BIOS 252 – Anatomy and Physiology II |
Exam 1 Complete Questions and Verified
Answers (2025/2026)
QUESTION
what connective tissue is best described as surrounding 10-100 muscle fibers separating them
into bundles known as fascicles?
a- endomysium
b-supramysium
c-perimysium
d-epimysium
Answer:
perimysium
QUESTION
The muscle fiber (cell) is an important part of the organization of muscle tissue in a skeletal
muscle. The organization of muscle tissue from smallest to largest is?
Answer:
Filament, myofibril, fiber, fascicle, skeletal muscle
QUESTION
What is the most common neurotransmitter used at the neuromuscular junction to excite the
sarcolemma?
A- ACh
b- GABA
c- serotonin
d- epinephrine
Answer:
ACh (acetylcholine)
,QUESTION
what is the plasma membrane of a muscle cell (fiber) called?
a- sarcoplasmic reticulum
b- acetylcholine
c- sarcomere
d- sarcolemma
Answer:
Sarcolemma
QUESTION
sliding filament theory
Answer:
theory that actin filaments slide toward each other during muscle contraction, while the myosin
filaments are still
QUESTION
The neurotransmitter used at the neuromuscular junction is acetylcholine (ACh) T/F
Answer:
True
QUESTION
In the sliding filament theory, the protein filaments shorten to create a muscle spasm. t/f
Answer:
false
QUESTION
a connection formed between the actin and myosin is known as what?
,Answer:
cross bridge
QUESTION
what channel will ACh attach to?
Answer:
Ligand-gated channel
QUESTION
AChE helps to break down the neurotransmitter ACh and aide in its removal from the synapse.
T/F
Answer:
True
QUESTION
What is the name of the cellular structure that when stimulated, releases calcium into the cytosol
of the cell?
a- mitochondria
b-sacromere
c-sarcolemma
d-sarcoplasmic reticulum
Answer:
Sarcoplasmic reticulum
QUESTION
What is the first step in the relaxation sequence?
Answer:
, Preventing release of ACh into the synaptic cleft
QUESTION
what neurotransmitter used at the neuromuscular junction?
Answer:
ACh
QUESTION
In the sliding filament theory, the protein filaments shorten to create a muscle contraction. T/F
Answer:
False
QUESTION
Cardiac muscle is more resistant to fatigue than skeletal muscle. T/F
Answer:
True
QUESTION
Skeletal muscle can create ATP at any time and will never fatigue. T/F
Answer:
False
QUESTION
Creation of ATP
Answer:
Exam 1 Complete Questions and Verified
Answers (2025/2026)
QUESTION
what connective tissue is best described as surrounding 10-100 muscle fibers separating them
into bundles known as fascicles?
a- endomysium
b-supramysium
c-perimysium
d-epimysium
Answer:
perimysium
QUESTION
The muscle fiber (cell) is an important part of the organization of muscle tissue in a skeletal
muscle. The organization of muscle tissue from smallest to largest is?
Answer:
Filament, myofibril, fiber, fascicle, skeletal muscle
QUESTION
What is the most common neurotransmitter used at the neuromuscular junction to excite the
sarcolemma?
A- ACh
b- GABA
c- serotonin
d- epinephrine
Answer:
ACh (acetylcholine)
,QUESTION
what is the plasma membrane of a muscle cell (fiber) called?
a- sarcoplasmic reticulum
b- acetylcholine
c- sarcomere
d- sarcolemma
Answer:
Sarcolemma
QUESTION
sliding filament theory
Answer:
theory that actin filaments slide toward each other during muscle contraction, while the myosin
filaments are still
QUESTION
The neurotransmitter used at the neuromuscular junction is acetylcholine (ACh) T/F
Answer:
True
QUESTION
In the sliding filament theory, the protein filaments shorten to create a muscle spasm. t/f
Answer:
false
QUESTION
a connection formed between the actin and myosin is known as what?
,Answer:
cross bridge
QUESTION
what channel will ACh attach to?
Answer:
Ligand-gated channel
QUESTION
AChE helps to break down the neurotransmitter ACh and aide in its removal from the synapse.
T/F
Answer:
True
QUESTION
What is the name of the cellular structure that when stimulated, releases calcium into the cytosol
of the cell?
a- mitochondria
b-sacromere
c-sarcolemma
d-sarcoplasmic reticulum
Answer:
Sarcoplasmic reticulum
QUESTION
What is the first step in the relaxation sequence?
Answer:
, Preventing release of ACh into the synaptic cleft
QUESTION
what neurotransmitter used at the neuromuscular junction?
Answer:
ACh
QUESTION
In the sliding filament theory, the protein filaments shorten to create a muscle contraction. T/F
Answer:
False
QUESTION
Cardiac muscle is more resistant to fatigue than skeletal muscle. T/F
Answer:
True
QUESTION
Skeletal muscle can create ATP at any time and will never fatigue. T/F
Answer:
False
QUESTION
Creation of ATP
Answer:
