB) GeniohyoidC) StylohyoidD) MylohyoidE) Digastric

The resting membrane potential (RMP) for a skeletal muscle cell isA) - 90 mvB) - 30 mvC) 1.5 mvD) 12 mv

Muscles fibers are arranged in bundles called:A) compartmentsB) fasciclesC) retinaculaD) aponeurosesE) groups

Which of the following muscles does not contribute to the rotor cuff?A) Teres minorB) Teres majorC) SubscapularisD) InfraspinatusE) Supraspinatus

Rigor Mortis begins because:A) The sarcoplasmic reticulum degenerates and Ca+2 is releasedB) The sarcoplasmic reticulum degenerates and ATP is releasedC) The Na+ channels in the sarcolemma degenerate and Na+ flows into the cellD) The synaptic knob degenerates and releases acetylcholine

The ability of the muscle cell to return to its initial length after being stretched is called________.A) excitabilityB) conductivityC) extensibilityD) elasticity

The ability of the muscle cell to stretch under tension is known asA) excitabilityB) conductivityC) extensibilityD) elasticity

The elasticity of skeletal muscle fibers is primarily due to the presence of this protein.A) titinB) globular actinC) troponinD) collagenE) tropomyosin

The functional unit of a muscle fiber is the _________, a segment from one Z disc to the next.A) MyofibrilB) I bandC) SarcomereD) Neuromuscular junction E) Striation

You are looking at muscle tissue through a microscope. You see striations, central nuclei andintercalated discs. This type of muscle tissue must be:A) skeletalB) smoothC) cardiacD) impossible to tell from the description

The time lapse between the beginning of stimulus and the beginning of a twitch is called theA) refractory periodB) contraction phaseC) relaxation phaseD) latent period

This chemical carries the stimulating message across the neuromuscular junctionA) synapseB) myosinC) potassiumD) acetylcholine

Which of the following is a regulatory protein of muscle.A) actinB) myosinC) tropomyosinD) titin

Fusiform cells are found in which muscle type.A) skeleton musclesB) cardiac musclesC) smooth muscles

All of the following are structural components of the neuromuscular junction exceptA) synaptic knobB) junctional foldC) basal laminaD) T -TublesE) acetylecholine receptors

Thick filaments consist mainly of the protein ______.

Which of the following muscles is a flexor of the neck.A) splenius capitisB) trapeziusC) sternocleidomastoidD) semispinalis capitis

Before a skeletal muscle fiber can contract, Ca2+ must bind toA) calsequestrinB) calmodulinC) the myosin head.D) troponin.E) actin.

The thenar group of muscles can be found inA) the footB) the radial side of the forearmC) the deep buttockD) the base of the thumb