If a muscle is contracted and shortening, what happens to the following: (a) width of the A band, (b) width of the H zone, (c) relationship of the Z discs, and (d) width of the I band?

Q: What prevents cross-bridges from attaching to sites on the thinfilaments in a resting skeletal…

A: Muscles are the tissues able to contract in response to stimuli.

Q: Muscles that are immobilized for long periods of time, as with a cast, frequently get smaller. Why?…

A: The reduction in muscle mass due to temporary immobilization is called muscle atrophy. It may be…

Q: Match Column I with Column II :Column I                             Column II(a) Smooth muscle…

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

Q: What are the difference between red and white muscle?

A: Muscle is a soft tissue found in most animals. Muscle cells contain protein filaments of myosin and…

Q: Without ATP, relaxed muscle cannot contract and a contracted muscle cannot relax. Explain why.

A: The actin and myosin filaments are linked with several types of cell movements. The myosin converts…

Q: What is isovolumetric contraction?

A: IT IS THE CONTRACTION IN WHICH THE VENTRICLES CONTRACT AND THE VOLUME OF THE VENTRICLE REMAINS…

Q: Give one example of a muscle that is responsible for the movement of the following:   a.) Upper arm…

A: Muscles are examples of soft tissues. Your muscles are made up of several flexible fibres. Your body…

Q: How many muscles are there in the human body?

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

Q: What is the trigone muscle?

A: Trigone : It is the neck of the bladder. Trigone muscle : It is a smooth triangular region of the…

Q: Name the major parts of a muscle fiber

A: Muscle is a soft tissue found in animals and humans. It is composed of actin and myosin protein…

Q: Name the types of muscle contraction and briefly explain each.

A: The muscular system comprises of skeletal muscles, smooth muscles and tendons. This system plays an…

Q: which arrangement best describes bipennate muscle?

A: Pennate ( feathers ) muscle are the one's that can hold muscle fibers within them , produce more…

Q: Describe three contrasting actions of the deltoid muscle.

A: DELTOID MUSCLE The deltoid is a thick, triangular shoulder muscle. It receives its call due to its…

Q: Differentiate between single unit muscles and multi unit muscles.

A: Smooth muscle is a kind of muscle tissue that is used to apply pressure to the organs and vessels.…

Q: Explain the Microscopic Anatomy of a Muscle ?

A: Microscopic anatomy can be defined as the study of the simple structure of the organism by viewing…

Q: Define muscle tone.

A: Muscle tone is defined as a tension in muscle when at rest.  It's a muscle response to the outside…

Q: On a warm day, would the cremaster muscle be contracted or relaxed? Why?

A: Gonads are the reproductive organs that produce gametes and hormones responsible for conducting…

Q: explain how fasciculus orientation determines muscleshape and list examples of muscles that…

A: A fasciculus refers to a group of skeletal muscle cells which are arranged or bundled together such…

Q: What is the name of the muscle indicated by the arrow, and what is its action?

A: There are three important muscles in the anterior thigh: Pectineus Sartorius Quadriceps femoris

Q: In my study guide, I have been going through notes and I am unsure of the topic on muscle…

A: Joints are the point of contact between two bones or a bone and a cartilage or between bones and…

Q: What geometric shapes can muscles have?

A: Muscles are tissues of the skeletal systems and can be classified into three types of muscles are…

Q: Define striated muscles.

A: Muscle is defined as the soft tissue found in animals and humans. There are 3 types of muscles such…

Q: Many smooth muscles can be placed into one of two groups. What are they? Explain with examples?

A: Smooth muscles are the muscles present in different regions of the body. They exhibit the following…

Q: Distinguish between single-unit and multiunit smooth muscles.

A: Involuntary muscles are known as smooth muscles, on their own they carry out the process of…

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 can you lift a larger load when your elbow is slightly flexed and your biceps muscle is at an…

A: The muscles relax and contract the body parts of the human body to cause the movements. The effect…

Q: Identify two axial muscles named for their region?

A: Effectors are tissues and organs commanded by the CNS to carry out responses, most of which involve…

Q: suppose your friend had a condition where each muscle had only one motor unit controlling it. how…

A: Introduction A neuron along with muscle fibre form a motor unit. It senses the signal from the brain…

Q: How are muscles formed? Explain.

A: Muscles are formed by the process known as myogenesis , in this process mycocytes I e.,  tubular…

Q: What are the main types of muscle?

A: Muscles are the proteinaceous smooth tissues present in the animal bodies. They are mainly made up…

Q: How can the body regulate how much force the muscle should generate?

A: The force  a  muscle generates is dependent on the length of the muscle and its shortening velocity.…

Q: Does the H zone length change when a muscle contracts? Explain.

A: A muscle cell contracts and the the sarcomere shortens . However, the thick and thin filament of…

Q: Describe the differences between white muscle and red muscle.

A: The protein myoglobin stores oxygen in muscle cells, which use oxygen to extract the energy needed…

Q: nat is the name of the muscle indicated by the arrow, and what is its insert to

A: In the back muscles we can find: Lattisimus dorsi Trapezius Levator scapulae Rhomboids

Q: Name the muscle functions.

A: Muscle is a soft tissue found in animals and humans. It is composed of actin and myosin protein…

Q: What is the name of the muscle indicated by the arrow, and what is its insertion?

A: Muscle is a soft tissue found in most animals. Muscle cells contain protein filaments of actin and…

Q: structural and functional differences between slow and fast muscle

A: "Muscle cells" are also known as "myocytes". These are the "cells" that made up the muscle tissue. A…

Q: What are various types of muscles in human body?

A: answer given below

Q: ID muscle at the yellow arrowh B. ID the muscle at the green arro

A: Rectus sartorius muscles of the leg and  serve as both a hip and knee flexor.

Q: Why do some people lack a palmaris longus muscle?

A: The palmaris longus is a muscle visible as a small tendon located between the flexor carpi radialis…

Q: Which of the following has the thickest layer of muscle? *

A: Answer: BLOOD VESSELS : These are the tubes or vessels in the body which are used to transport the…

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.