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
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Question
Chapter 35, Problem 11SQ
Summary Introduction
Introduction: The functioning of the muscles weakens when there is a disturbance in the signaling of the motor neurons. When an action potential reaches the neuromuscular junction, it causes the release of the acetylcholine (ACh).
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
At low intracellular Ca2+ concentration, _________________ the active sites on the thin actin filament.
a. troponin blocks
b. troponin exposes
c. tropomyosin blocks
d. tropomyosin exposes
e. a and c
burst of Calchu
musc
res an
ldum
Which of the following is true concerning the role of Calcium in the contraction of muscle-
cells?
20.
A. skeletal muscle cells require a burst of calcium from the sarcoplasmic reticulum.
B. smooth muscle cells require a burst of calcium from the sarcoplasmic reticulum.
C. cardiac muscle cells require a burst of calcium from the sarcoplasmic reticulum.
D. All of the above are correct.
to an
ent.
response to an ertraceil
m-current
Unlike skeletal muscle cells, cardiac muscle cells________."
A
do not use the sliding filament mechanism of contraction
B
are not striated
C
do not rely on an influx of Ca+2 for contraction to occur
D
do not require neural stimulation to contract
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...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Muscle fibers that have a high number of mitochondria, contain largeamounts of myoglobin, and exhibit low rates of ATP hydrolysis arecalled __________ fibers.a. slow-glycolyticb. fast-glycolyticc. intermediated. fast-oxidativee. slow-oxidativearrow_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_forwardWhich of the following statements relating to smooth muscle is true? a. single-unit smooth muscles contract rhythmically due to gap junctions b. multi-unit smooth muscles are arranged like skeletal muscle motor units c. visceral smooth muscles exhibit spontaneous action potentials d. multi-unit smooth muscles exhibit graded contractions in response to neural stimuli e. all of the abovearrow_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_forwardDuring muscle contraction, calicum ions bind to A. Actin Filaments B. Tropomyosin C. Troponin D. Myosin Filamentsarrow_forwardCompared to fast twitch muscle fibers, slow-twitch fibers _____. A are able to produce much greater force during contractions B "have more myoglobin, more mitochondria, and greater endurance" C "are lighter in color, wider in diameter, and receive less blood flow" D cannot maintain contractions as long because they have fewer mitochondriaarrow_forward
- D2arrow_forward1. During skeletal muscle contraction, what event directly precedes the release of actin by myosin? a. ATP binding b. ATP hydrolysis c. Power stroke d. Release of ADP e. Release of Pi 2. What is the trigger for CICR in skeletal muscle cells? a. Acetylcholine binding b. Activation of nicotinic receptors c. Ca++ entering the cells via VOC channels d. Ca++ release by the sarcoplasmic reticulum e. Movement of troponin out of the groove of actin For questions 12-14, please choose the best answer from the following list. Each answer may be used once, more than once or not at all. Each question has only one best answer. a. Muscle spindle apparatus b. Sarcolemma c. Sarcoplasmic reticulum d. Terminal cisternae e. T-Tubules 3. Primary site of intracellular Ca++ release 4. Maintain optimal overlap of actin and myosin in a resting skeletal muscle cell 5. Aids membrane depolarization along the entire length of the muscle fiber 6. Ion movement responsible for depolarization of the sarcolemma a.…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
- Match the ATP duty of myosin to its description ATP binding ATP hydrolysis Pi release ADP release A. myosin releases actin, cross-bridge dissociation, step in cycle that is interrupted at death, the molecular basis of rigor mortis B. conformation change causing power stroke C. cocking of the motor domain, high-energy conformation D. binding of myosin to actin, improved by drug which led to increased cardiac outputarrow_forwardThe cell in the center of the electron micrograph above is important in wound healing and plays a role in the pathological process underlying Dupuytren's contracture. Which of the following cell types is depicted? A. Endothelial cell B. Myoepithelial cell C. Myofibroblast D. Pericyte E. Smooth muscle cellarrow_forwardPart B Matching Choose the appropriate words or phrases from column "B" that match the terms in column "A." Words or phrases in column "B" may only be used once. Column B Column A 13. Elasticity A. Every one fires B. Binds muscle fibres together 14. Neuromuscular junction C. Muscle's ability to stretch 15. Myosin D. Attaches to troponin 16. Perimysium E. Has a "head and tail" 17. Neurotransmitter Sarcolemma F. Acetylcholine 18. G. muscle membrane 19. Calcium H. Where nerve contacts muscle 20. All-or-none-principlearrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
GCSE PE - ANTAGONISTIC MUSCLE ACTION - Anatomy and Physiology (Skeletal and Muscular System - 1.5); Author: igpe_complete;https://www.youtube.com/watch?v=6hm_9jQRoO4;License: Standard Youtube License