Questions and Answers
Which muscle cells have the greatest ability to regenerate?
The strongest muscle contractions are normally achieved by ________.
Myoglobin ________.
stores oxygen in muscle cells
Immediately following the arrival of the stimulus at a skeletal muscle cell there is a short period called the ________ period during which the events of excitation - contraction coupling occur.
Signup and view all the answers
During muscle contraction, myosin cross bridges attach to which active sites?
Signup and view all the answers
Which of the following surrounds the individual muscle cell?
Signup and view all the answers
The oxygen-binding protein found in muscle cells is ________.
Signup and view all the answers
The contractile units of skeletal muscles are ________.
Signup and view all the answers
When a muscle is unable to respond to stimuli temporarily, it is in which of the following periods?
Signup and view all the answers
In an isotonic contraction, the muscle ________.
Signup and view all the answers
Which of the following is true about smooth muscle contraction?
Signup and view all the answers
Muscle tissue has all of the following properties except ________.
Signup and view all the answers
Which of the following statements is true?
Signup and view all the answers
Muscle tone is ________.
Signup and view all the answers
The sliding filament model of contraction involves ________.
Signup and view all the answers
After nervous stimulation stops, ACh in the synaptic cleft is prevented from continuing stimulation of contraction by ________.
Signup and view all the answers
Study Notes
Muscle Regeneration and Contraction
- Smooth muscle cells have the greatest regenerative ability compared to skeletal and cardiac muscle cells.
- Strongest muscle contractions are achieved by increasing stimulation up to the maximal stimulus.
Muscle Physiology
- Myoglobin is an oxygen-binding protein that stores oxygen in muscle cells, essential for energy production during muscle contractions.
- The latent period follows stimulus arrival, during which excitation-contraction coupling occurs.
Muscle Structure
- Myosin cross bridges attach to active sites on actin filaments during muscle contraction.
- The endomysium surrounds individual muscle cells, while perimysium surrounds fascicles, and epimysium wraps entire muscles.
Contraction Types and Properties
- Isotonic contraction refers to muscle length change while moving a load.
- Muscle tone is defined as a state of sustained partial contraction, important for posture and readiness to act.
Smooth Muscle Characteristics
- Certain smooth muscle cells possess the ability to divide, allowing an increase in cell number.
- Smooth muscle does not have the well-developed T tubules characteristic of skeletal muscle.
Muscle Tissue Properties
- Muscle tissue is defined by properties including contractility, extensibility, and excitability, but does not exhibit secretion.
- Striated muscle cells have numerous nuclei and are long and cylindrical, while cardiac muscle cells are found uniquely in the heart and large blood vessels.
Contraction Dynamics
- The sliding filament model of contraction involves actin and myosin sliding past each other and partially overlapping.
- After nervous stimulation ceases, acetylcholinesterase breaks down ACh in the synaptic cleft to prevent continued contraction stimulation.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Test your knowledge on muscle cells and their properties with this engaging quiz. Explore questions about muscle regeneration, strength of contractions, and various muscle types. A perfect way to enhance your understanding of muscle tissue dynamics.
