Poorly conditioned, middle-aged peoplemay suffer a rupture of the calcaneal tendonwhen the foot is suddenly dorsiflexed, asin hitting the ground when jumping downfrom a height. Explain each of the followingsigns of a ruptured calcaneal tendon: (a)a prominent lump typically appears in thecalf; (b) the foot can be dorsiflexed fartherthan usual; and (c) the patient cannot plantarflex the foot very effectively

Q: Muscle that has a striped appearance is described asbeing ________.a. elasticb. nonstriatedc.…

A: A muscle is a soft tissue present in the most of the animals. The muscle cells comprise the filament…

Q: When a person dies, the body often experiences rigor mortis. In this condition, it is as if the…

A: Postmortem changes resulting in the stiffeness of the body muscles due to chemical changes in their…

Q: Most skeletal muscles contain which of the following? O fast twitch fibers O slow twitch fibers O…

A: * Skeletal muscle functions in voluntary actions hence called as voluntary muscle. *Skeletal muscles…

Q: As skeletal muscle contracts, one or more bands of the sarcomere become narrower and disappear, and…

A: When the myosin binds to the actin filaments, it forms the cross-bridge that causes a shortening of…

Q: At first, Donnie’s wife accused her once-active 25-year-old husbandof trying to get out of housework…

A: Ankylosing spondylitis is a type of arthritis, inflammation-causing spine, and large joints. Spine…

Q: What is the role of stored creatine phosphate in muscles?

A: The human body consists of various systems that function together to carry out their daily…

Q: Exaggeration of tendon jerks could result from any of the following conditions, except :-a- lesions…

A: A reflex action known as tendon reflex is produced if the tendon located below the knee is tapped.…

Q: What is “Tardive dyskinesia” ?

A: Tardive dyskinesia is characterised by involuntary and abnormal movements of the jaw, lips and…

Q: Repetitive extension of the hand at the wrist and abduction of the hand can lead to lateral…

A: The study of the human body can be divided into anatomy and physiology. The anatomy studies about…

Q: How do calcium ionsparticipate in musclecontraction? Why do bothmuscle contraction andmuscle…

A: Muscle contraction is the process of activating tension generating sites in the muscle fibers.…

Q: Removal of cancerous lymph nodes fromthe neck sometimes requires removal of the sternocleidomastoid…

A: The muscles, which are involved in the movement of the head, are known as the sternocleidomastoid…

Q: . What steps might be taken to minimize atrophy of theskeletal muscles in patients confined to bed…

A: The soft tissue-like structure found in the majority of the animals including human beings is known…

Q: Why do muscle cells use creatine phosphate insteadof glycolysis to supply ATP for the first few…

A: ATP or adenosine triphosphate provides the energy for muscle contraction.For ATP regeneration, three…

Q: Myofibis in muscle fibres are made up of repeating units of dark and light bonds called

A: Myofibril is a muscle cell that is shaped like a rod. Many chains of Myofibril bound together to…

Q: Why do the muscles of facial expression move the skin ratherthan a joint?

A: The origins of the muscles of facial expression are on the surface of the skull i.e. lie within the…

Q: Explain why eating and coughing may be difficultin a person with severe ankylosing spondylitis.

A: Severe ankylosing spondylitis is a sort of persisting arthritis condition that impacts the spinal…

Q: Are all the fibers in a tendon oriented in the same direction? Of what importance is this?

A: Connective tissue is one of the four essential kinds of creature tissue, alongside epithelial…

Q: escribe the sequence of events that occurs from the time the patellar tendon is stretched to the…

A: Muscle is the system that controls the movement of organisms. This is also responsible for…

Q: What is the differencebetween spatial summationand temporal summation ofmuscle fibers? What is…

A: The additive effect of multiple electrical signals on the neuromuscular junctions is described as…

Q: Determine the kind of flexibility exercises thatwould be indicated for a patient with carpal tun-nel…

A: The wrist and the hand are connected by a passage called carpal tunnel which consists of tendons,…

Q: Savannah and her 59-year-old grandfather spent a long daygardening. Pulling weeds, raking, and…

A: However, Savannah’s grandfather was more stiff and sore, and it took him much longer to recover than…

Q: How is an aponeurosis functionally similar to a tendon?

