APHY 101 Exam 4 Latest 2025 Fully Solved
How does the muscular system help maintain normal body temperature? - Answers It produces heat
through cellular respiration of glucose and other nutrients
What does the word "striated" mean, as it pertains to muscle tissue? - Answers It means that the muscle
tissue appears striped, due to its sarcomere structure
Which of the following sets of characteristics correctly describes skeletal muscle tissue? - Answers
Striated, multi-nucleated, voluntary, and arranged in uniform, cylindrical strands
Which type(s) of muscle tissue is/are voluntary? - Answers Skeletal only
All of the following are true of the structure of a sarcomere, except: - Answers The Z-Line runs down the
middle of the A-Band
Endomysium: - Answers A layer of connective tissue that surrounds each muscle fiber in a bundle
Fascia: - Answers A layer of dense connective tissue that surrounds an entire skeletal muscle
Tropomyosin: - Answers One of the proteins that forms a cap over the binding site on actin molecules,
preventing cross-bridging during muscle relaxation
Sarcoplasmic Reticulum: - Answers An organelle that stores and releases Ca+2 for muscle contraction
Motor Unit: - Answers A motor neuron + all of the muscle fibers that it innervates
How is cardiac muscle unique? In other words, how is it different than the other types of muscle tissue?
- Answers It is the only one that contains intercalated disks
What is the function of the synaptic knob in a neuromuscular junction? - Answers It synthesizes
neurotransmitter molecules and releases them into the synaptic cleft
According to the sliding filament theory, what event occurs in each sarcomere that shortens a muscle
during muscle contraction? - Answers The myosin heads form cross-bridges with the actin, and then flip
over, pulling the actin
What is the role of acetylcholinesterase in the process of skeletal muscle contraction? - Answers It
decomposes the neurotransmitter after delivery of its impulse message
When a person begins a period of strenuous exercise, ATP reserves and creatine phosphate are depleted
within 1-2 minutes. The cell next turns to glycolysis for further energy production. What process does
the cell conduct next, in order to obtain more ATP for muscle contraction? - Answers Aerobic respiration
of glucose
How does the muscular system help maintain normal body temperature? - Answers It produces heat
through cellular respiration of glucose and other nutrients
What does the word "striated" mean, as it pertains to muscle tissue? - Answers It means that the muscle
tissue appears striped, due to its sarcomere structure
Which of the following sets of characteristics correctly describes skeletal muscle tissue? - Answers
Striated, multi-nucleated, voluntary, and arranged in uniform, cylindrical strands
Which type(s) of muscle tissue is/are voluntary? - Answers Skeletal only
All of the following are true of the structure of a sarcomere, except: - Answers The Z-Line runs down the
middle of the A-Band
Endomysium: - Answers A layer of connective tissue that surrounds each muscle fiber in a bundle
Fascia: - Answers A layer of dense connective tissue that surrounds an entire skeletal muscle
Tropomyosin: - Answers One of the proteins that forms a cap over the binding site on actin molecules,
preventing cross-bridging during muscle relaxation
Sarcoplasmic Reticulum: - Answers An organelle that stores and releases Ca+2 for muscle contraction
Motor Unit: - Answers A motor neuron + all of the muscle fibers that it innervates
How is cardiac muscle unique? In other words, how is it different than the other types of muscle tissue?
- Answers It is the only one that contains intercalated disks
What is the function of the synaptic knob in a neuromuscular junction? - Answers It synthesizes
neurotransmitter molecules and releases them into the synaptic cleft
According to the sliding filament theory, what event occurs in each sarcomere that shortens a muscle
during muscle contraction? - Answers The myosin heads form cross-bridges with the actin, and then flip
over, pulling the actin
What is the role of acetylcholinesterase in the process of skeletal muscle contraction? - Answers It
decomposes the neurotransmitter after delivery of its impulse message
When a person begins a period of strenuous exercise, ATP reserves and creatine phosphate are depleted
within 1-2 minutes. The cell next turns to glycolysis for further energy production. What process does
the cell conduct next, in order to obtain more ATP for muscle contraction? - Answers Aerobic respiration
of glucose
