Answer Options:
True
False
Answer: True
Question: Excitation-contraction coupling requires which of the following substances?
Answer Options:
Ca²⁺ only
Ca²⁺ and ATP
ATP only
ATP and glucose
Answer: Ca²⁺ and ATP
Question: Most skeletal muscles contain ________.
Answer Options:
a mixture of fiber types
a predominance of slow oxidative fibers
a predominance of fast oxidative fibers
muscle fibers of the same type
Answer: a mixture of fiber types
Question: What is the functional unit of a skeletal muscle called?
Answer Options:
the sarcoplasmic reticulum
a myofibril
a my
ofilament
a sarcomere
Answer: a sarcomere
Question: The periosteum is secured to the underlying bone by dense connective tissue called ________.
Answer Options:
Volkmann’s canals
a bony matrix with hyaline cartilage
the struts of bone known as spicules
perforating (Sharpey’s) fibers
Answer: perforating (Sharpey’s) fibers
Question: An increase in the calcium ion level in the sarcoplasm starts the sliding of the thin filaments. When the level of calcium ions declines, sliding stops.
Answer Options:
True
False
Answer: True
Question: Bipolar neurons are commonly _______.
Answer Options:
found in the retina of the eye
found in ganglia
motor neurons
called neuroglial cells
Answer: found in the retina of the eye
Question: What is the functional unit of a skeletal muscle called?
Answer Options:
sarcomere
myofibril
myofilament
the sarcoplasmic reticulum
Answer: sarcomere
Question: Muscles are only able to pull, they never push.
Answer Options:
A. True
B. False
**
Answer: B. False
Question: Which of the following is the correct sequence of events for muscle contractions?
Answer Options:
a) neurotransmitter release, muscle cell action potential, motor neuron action potential, release of calcium ions from SR, sliding of myofilaments, ATP-driven power stroke
b) neurotransmitter release, motor neuron action potential, muscle cell action potential, release of calcium ions from SR, ATP-driven power stroke
Answer: b) neurotransmitter release, motor neuron action potential, muscle cell action potential, release of calcium ions from SR, ATP-driven power stroke
Question: Eccentric contractions are more forceful than concentric contractions.
Answer Options:
True
False
Answer: True
Question: The process of bones increasing in width is known as ________.
Answer Options:
epiphyseal plate closure
closing of the epiphyseal plate
appositional growth
concentric growth
Answer: appositional growth