A: The tissue is the group of cells, that have the same function and structure. Different organs…

Q: Why is tetanic tension so much greater than twitch tension?

A: Tetanic contraction is a muscle contraction produced through the high rate action potential…

Q: Muscles that maintain posture are composed primarily of what type of skeletal muscle fibers?

A: Skeletal muscle fibre basically refers to the multiple bundles of the fibres that are joined…

Q: Why is muscle that has sustained significant damageunable to produce the same amount of power as it…

A: The muscle is a type of contractile tissue. It provides contractibility, elasticity, and…

Q: A patient was involved in a rear-end auto collision, resulting in awhiplash injury to the head…

A: Hyperextension of the spine, also known as whiplash, is an injury that happens as a result of rapid…

Q: Describe the sequence of events involved in myosincross-bridge attachment and detachment. Relate…

A: In physiology, myosin is defined as the protein that binds and attach with actin protein on the…

Q: What do you mean by myosin myofilaments?

A: Muscles consist of munerous muscle fibres. Each muscle fibre contains many myofibrils having…

Q: Most of the muscles acting in groups and most of skeletal muscles are arranged in opposing pairs at…

A: Agonist muscle is the muscle which is performing the action and its active contraction produces the…

Q: Sarcomere lies between O two I band O two Z line O M lineand Z line O two M line *

A: Muscular system is a part of body system which is involved in regular contraction as well relaxation…

Q: Which of the following statements about glycolytic fibers is true?

A: There are various types of muscle fibers. Some may be slow oxidative fibers, fast oxidative fibers,…

Q: What is the function of the Cristae?

A: The cells are the basic building blocks of the living system. It consists of many internal…

Q: Scoliodon lacks corporta adiposa. Is it so?

A: Scolidon, commonly called dogfish, belongs to the class of elasmobranchii. They are cold-blooded,…

Q: At what frequency of stimulation did tetanic contraction occur?

A: The muscles are stimulated by the nerve impulses causing the contraction of the muscles. The muscle…

Q: Should my patient, whose arm trembles when eating, use a heavier spoon to dampen some of the…

A: Assistive devices Functional abilities are enhanced with the help of assistive devices. Tremors are…

Q: Why does repeated stimulation of the muscle (at maximum stimulus) before it has completely recovered…

A: Muscle contraction is the phenomenon of decreasing in size or shortening or compacting the muscle…

Q: What will happen to human body if tendons are not present?

A: Tendons are the tough bands made up of fibrous connective tissue and provide a connection between…

Q: What is the function of tendon?

A: A tendon is a fibrous connective tissue. They are made up of collagen and are similar to ligaments.

Q: A skier breaks his ankle. As part of his treatment, the ankle and legare placed in a plaster cast.…

A: A fracture is a breaking of the bone partially or completely. Although the bones are rigid but can…

Q: While the sarcoplasmic reticulum of muscle was first described by nineteenth-century microscopists,…

A: The structure of the sarcoplasmic reticulum is a little different from the normal endoplasmic…

Q: List five proteins of the myofilaments and describe their physical arrangement.

A: In muscle cells, myofilaments are the three protein filaments of myofibrils.

Q: Calcium is released from the sarcoplasmic reticulum following death. Without available ATP, rigor…

A: Muscles are required in breathing, talking, running, walking, and anybody's movement. Actin and…

Q: To increase the strength ofthe muscle work is the musclecontraction intenselyincreased?

A: Muscles are soft tissues present in most of the animals. They contain protein filaments called actin…

Q: The specialized functions associated with the cristae can be attributed to

A: The mitochondria is the double membrane-bound organelle that is found in most eukaryotic cells. It…

Q: The mighty Zimbo claims to have leg muscles so strong that he can stand flat on his feet and lean…

A: Centre of gravity is point where the total weight of the body is assumed to be concentrated. For a…

Muscle Action

A change in the body or a bodily organ as a result of its functioning is referred to as an action. Muscle action can be defined as the specific movement of a bodily part generated by the contraction of a muscle. The muscle proteins actin and myosin are the important contractile proteins involved in muscle action. Muscle contraction, in addition to movement, serves several other important functions in the body, including posture, heat generation, and joint stability. Muscle contraction maintains posture, which includes standing and sitting.