Anatomy Questions
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Which is the correct order of the connective tissue layers of a skeletal muscle, beginning with the most superficial?a: Endomysiumb: Epimysiumc: Perimysiuma. abcb. bacc. cabd. bcae. cba
In the male, which muscle ejects urine or semen, compresses the base of the penis, and helps in formation of an erection?A) IliococcygeusB) Superficial transverse perineal muscleC) External urethral sphincterD) Bulbospongiosus E) Pubococcygeus
Which nerve innervates the hamstring muscles (posterior thigh)?
As a baseball pitcher winds up to throw, he medially rotates his arm by contracting his A) supraspinatus. B) subscapularis. C) infraspinatus. D) teres minor.
Crural muscles are those that move the A) vertebral column. B) hip. C) thigh. D) wrist.E) ankle, foot, and toes.
Which muscles help us in the initial breakdown of food?A) Extrinsic eye musclesB) Muscles of masticationC) Muscles that move the tongue D) Muscles of facial expression
The property of muscle tissue that allows an impulse to travel down the entire length of the cell membrane isa. elasticityb. conductivityc. extensibilityd. contractilitye. responsibility
Which of the following is not one of the rotator cuff muscles?A) Teres majorB) Teres minorC) SupraspinatusD) InfraspinatusE) Subscapularis
The function of the biceps femoris is to A) flex the hip and ankle.B) extend the thigh and flex the leg. C) flex the thigh and extend the leg.D) flex the thigh (with no action at the leg).E) adduct the thigh and extend the knee.
The ______________ is a large, saw-toothed, flat, fan-shaped muscle positioned between the ribs and the scapula. It's called the boxer's muscle.A) levator scapulaeB) serratus anteriorC) subclaviusD) pectoralis minor
Which nerve innervates the muscles of mastication?a. Musculocutaneous nb. Facial nc. Sciatic nd. Radial ne. Trigeminal n
Which of the following muscles elevates and retracts (adducts) the scapula?A) Pectoralis minorB) Rhomboid major C) SubclaviusD) Serratus anterior
What is the diamond-shaped region between the lower appendages called?A) The periosteumB) The pedundal triangleC) The perineumD) The posterior diaphragm E) The coccygeal triangle
When a person blinks, she is using her A) occipitofrontalis muscle. B) orbicularis oris. C) procerus. D) orbicularis oculi.E) depressor labii inferioris.
Acetylcholine exerts its effect byA) stimulating the motor neuron's synaptic knob.B) binding to receptors on ligand-gated sodium channels at the motor end plate.C) activating acetylcholinesterase.D) allowing calcium to enter the cell.
A muscle whose action opposes that of the prime mover is known as a(n) A) agonist. B) antagonist. C) synergist.D) extensor.
Lifting weights will cause muscles to enlarge. This is primarily due toA) an increase in the number of muscle cells.B) an increase in the size of muscle cells.
The ending "glossus" on the name of a muscle refers to A) the tongue. B) mastication.C) the neck. D) swallowing. E) the jaw.
To initiate a smooth muscle cell contraction, calcium enters the cell and binds to A) troponin, which then activates myosin light-chain kinase.B) calmodulin, which then binds to and activates myosin light-chain kinase.C) a myosin head, which then activates calmodulin.D) myosin light-chain kinase, which then hydrolyzes ATP.E) a phosphatase, which then removes the tropomyosin blockade.
Which nerve innervates the muscles of facial expression?a. Musculocutaneous nb. Facial nc. Sciatic nd. Radial ne. Trigeminal n