Biology: The Unity and Diversity of Life (MindTap Course List)
15th Edition
ISBN: 9781337408332
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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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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At low intracellular Ca2+ concentration, _________________ the active sites on the thin actin filament.
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Chapter 35 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
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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- In relaxed muscle, the myosin-binding site on actin is blocked by ________. a. titin b. troponin c. myoglobin d. tropomyosinarrow_forwardMuscle 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 reticulumarrow_forwardA sarcomere shortens when______ . a. thick filaments shorten b. thin filaments shorten c. both thick and thin filaments shorten d. none of the abovearrow_forward
- The fluid extracellular matrix of blood is called __________. a. mucus b. serous fluid c. synovial fluid d. plasma.arrow_forwardWhen skeletal muscle fibers are damaged and die, they may be replaced with dense irregular collagenous connective tissue, commonly known as scar tissue. a. How do these two tissue types differ in structure?b. How do they differ in function?c. Predict the impact of such an injury to muscle tissue on the function of a whole skeletal muscle.arrow_forwardAccording to the sliding filament model, binding sites on actin open when ________. a. creatine phosphate levels rise b. ATP levels rise c. acetylcholine levels rise d. calcium ion levels risearrow_forward
- A _________is an injury to muscle due to twisting orstretching.a. sprainb. strainc. sarcomad. myalgiaarrow_forwardThe cells of muscles, myocytes, develop from________.a. myoblastsb. endodermc. fibrocytesd. chondrocytesarrow_forwardThe stratum spinosum or prickly layer contains cells that appear spikey, known as _____________. a. prekeratin filaments b. melanocytes c. keratinocytes d. desmosomes e. keratinarrow_forward
- In sustained, moderate exercise, skeletal muscle is predominantly using ______________ as its energy source. a. amino acids b. glucagon c. fatty acids d. creatine phosphatearrow_forwardStriations, cylindrical cells, and multiple nuclei areobserved in ________.a. skeletal muscle onlyb. cardiac muscle onlyc. smooth muscle onlyd. skeletal and cardiac musclesarrow_forward. Injection of C. botulinum toxin (Botox)______ . a. causes irreversible muscle contraction b. stimulates formation of ATP from ADP c. prevents release of ACh by motor neurons d. blocks the actin binding site of myosinarrow_forward
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