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Bio 252 Final Exam Chamberlain LV Study Guide with Complete Solutions
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Bio 252 Final Exam Chamberlain LV Study Guide with Complete Solutions Muscle Tissue Property: Electrical Excitability - Ans:-ions are charged molecules that have different concentrations between a semipermeable membrane Muscular Tissue Property: Contractility - Ans:-the ability to forcefully co...

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  • October 23, 2024
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©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED

FIRST PUBLISH OCTOBER 2024




Bio 252 Final Exam Chamberlain LV
Study Guide with Complete Solutions


Muscle Tissue Property: Electrical Excitability - Ans:✔✔-ions are charged molecules that have different

concentrations between a semipermeable membrane


Muscular Tissue Property: Contractility - Ans:✔✔-the ability to forcefully contract


Muscular Tissue Property: Extensibility - Ans:✔✔-the ability to stretch


Muscular Tissue Property: Elasticity - Ans:✔✔-the ability to return to your original shape


Microscopic Anatomy of a Skeletal Muscle Fiber - Ans:✔✔--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 - Ans:✔✔--myosin pulls on actin, causing thin

filament to slide forward


-consequently, Z discs move toward each other and the sarcomere shortens
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, ©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED

FIRST PUBLISH OCTOBER 2024




-thanks to structural proteins, there is a transmission of force throughout the entire muscle


***Filaments do not change in length


Isotonic - Ans:✔✔-tension is constant while muscle length changes


-concentric=picking up book


-eccentric=lowering book


Isometric - Ans:✔✔-muscle contracts but does not change length


-holding a book out steady


actin - Ans:✔✔-During active muscle contraction, myosin heads bind to the protein _______________.


calcium - Ans:✔✔-________________ is released from the sarcoplasmic reticulum and plays a key role in

active muscle contraction


Functions of Skeletal System - Ans:✔✔-1. facillitating movement


2. generating heat (thermogenesis)


3. Storing glycogen


4. maintaining body posture


How individual muscle fibers generate ATP - Ans:✔✔-1. glycolysis (anaerobic respiration)
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, ©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED

FIRST PUBLISH OCTOBER 2024




2. hydrolysis of creatine phosphate


3. krebs cycle/electron transport chain (aerobic respiration)


actin,myosin - Ans:✔✔-In a given muscle fiber, the thin filaments are known as _____________, and the

thick filaments are known as _____________.


Components of Skeletal Muscle (Lg to Sm) - Ans:✔✔-1. Skeletal Muscle


2. Fascicle


3. Muscle Fiber (cell)


4. Myofibrol


5. Filaments


Sarcolemma - Ans:✔✔-cell membrane of individual muscle cell


Origin - Ans:✔✔-the attachment to the stationary bone (bone that does not move) Proximal


Insertion - Ans:✔✔-the attachment to the movable bone (distal)


Fulcrum - Ans:✔✔-elbow joint


Effort - Ans:✔✔-amount of force




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