Answer Options:
a) Intermediate filament network
b) sarcoplasmic reticulum
c) myofibril network
d) mitochondria
Answer: b) sarcoplasmic reticulum
Question: Which of the muscles listed below cannot be seen from posterior?
Answer Options:
Rectus femoris
Gluteus maximus
Gastrocnemius
Semimembranosus
Answer: Rectus femoris
Question: The most medial muscle of the “hamstring group” is the ______.
Answer Options:
Semimembranosus
Vastus medialis
Rectus femoris
Semitendinosus
Answer: Semimembranosus
Question: The medial forearm bone is the ________ (one word).
Answer: ulna
Question: What structure in skeletal muscle cells functions in calcium storage?
Answer Options:
intermediate filament network
sarcoplasmic reticulum
myofibrillar network
mitochondria
Answer: sarcoplasmic reticulum
Question: What is the role of troponin in skeletal muscles?
Answer Options:
Troponin serves as a contraction inhibitor by blocking the actin binding sites on the myosin molecules.
Troponin is the chemical that activates the myosin heads.
Troponin is the receptor for the motor neuron neurotransmitter.
Troponin serves as a contraction inhibitor by blocking the myosin binding sites on the actin molecules.
Answer: Troponin serves as a contraction inhibitor by blocking the actin binding sites on the myosin molecules.
Question: Name the muscle used to compress the cheek, as in when drinking from a straw.
Answer: Buccinator
Question: Which of the following is an excitatory neurotransmitter secreted by motor neurons innervating skeletal muscle?
Answer Options:
a) acetylcholine
b) gamma-aminobutyric acid
c) norepinephrine
d) cholinesterase
Answer: a) acetylcholine
Question: The portion of the sternum that joins with the clavicles is the ________.
Answer Options:
Body
Sternal angle
Manubrium
Xiphoid process
Answer: Manubrium
Question: The PCL is a structure in the knee joint. What does PCL stand for? (3 words)
Answer: posterior cruciate ligament
Question: Which of the following is the correct sequence of events for muscle contractions?
Answer Options:
neurotransmitter release, motor neuron action potential, muscle cell action potential, release of calcium ions from SR, ATP-driven power stroke
motor neuron action potential, neurotransmitter release, muscle cell action potential, release of calcium ions from SR, ATP-driven power stroke, sliding of myofilaments
muscle cell action potential, neurotransmitter release, ATP-driven power stroke, calcium ion release from SR, sliding of myofilaments
Answer: motor neuron action potential, neurotransmitter release, muscle cell action potential, release of calcium ions from SR, ATP-driven power stroke, sliding of myofilaments
Question: A person who has been diagnosed with a sprained ankle has an injury to the ligaments that attach to that joint.
Answer Options:
True
False
Answer: True