Chapter 7: Problem 44
Which of the following is a typical skeletal muscle? (a) Biceps (b) Triceps (c) Both (a) and (b) (d) None of these
Short Answer
Expert verified
(c) Both (a) and (b)
Step by step solution
01
Understand what skeletal muscle is
A skeletal muscle is a muscle that is connected at either or both extremities with a bone. Skeletal muscles are responsible for moving parts of the body closer to the bone that the muscle is attached to.
02
Determine if biceps is a skeletal muscle
The biceps (biceps brachii) is a large muscle that lies on the front of the upper arm between the shoulder and the elbow. It is connected to the bone, so it is a skeletal muscle.
03
Determine if triceps is a skeletal muscle
The triceps brachii is a large, three-headed muscle located on the back of the upper arm. Similar to the biceps, it is also connected to the bone, making it a skeletal muscle.
04
Compare findings with the provided options
Given that both biceps and triceps are skeletal muscles, the correct answer is (c) Both (a) and (b)
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Key Concepts
These are the key concepts you need to understand to accurately answer the question.
Muscle Anatomy
Understanding muscle anatomy is essential for comprehending how muscles function. The skeletal muscle system is comprised of individual muscle units known as muscle fibers, which are multi-nucleated and wrapped in a connective tissue sheath. These fibers are further grouped into bundles called fascicles, surrounded by their own protective layer, contributing to the overall muscle structure.
Each muscle is attached to bones by tendons, which transmit the force generated by contracting muscle fibers, leading to movement. The human body has over 600 skeletal muscles, each with unique shapes and sizes, designed to perform various movements. Key examples, such as the biceps and triceps, exhibit the typical structure featuring origins (where they attach to a stationary bone) and insertions (where they attach to a moving bone).
These muscles also contain blood vessels and nerves essential for supplying oxygen, nutrients, and the electrical signals required for muscle contraction. This sophisticated anatomy enables precise control and forceful movements necessary for everyday activities.
Each muscle is attached to bones by tendons, which transmit the force generated by contracting muscle fibers, leading to movement. The human body has over 600 skeletal muscles, each with unique shapes and sizes, designed to perform various movements. Key examples, such as the biceps and triceps, exhibit the typical structure featuring origins (where they attach to a stationary bone) and insertions (where they attach to a moving bone).
These muscles also contain blood vessels and nerves essential for supplying oxygen, nutrients, and the electrical signals required for muscle contraction. This sophisticated anatomy enables precise control and forceful movements necessary for everyday activities.
Muscle Physiology
The physiology of skeletal muscles involves understanding how these muscles contract to facilitate movement. Muscle contraction is a complex process initiated by an electrical impulse from the nervous system. This impulse causes the release of calcium ions within the muscle fibers, leading to a series of events that result in the sliding of protein filaments, myosin and actin, past each other.
This interaction is known as the sliding filament theory, the fundamental mechanism behind muscle contraction. ATP, a molecule that stores and transfers energy within cells, is vital for both the contraction and relaxation of muscle fibers. The level of muscle contraction can be fine-tuned by the nervous system, which activates a varying number of motor units (groups of muscle fibers and their nerve supply) to match the required force for specific tasks.
Skeletal muscles are also classified based on their functionality, such as the biceps, which are primarily responsible for flexion at the elbow, and the triceps, which facilitate extension. Understanding the physiology of these muscles is crucial for comprehending how exercises and daily activities impact our bodies.
This interaction is known as the sliding filament theory, the fundamental mechanism behind muscle contraction. ATP, a molecule that stores and transfers energy within cells, is vital for both the contraction and relaxation of muscle fibers. The level of muscle contraction can be fine-tuned by the nervous system, which activates a varying number of motor units (groups of muscle fibers and their nerve supply) to match the required force for specific tasks.
Skeletal muscles are also classified based on their functionality, such as the biceps, which are primarily responsible for flexion at the elbow, and the triceps, which facilitate extension. Understanding the physiology of these muscles is crucial for comprehending how exercises and daily activities impact our bodies.
NEET Biology Preparation
Preparing for NEET Biology involves a comprehensive understanding of human anatomy and physiology, including the skeletal muscle system. To excel in this subject, it's important to master fundamental concepts and their applications. Candidates preparing for NEET should focus on clarifying basic terms, such as the distinctions between various types of muscles and the mechanisms of muscle contraction.
Key strategies include studying from approved textbooks, utilizing diagrams to learn muscle anatomy, and engaging in question-solving practice to apply learned concepts. Regular revisions, timed mock tests, and self-assessment are also crucial. Many students find using mnemonic devices to remember muscle names and functions immensely helpful. It's equally important to stay updated on NEET examination patterns and to work on previous year's question papers for a thorough preparation. Engrossing in-depth learning combined with consistent practice fortifies a student's ability to tackle challenging questions related to skeletal muscles and other biology topics in the NEET examination.
Key strategies include studying from approved textbooks, utilizing diagrams to learn muscle anatomy, and engaging in question-solving practice to apply learned concepts. Regular revisions, timed mock tests, and self-assessment are also crucial. Many students find using mnemonic devices to remember muscle names and functions immensely helpful. It's equally important to stay updated on NEET examination patterns and to work on previous year's question papers for a thorough preparation. Engrossing in-depth learning combined with consistent practice fortifies a student's ability to tackle challenging questions related to skeletal muscles and other biology topics in the NEET examination.
