Biology: The Unity and Diversity of Life
15th Edition
ISBN: 9780357093795
Author: STARR
Publisher: CENGAGE LEARNING (CUSTOM)
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Textbook Question
Chapter 35, Problem 14SQ
The sarcoplasmic reticulum stores and releases ________.
- a. ACh
- b. Calcium ions
- c. ATP
- d. Phosphate ions
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1. Calcium triggers the contraction of a muscle fiber. Where in the muscle fiber is this calcium stored?
A. nucleus
B. calcium vesicles
C. sarcoplasmic reticulum
D. Golgi apparatus
E. mitochondria
If a drug caused a sudden release of large amounts of calcium in skeletal muscle, from which structure would the calcium come? A. Sarcosomes B. Sarcoplasmic reticulum C. Sarcolemma D. Epimysium
Muscle relaxation occurs when ________. a. calcium ions are actively transported out of the sarcoplasmic reticulum b. calcium ions diffuse out of the sarcoplasmic reticulum c. calcium ions are actively transported into the sarcoplasmic reticulum d. calcium ions diffuse into the sarcoplasmic reticulum
Chapter 35 Solutions
Biology: The Unity and Diversity of Life
Ch. 35 - Prob. 1DAACh. 35 - Prob. 2DAACh. 35 - Prob. 3DAACh. 35 - Prob. 4DAACh. 35 - An endoskeleton consists of _________. a. a fluid...Ch. 35 - Prob. 2SQCh. 35 - Prob. 3SQCh. 35 - A ligament connects ________. a. bones at a joint...Ch. 35 - Prob. 5SQCh. 35 - The ___ attaches to the pelvic girdle. a. radius...
Ch. 35 - The ________ is the basic unit of contraction. a....Ch. 35 - In sarcomeres, phosphate-group transfers from ATP...Ch. 35 - A sarcomere shortens when ________. a. thick...Ch. 35 - Prob. 10SQCh. 35 - Prob. 11SQCh. 35 - A motor unit is _________. a. a muscle and the...Ch. 35 - _______ from a motor neuron excites a muscle...Ch. 35 - The sarcoplasmic reticulum stores and releases...Ch. 35 - Match the words with their defining feature. _____...Ch. 35 - Continued strenuous activity can cause lactate to...Ch. 35 - After death, calcium pumps no longer function and...Ch. 35 - Bully whippets are homozygous for a deletion of...Ch. 35 - Athletes tend to have stronger bones than...
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- Nervous stimulation of musclesa. occurs at a neuromuscular junction.b. results in an action potential that travels down the T system.c. causes calcium to be released from expanded regions of the sarcoplasmic reticulum.d. All of these are correctarrow_forwardIf a muscle cell had very short T-tubules, how much tension would the muscle fiber create, relative to a normal muscle fiber? Assume sarcoplasmic reticulum can still react to activity at the neuromuscular junction. a)Less tension would be created. b) No difference in tension creation. c) More tension would be created. d) No tension would be created.arrow_forwardStraps of dense, regular connective tissue______ . a. connect muscles to bones c. underlie the skin b. produce blood cells d. lack fibroblastsarrow_forward
- All of the following characteristics apply to skeletal muscle except a. They are striated. b. They are multinucleated. c. They are voluntary. d. They contain intercalated discs. e. They are attached to the skeleton by means of tendons.arrow_forwardWhich of the following statements is True?a. Tendons contract using the sliding filament mechanism.b. Tendons are composed primarily of cartilage fibers.c. Tendons attach bones to bones at joints.d. Tendons attach muscles to bone.arrow_forwardWhich of the following statements about the Ca2+ release channels in the sarcoplasmic reticulum is false? a.They are also called ryanodine receptors. b.They are one-tenth the size of the voltage-gated Ca 2+channels. c.They are opened by Ca2+release channels in the transverse tubules. d.They permit Ca 2+ to diffuse into the sarcoplasm from the sarcoplasmic reticulum.arrow_forward
- Skeletal, smooth, and cardiac muscle are similar in that they all _____. A are divided into motor units B require calcium in order to contract C undergo mitosis frequently to replace dead or damaged cells D have small round cells connected by gap junctionsarrow_forwardOf the 3 kinds of cells found in cartilage, which helps build cartilaginous tissue? Group of answer choices a. osteocytes b. chondroblasts c. osteoblasts d . chondroclasts Since cartilage is largely avascular, how do cartilaginous cells receive nutrients? Group of answer choices a. from nearby capillaries b. diffusion through the matrix c. from the canaliculi throughout d. from nearby nervous tissuearrow_forwardWhich of the following changes takes place when a skeletal muscle contracts?A. Z discs move farther apart.B. Actin filaments contract.C. Myosin filaments contract.D. Sarcomeres become shorter.arrow_forward
- The walls between cartilage lacunae break down in the zone of:- a. cell proliferation. b. calcification. c. reserve cartilage. d. bone deposition. e. cell hypertrophyarrow_forwardWhen sarcomeres contract during muscle contraction, which of the following occurs? A. The myosin filaments lengthen. B. The myosin filaments "walk" along the actin microfilaments. C. The myosin filaments shorten. D. The actin filaments shorten.arrow_forwardThe sliding filament mechanism describes the process during which: a. actin and myosin slide relative to each other b. sarcomeres slide relative to each other c. troponin and tropomyosin slide relative to each other d. muscle fibers slide past each otherarrow_forward
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