Bio 223A In Class Quiz Flashcards
What do we call the structural and functional unit of skeletal muscle cell?
Sarcomere
In the sarcomere what is the place that contains both actin and myosin myofilaments?
A band
What do we call a sustained muscle contraction?
Tetanus
Depolarization of the cell occurs with a rapid influx of which ion?
Sodium
What term do we use as an example of a greater response that can contribute to muscle deficiency and is achieved during warm up?
Treppe
What stores calcium ions?
Sarcoplasmic reticulum
What characteristic defines that muscle responds to
stimulation by the nervous system?
Excitability
What characteristic describes the muscle ability to
shorten?
Contractibility
What connects to two rectum abdominal muscles?
Línea alba
What is the triangular muscle on the superior part of the shoulder?
Deltoid
What is the condition of which stimulus occurs so rapidly, there are no intertwining contractions?
Complete tetanus
What do we call the invagination of sarcolemma?
T-tubules
What results in a lack of acetylcholine in the cleft?
Postsynaptic membrane
What do the synaptic vesicles in the neurovascular contain?
Acetylcholine
What do we call channels that open and close in the change of voltage in the plasma membrane?
Voltage gated channels
What is the model that describes the contraction of the muscle?
Sliding filament model
In what way are smooth muscle and cardiac muscle similar?
Both are involuntary
Which muscle type is responsible for constriction of organs?
Smooth muscles
What does the muscle extensor Hallucis longus do?
Extends the great toe
What sort of chemical is acetylcholine?
Neurotransmitter
Which muscle is involved in chewing gum?
Masseter and temporalis
Which muscle of the head wraps around the organs?
Orbicularis oculi
On what basis is the trapezius muscle named?
Shape of muscle
If you have a group of muscles working together what term will we use for that?
Synergists
After exercise the oxygen taken in that exceeds the oxygen requirement is the?
Oxygen debt
What type of muscle fatigue is the result of the emotional state of an individual?
Psychological fatigue
What term do we use for the constant tension produced by muscles for long periods of time?
Muscle tone
What term do we use for the constant tension produced by muscles for long periods of time?
Muscle tone
What is the period during which time the tissue for muscle cannot respond to a stimulus again?
Refractory period
If you give your patient a drug that interferes with active transport of calcium ions from the sarcoplasm to the Sarcoplasmic Reticulum?
Continuous contraction with no relaxation
What would happen if sodium ions cant enter muscle fiber in response to a muscle stimulus?
Contractions can’t occur
Acetylcholine binds to a membrane bound response causing ligand sodium channels to open, what does it result in?
Depolarization
What do you call the site where a chemical substance is transmitted from the pre synaptic terminal to the postsynaptic membrane of a fiber?
Neuromuscular junction
During the resting membrane potential of the cell which cell is contracted primarily inside the cell?
Potassium ions
On what active sites to which cross bridge attachment is found?
Actin myofilaments
What is the connective tissue that surrounds the fascicles?
Perimysium
Which class level system will the flex of the elbow represent?
3rd class level system
On what basis is the brachioradialis named?
Origin and insertion
Which muscles hold the head of the humerus in the glenoid fossa of the scapula?
Rotator cuff muscles
Name the rotator muscle?
supraspinatus, infraspinatus, teres minor & subscapularis (SITS)
What type of muscle tissue has neuromuscular junctions?
Skeletal muscles
What is a cross bridge?
Actin and myosin connect
What are the outer boundaries of a sarcomere?
Z disc
What is the longest muscle in the body?
Sartorius
Which muscle is inserted in the calcaneus of the achilles tendon
Gastrocnemius
What is the common site for injections?
Gluteus medius
What does the extensor pollicis brevis do?
Thumbs
Closing and puckering lips to kiss someone is what muscle?
Orbicularis oris
If you have a well developed mentalis muscle what does that result in?
Dimple chin
Muscles that have fossils that have feathers?
Pennate
What is a triad?
2 terminal cisternae and corresponding T-tubule in middle
Which protein has a calcium binding site?
Troponine
Which type of muscle tissue is multinucleated?
Skeletal muscle
Which type of muscle is causing vasal constrictions?
Smooth muscle
