BIO 252 FINAL EXAM CHAMBERLAIN LV EXAM
NEWEST 2025 ACTUAL EXAM
Muscle Tissue Property: Electrical Excitability - correct answer-
ions are charged molecules that have different concentrations between a semipermeable membrane
Muscular Tissue Property: Contractility - correct answer-the ability to forcefully contract
Muscular Tissue Property: Extensibility - correct answer-the ability to stretch
Muscular Tissue Property: Elasticity - correct answer-the ability to return to your original shape
Microscopic Anatomy of a Skeletal Muscle Fiber - correct answer--
each mature skeletal muscle fiber has 100+ nuclei
-once fusion has occurred the muscle fiber loses its ability to undergo cell division
-skeletal muscles are set before you are born and last a life time
Control of Muscle Tension: Sliding Filament Mechanism - correct answer--
myosin pulls on actin, causing thin filament to slide forward
-consequently, Z discs move toward each other and the sarcomere shortens
-thanks to structural proteins, there is a transmission of force throughout the entire muscle
***Filaments do not change in length
Isotonic - correct answer-tension is constant while muscle length changes
-concentric=picking up book
-eccentric=lowering book
Isometric - correct answer-muscle contracts but does not change length
-holding a book out steady
,actin - correct answer-
During active muscle contraction, myosin heads bind to the protein .
calcium - correct answer-
is released from the sarcoplasmic reticulum and plays a key role in active muscle c
ontraction
Functions of Skeletal System - correct answer-1. facillitating movement
2. generating heat (thermogenesis)
3. Storing glycogen
4. maintaining body posture
How individual muscle fibers generate ATP - correct answer-1. glycolysis (anaerobic respiration)
2. hydrolysis of creatine phosphate
3. krebs cycle/electron transport chain (aerobic respiration)
actin,myosin - correct answer-
In a given muscle fiber, the thin filaments are known as , and the thick filaments are k
nown as .
Components of Skeletal Muscle (Lg to Sm) - correct answer-1. Skeletal Muscle
2. Fascicle
3. Muscle Fiber (cell)
4. Myofibrol
5. Filaments
Sarcolemma - correct answer-cell membrane of individual muscle cell
Origin - correct answer-the attachment to the stationary bone (bone that does not move) Proximal
Insertion - correct answer-the attachment to the movable bone (distal)
, Fulcrum - correct answer-elbow joint
U2 U2 U2 U2
Effort - correct answer-amount of force
U2 U2 U2 U2 U2
U2 ex: contraction of biceps brachii
U2 U2 U2 U2
Load - correct answer-weight of object plus forearm (resistance)
U2 U2 U2 U2 U2 U2 U2 U2
U2 (opposes movement) U2
Muscles of the thigh that move the femur, tibia and fibula:
U2 U2 U2 U2 U2 U2 U2 U2 U2 U2
Quadriceps Femoris = Four heads U2 U2 U2 U2
1. Rectus femoris U2
2. Vastus lateralis U2
3. Vastus medialis U2
4. Vastus intermedius - correct answer-
U2 U2 U2 U2
all four heads extend leg at knee joint; rectus femoris muscle acting alone also flexes thigh at
U2 U2 U2 U2 U2 U2 U2 U2 U2 U2 U2 U2 U2 U2 U2 U2
hip joint
U2 U2
Muscles of the thigh that move the femur, tibia and fibula:
U2 U2 U2 U2 U2 U2 U2 U2 U2 U2
Sartorius - correct answer- U2 U2 U2
weakly flexes leg out at knee joint; weakly flexes, abducts, and laterally rotates thigh at hip joint
U2 U2 U2 U2 U2 U2 U2 U2 U2 U2 U2 U2 U2 U2 U2 U2
Muscles of the thigh that move the femur, tibia and fibula:
U2 U2 U2 U2 U2 U2 U2 U2 U2 U2
Hamstrings:
1. Biceps femoris U2
2. Semitendinosus
3. Semimembranosus - correct answer-flexes leg at knee joint and extends the thigh at hip joint
U2 U2 U2 U2 U2 U2 U2 U2 U2 U2 U2 U2 U2 U2
Muscles of the thigh that move the femur, tibia and fibula:
U2 U2 U2 U2 U2 U2 U2 U2 U2 U2
Gracilis - correct answer-adducts thigh at hip joint, medially rotates thigh, flexes leg at knee joint
U2 U2 U2 U2 U2 U2 U2 U2 U2 U2 U2 U2 U2 U2 U2
Central Nervous System (CNS) - correct answer-brain and spinal cord
U2 U2 U2 U2 U2 U2 U2 U2 U2
NEWEST 2025 ACTUAL EXAM
Muscle Tissue Property: Electrical Excitability - correct answer-
ions are charged molecules that have different concentrations between a semipermeable membrane
Muscular Tissue Property: Contractility - correct answer-the ability to forcefully contract
Muscular Tissue Property: Extensibility - correct answer-the ability to stretch
Muscular Tissue Property: Elasticity - correct answer-the ability to return to your original shape
Microscopic Anatomy of a Skeletal Muscle Fiber - correct answer--
each mature skeletal muscle fiber has 100+ nuclei
-once fusion has occurred the muscle fiber loses its ability to undergo cell division
-skeletal muscles are set before you are born and last a life time
Control of Muscle Tension: Sliding Filament Mechanism - correct answer--
myosin pulls on actin, causing thin filament to slide forward
-consequently, Z discs move toward each other and the sarcomere shortens
-thanks to structural proteins, there is a transmission of force throughout the entire muscle
***Filaments do not change in length
Isotonic - correct answer-tension is constant while muscle length changes
-concentric=picking up book
-eccentric=lowering book
Isometric - correct answer-muscle contracts but does not change length
-holding a book out steady
,actin - correct answer-
During active muscle contraction, myosin heads bind to the protein .
