A&P TEST 5 ALL ANSWERS CORRECT DETAILED UPDATED 2024/2025 BEST EXAM SOLUTION GRADED TO SCORE A+ FOR SUCCESS

A&P TEST 5 ALL ANSWERS CORRECT DETAILED UPDATED
2024/2025 BEST EXAM SOLUTION GRADED TO SCORE A+
FOR SUCCESS
A dark band formed by parallel thick filaments that partly overlap the thin filaments is
known as an H
band.
True
False - CORRECT ANSWERS false


The sarcoplasmic reticulum is the smooth endoplasmic reticulum of a muscle fiber.
True
False - CORRECT ANSWERS true


Clinically, dystrophin is the most important noncontractile protein to occur in muscle fibers.
True
False - CORRECT ANSWERS true


The sliding filament theory of muscle contraction has emerged from research only in the last
10 to 15
years.
True
False - CORRECT ANSWERS false


A deficiency of acetylcholine receptors leads to muscle paralysis in myasthenia gravis.
True
False - CORRECT ANSWERS true


An isometric contraction does not change muscle length.
True
False - CORRECT ANSWERS true


Some smooth muscle is autorhythmic.
True

,A&P TEST 5 ALL ANSWERS CORRECT DETAILED UPDATED
2024/2025 BEST EXAM SOLUTION GRADED TO SCORE A+
FOR SUCCESS
False - CORRECT ANSWERS true


If one nerve stimulus arrives at a muscle fiber so soon that the fiber does NOT relax at all
from the
previous twitch, the most likely result will be __________. This can only be achieved in the
laboratory.
fatigue
spasm
incomplete tetanus
complete tetanus
wave summation - CORRECT ANSWERS complete tetanus


All muscle types will respond to an electrical stimulus because all muscle cells are
_________.
excitable
contractile
striated
involuntary
isometric - CORRECT ANSWERS excitable


Skeletal muscle is called ___________, because it is usually subject to conscious control.
excitable
contractile
striated
voluntary
isometric - CORRECT ANSWERS voluntary


When a skeletal muscle lengthens, its __________ helps resist excessive stretching and
subsequent
injury to the muscle.
thick filaments

,A&P TEST 5 ALL ANSWERS CORRECT DETAILED UPDATED
2024/2025 BEST EXAM SOLUTION GRADED TO SCORE A+
FOR SUCCESS
collagen
actin
troponin-tropomyosin complex
varicosities - CORRECT ANSWERS collagen


Extensibility refers to the ability of a muscle to stretch.
True
False - CORRECT ANSWERS True


Which of the following marks the boundaries of a sarcomere?
I bands
H bands
Z discs
M lines
A bands - CORRECT ANSWERS z discs


Which of the following is predominately made up of myosin?
G actin
F actin
The thin filament
The thick filament
The elastic filament - CORRECT ANSWERS The thick filamen


Which of the following contains overlapping thick and thin filaments?
A band
H band
I band
M line
Z discs - CORRECT ANSWERS a band

, A&P TEST 5 ALL ANSWERS CORRECT DETAILED UPDATED
2024/2025 BEST EXAM SOLUTION GRADED TO SCORE A+
FOR SUCCESS

Which of the following is not a purpose of the excess postexercise oxygen consumption
(EPOC) in
muscle?
To neutralize carbon dioxide buildup
To replenish the phosphagen system
To oxidize lactate
To serve elevated metabolic rate
To restore resting levels of ATP and CP - CORRECT ANSWERS To neutralize carbon dioxide
buildup


Which muscle type depends solely on the sarcoplasmic reticulum as its calcium source?
Skeletal muscle
Smooth muscle
Cardiac muscle
Skeletal and smooth muscle
Smooth and cardiac muscle - CORRECT ANSWERS skeletal muscle


Which muscle(s) can contract without the need for nervous stimulation?
Skeletal muscle only
Smooth muscle only
Cardiac muscle only
Smooth and cardiac muscle
Skeletal, smooth and cardiac muscle - CORRECT ANSWERS Smooth and cardiac muscle


80% of the lactate produced by skeletal muscle is converted to pyruvate by the __________.
kidneys
liver
muscle tissue
sarcoplasmic reticulum