bio kahoot muscle Flashcards
The epimysium covers
the muscle
Which muscles have a single nucleus
Cardiac and smooth
A single motor neuron and all of the muscle fibers it innervates
motor unit
Order from most to least complex
Muscle, fascicle, muscle fiber, myofibril
The smallest unit of muscle structure
sacromere
Calcium binds to
troponin
Sustained contraction that lacks even partial relaxation between stimuli
Tetanus
Order steps of muscle contraction
Nerve action travels down motor neuron and release ach
Ach binds to receptors so sodium channels open causing depolarization
T tubules trigger sarcoplasmic reticulum to release calcium
Calcium binds to troponin, removing tropomyosin from actin binding sites
What is released into the NMJ to stop muscle contraction
Acetylcholinesterase
Characteristics of oxidative glycolytic fibers
Pink, walking, medium amount of mitochondria
Characteristics of fast glycoltic fibers
White, weight lifting, little mitochondria
characteristics of slow oxidative fibers
Red, endurance running, give ATP slow
Time during which muscle tension increases
contraction period
Time lag between when stimulus is applied and when contraction occurs
latent period
Time during which muscle tension decreases, and muscle returns to resting state
refactory period
Prime mover of elbow flexion
Brachialis
Deltoid movements
Flex arm, extend arm, abduct arm
Order erector spinae from lateral to medial
Iliocostalis, longissimus, spinalis
The external abdominal obliques cause _______ rotation when contracted unilaterally
Contralateral
The internal abdominal obliques cause ______ rotation when contracted unilaterally
Ipsilateral
The internal intercostals are used for ____ and ____ the ribcage
Expiration, depress
Triceps brachii is named for
Having 3 heads
Hamstring muscles include
Biceps femoris, semitendinosus, semimembranosus
Quadriceps muscles
Prime mover of knee extension, strongest muscles in body
Most muscles cross at least one
joint
The iliotibial band is a combination of
Gluteus maximus, tensor fasciae latae
Wrist flexors from medial to lateral
Flexor carpi ulnaris, palmaris longus, flexor carpi radialis
Hand and eye muscles have ____ fibers
Fast oxidative glycolytic
Produces backward swing of arm
Latissmus dorsi
Dorsiflexes and inverts the foot
Tibialis anterior
Prime mover of the shoulder joint
Pectoralis major, latissimus dorsi
Orbicularis oculi has a _____ arrangement
Circular
Flexes fingers 2-5
Flexor digitorum superficialis
Muscle fatigue occurs with
Decreased blood flow, ion imbalances across sarcolemma, accumulation of lactic acid
Have the largest diameter
Fast glycolytic
