Principles of Biology
2nd Edition
ISBN: 9781259875120
Author: Robert Brooker, Eric P. Widmaier Dr., Linda Graham Dr. Ph.D., Peter Stiling Dr. Ph.D.
Publisher: McGraw-Hill Education
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Question
Chapter 35, Problem 4TY
Summary Introduction
Introduction:
Thick filament consists of a core of elastic protein that is known as titin. Titin extends from each end of the thick filament across the I band to the Z line on each side. Titin is referred to as molecular spring as it recoils after stretching. Thick filaments also contain about 300 myosin molecules that are made up of pair of myosin subunits that are twisted around each other.
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Which of the following regions of a sarcomere at rest is characterized by the presence of myosin only?
a) A band
b) H zone
c) I band
d) Z line
Actin exits in two forms, a globular G form ( the free subunit) and a filamentous Fform( assembled into a filament.
true
false
Which of the following regions of a sarcomere does not change length during a contraction because it represents the length of the thick myosin filaments.
Group of answer choices
Z disk
H band
A band
I band
Chapter 35 Solutions
Principles of Biology
Ch. 35.1 - Prob. 1CCCh. 35.1 - Prob. 1TYKCh. 35.1 - Prob. 2TYKCh. 35.2 - Prob. 1CCCh. 35.2 - Rigor mortis is the condition that occurs shortly...Ch. 35.2 - Prob. 1BCCh. 35.2 - Prob. 3CCCh. 35.2 - Prob. 2BCCh. 35.2 - Prob. 1TYKCh. 35.2 - Prob. 2TYK
Ch. 35.3 - Prob. 1TYKCh. 35.4 - Prob. 1TYKCh. 35.4 - Prob. 2TYKCh. 35 - Prob. 1TYCh. 35 - Which, if any, of the following is not a function...Ch. 35 - Prob. 3TYCh. 35 - Prob. 4TYCh. 35 - Prob. 5TYCh. 35 - During cross-bridge cycling, binds to _________,....Ch. 35 - Prob. 7TYCh. 35 - Prob. 8TYCh. 35 - Prob. 9TYCh. 35 - Prob. 10TYCh. 35 - Prob. 1CCQCh. 35 - Prob. 2CCQCh. 35 - Prob. 3CCQCh. 35 - Discuss the structure and function of the two...Ch. 35 - Prob. 2CBQ
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- Nerve impulses first stimulate a skeletal muscle fiber at _______. a. T tubules b. sarcomeres c. neuromuscular junctions d. actin binding sitesarrow_forwarda muscle cell structural element that consist primarily of an actin filament is a/an______arrow_forwardCan you match the sacromere anatomy with the proper answer from the list below the table graph? Sarcomere Anatomy Description/Reaction Thin Filaments ? Thick Filaments ? A Band ? I Band ? M Line ? H Zone ? Z Disc ? A) G-Actin, F-Actin, Troponin, Tropomyosin B) Myosin C) Bisected by the M Line, this area shows only the thick filaments without any thin filamentous overlap D) The point of origin for myosin filaments found in the center of the sarcomere E) An area in the center of the sarcomere marked by the entire length of the thick filaments F) A space between sarcomeres with the z-disc in the center; this region shows Actin's anchorage points and extension without myosin overlap G) Anchoring point for the thin filamentsarrow_forward
- A sarcomere contracts when a) Thin filaments (actin) slide b) Thick filaments (myosin) slide c) Thin filaments (actin) contract d) Thick filaments (myosin ) contractarrow_forwardFunctions of: a. Collagen fibers b. Elastic fibers c. Reticular fibersarrow_forwardThin and thick filaments are organized into functionalunits called ________.a. myofibrilsb. myofilamentsc. T-tubulesd. sarcomeresarrow_forward
- Each sarcomere contains two sets of thin filaments. What are they? What is their function?arrow_forwardThe shortening of _____________ will cause the shortening of a muscle fiber. Z lines thin filaments sarcomeres thick filamentsarrow_forwardDuring sarcomere contraction, _________ first has to bind to ________ Select one: a. Calcium, troponin b. Calcium, microfilaments c. Sodium, troponin d. Sodium tropomysin e. Potassium, microfilamentsarrow_forward
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