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BIO 152 FINAL EXAM PREP QUESTIONS WITH COMPLETE SOLUTIONS; NEW VERSION 2025, GRADED A+
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  • Course
  • BIO 152
  • Institution
  • BIO 152
  • Book
  • Essential Human Anatomy and Physiology

This exam test is written to expose managers in practice, experts, professionals and students to the reality of applying the concepts of HUMAN ANATOMY AND PHYSIOLOGY

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  • January 10, 2025
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  • 2024/2025
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BIO 152 FINAL EXAM PREP QUESTIONS WITH
COMPLETE SOLUTIONS; GUARANTEED TO PASS


e. All of the choices are correct except for myosin - 9. The thin filament in skeletal muscle contains
_____ molecules.

a. actin
b. myosin
c. troponin
d. tropomyosin
e. All of the choices are correct except for myosin

a. actin, myosin - 9. Cross-bridges form between _____ and _____ during muscular contraction.

a. actin, myosin
b. actin, tropomyosin
c. myosin, troponin
d. myosin, tropomyosin
e. troponin, calmodulin

b. initiate changes in protein conformation that expose myosin-binding sites on actin. - 9. The role of
Ca2+ in the control of muscle contraction is to

*a.* cause depolarization of the T tubule system.
*b.* initiate changes in protein conformation that expose myosin-binding sites on actin.
*c.* change the conformation of myosin heads, thus causing microfilaments to slide past each other.
*d.* bind to tropomyosin and break actin-myosin cross-bridges.
*e.* block the ATP-binding site on myosin heads, enabling muscles to relax.

a. It stores Ca2+ ions for release during contraction. - 9. What is the role of the sarcoplasmic reticulum in
muscle contraction?

a. It stores Ca2+ ions for release during contraction.
b. It surrounds and protects the muscle filaments.
c. It provides sites of ATP synthesis.
d. It depolarizes when stimulated by an impulse.
e. It synthesizes actin and myosin filaments.

e. insects and crustaceans - 9. Exoskeletons are used for movement by which of the following animals?

a. insects

,b. cnidarians
c. crustaceans
d. humans
e. insects and crustaceans

e. Myosin heads have ATPase activity and interact with actin. - 9. Which statement about a myosin
filament in skeletal muscle is true?

a. A thick filament consists of actin and myosin.
b. Myosin filaments consist of linear troponin molecules attached to tropomyosin heads.
c. Troponin binds to the head of the myosin molecule.
d. Myosin activity is regulated by tropomyosin, which binds to myosin tails.
e. Myosin heads have ATPase activity and interact with actin.

e. actin and myosin cannot separate without ATP. - 9. When animals die, muscles stiffen in rigor mortis
because

a. muscles cannot contract without ATP.
b. actin and myosin cannot bind without ATP.
c. ATP is required for synthesis of protein filaments.
d. ATP forms cross-bridges between filaments.
e. actin and myosin cannot separate without ATP.

a. they form from fusion of many embryonic stem cells. - 9. Skeletal muscle cells are multinucleate
because

a. they form from fusion of many embryonic stem cells.
b. they need to be large to absorb their metabolic waste.
c. the nucleus of the skeletal precursor cell undergoes mitosis many times in the absence of cytokinesis
to create the muscle cell.
d. the many nuclei provide the large amounts of ATP these cells need.
e. the many nuclei store the large amounts of glycogen these cells use.

d. adenosine triphosphate (ATP). - 9. *Release* of cross-bridges depends most directly on

a. calcium ions.
b. potassium ions.
c. adenosine diphosphate (ADP).
d. adenosine triphosphate (ATP).
e. creatine phosphate.

a. exoskeleton - 9. Which of the following types of skeletons must be shed typically for an animal to
grow?

a. exoskeleton
b. endoskeleton
c. hydrostatic skeleton
d. All choices are correct.

, e. None of the choices are correct.

b. Are involuntary - 9. Smooth muscle and cardiac muscle cells differ from skeletal muscle because they:

a. Are striated
b. Are involuntary
c. Do not contain thick filaments
d. Do not contain thin filaments
e. Are voluntary

b. myosin - 9. Which of the following proteins contains an ATP binding site?

a. actin
b. myosin
c. troponin
d. tropomyosin
e. All of the choices are correct

a. calcium, troponin - 9. In muscle function at the sarcomere level, the binding of ___ ions to ____
regulates the formation of cross-bridges.

a. calcium, troponin
b. calcium, tropomyosin
c. calcium, myosin
d. sodium, troponin
e. sodium, tropomyosin

a. The muscles are attached to a living support structure. - 9. Which statement about the endoskeletons
of vertebrates is true?

a. The muscles are attached to a living support structure.
b. Endoskeletons are inert systems.
c. Molting is necessary in animals with endoskeletons.
d. Endoskeletons consist of chitin containing calcium.
e. At least one skeletal structure is required to form a joint.

a. sarcoplasmic reticulum. - 9. The primary reservoir for calcium that is released during excitation-
contraction coupling in a skeletal muscle fiber is

a. sarcoplasmic reticulum.
b. endoplasmic reticulum.
c. transverse tubules.
d. Golgi bodies.
e. troponin.

d. Endoskeletons use tendons to attach skeletal muscles to bone. - 9. Which statement about skeletal
systems is true?

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