calcium - correct answer-
is released from the sarcoplasmic reticulum and plays a key role in active muscle c
ontraction
Functions of Skeletal System - correct answer-1. facillitating movement
2. generating heat (thermogenesis)
3. Storing glycogen
4. maintaining body posture
How individual muscle fibers generate ATP - correct answer-1. glycolysis (anaerobic respiration)
2. hydrolysis of creatine phosphate
3. krebs cycle/electron transport chain (aerobic respiration)
actin,myosin - correct answer-
In a given muscle fiber, the thin filaments are known as , and the thick filaments are k
nown as .
Components of Skeletal Muscle (Lg to Sm) - correct answer-1. Skeletal Muscle
2. Fascicle
3. Muscle Fiber (cell)
4. Myofibrol
5. Filaments
Sarcolemma - correct answer-cell membrane of individual muscle cell
Origin - correct answer-the attachment to the stationary bone (bone that does not move) Proximal
Insertion - correct answer-the attachment to the movable bone (distal)
, Fulcrum - correct answer-elbow joint
U2 U2 U2 U2
Effort - correct answer-amount of force
U2 U2 U2 U2 U2
U2 ex: contraction of biceps brachii
U2 U2 U2 U2
Load - correct answer-weight of object plus forearm (resistance)
U2 U2 U2 U2 U2 U2 U2 U2
U2 (opposes movement) U2
Muscles of the thigh that move the femur, tibia and fibula:
U2 U2 U2 U2 U2 U2 U2 U2 U2 U2
Quadriceps Femoris = Four heads U2 U2 U2 U2
1. Rectus femoris U2
2. Vastus lateralis U2
3. Vastus medialis U2
4. Vastus intermedius - correct answer-
U2 U2 U2 U2
all four heads extend leg at knee joint; rectus femoris muscle acting alone also flexes thigh at
U2 U2 U2 U2 U2 U2 U2 U2 U2 U2 U2 U2 U2 U2 U2 U2
hip joint
U2 U2
Muscles of the thigh that move the femur, tibia and fibula:
U2 U2 U2 U2 U2 U2 U2 U2 U2 U2
Sartorius - correct answer- U2 U2 U2
weakly flexes leg out at knee joint; weakly flexes, abducts, and laterally rotates thigh at hip joint
U2 U2 U2 U2 U2 U2 U2 U2 U2 U2 U2 U2 U2 U2 U2 U2
Muscles of the thigh that move the femur, tibia and fibula:
U2 U2 U2 U2 U2 U2 U2 U2 U2 U2
Hamstrings:
1. Biceps femoris U2
2. Semitendinosus
3. Semimembranosus - correct answer-flexes leg at knee joint and extends the thigh at hip joint
U2 U2 U2 U2 U2 U2 U2 U2 U2 U2 U2 U2 U2 U2
Muscles of the thigh that move the femur, tibia and fibula:
U2 U2 U2 U2 U2 U2 U2 U2 U2 U2
Gracilis - correct answer-adducts thigh at hip joint, medially rotates thigh, flexes leg at knee joint
U2 U2 U2 U2 U2 U2 U2 U2 U2 U2 U2 U2 U2 U2 U2
Central Nervous System (CNS) - correct answer-brain and spinal cord
U2 U2 U2 U2 U2 U2 U2 U2 U2
