support and movement test 4

• When it comes to cellular structures, it is crucial to recognize the distinct components of each cell type.
• Cellulose is primarily found in plant cell walls, while chitin is a major component of fungal cell walls.
• However, the cell wall of a prokaryotic bacterial cell is predominantly composed of a substance called Murein, which is chemically known as Peptidoglycan.
• Peptidoglycan consists of Amino acids (Peptido) and Carbohydrates (Glycan).
• Therefore, the correct answer is C, "Murein".

A suture is a type of joint that is exclusively found in the skull.

This type of joint is characterized by its fibrous nature, which is designed for minimal movement.

Therefore, the correct answer is C, "Fibrous joints".

Synovial fluid is a viscous, non-Newtonian fluid found in the cavities of synovial joints.

It reduces friction between the articular cartilage of synovial joints during movement.

The synovial membrane secretes this fluid, hence the correct answer is D, "Synovial membrane".

The human body consists of different types of muscles that function in specific ways.

Involuntary muscles are ones that we cannot consciously control, and they manage essential bodily functions like the ones mentioned in the question.

Thus, the correct answer is B, "Involuntary".

A sarcomere, the fundamental unit of muscle contraction, is divided into zones and bands.

The H-zone, situated in the center of the sarcomere, is bisected by the M-line.

Therefore, the correct answer is B, "M-line".

Rheumatoid arthritis is an autoimmune disorder that affects various parts of the body, but primarily the joints.

It causes inflammation in the synovial membrane, leading to damage to the cartilage, bone, and joints.

As such, the correct answer is D, "All of them".

Muscle fatigue is a phenomenon where the muscles are unable to generate force due to prolonged activity.

One of the primary reasons for muscle fatigue is the depletion of ATP (Adenosine Triphosphate), which is the main energy source for muscle contractions.

Thus, the correct answer is B, "ATP".

In muscle contraction, myosin (thick) and actin (thin) myofilaments interact with each other.

This union between the myofilaments is sometimes referred to as 'cross bridges'.

Hence the correct answer is A, "Cross bridges".

Different muscles in the human body perform various functions.

Skeletal muscles are primarily involved in locomotion and changes in body posture.

Therefore, the correct answer is A, "Skeletal".

Different cell types within the bone have varying characteristics.

Osteoclasts are unique because they are multinucleated, unlike osteoblasts and osteocytes which are mononucleated.

So, the correct answer is C, "Osteoclasts".

The shoulder joint is a complex structure that involves various parts, each with a specific function.

The Glenoid is the cup-like socket in the shoulder joint that accommodates the head of the humerus.

Therefore, the correct answer is A, "Glenoid".

Living organisms possess diverse types of muscles that perform different functions.

In most organisms, including humans, three types of muscles exist: Cardiac, Skeletal, and Smooth muscles.

Thus, the correct answer is C, "3".

Joints are complex structures where bones meet and movement occurs.

Ligaments are crucial components of joints as they hold the bones together, providing stability and preventing excessive movement.

Hence, the correct answer is B, "Ligament".

In embryonic development, three germ layers form various tissues and organs.

Muscle tissue is a specialized type of tissue that originates from the mesoderm germ layer.

Therefore, the correct answer is B, "Mesoderm".

• Joints are the functional units of the musculoskeletal system, providing mobility and stability.
• The joint between metacarpals and phalanges is a hinge joint, which allows movement in a single plane.
• Hence, the correct answer is C, "Hinge".

• Myofibrils within muscle fibers are composed of proteins that enable muscle contraction.
• The thick filaments are predominantly composed of myosin, while actin primarily forms the thin filaments.
• Therefore, the correct answer is A, "Myosin and actin".

• The composition of the skeletal system is diverse with different tissues playing functional roles.
• The skeletal system is primarily comprised of connective tissue, including bones and other structures such as cartilage, tendons, and ligaments.
• Thus, the correct answer is B, "Connective tissue".

• Muscle fibers contain several contractile units that enable muscle movement.
• The smallest contractile unit in a muscle fiber is the sarcomere, which is responsible for muscle contraction.
• Therefore, the correct answer is D, "Sarcomere".

• Muscle cells, also known as myocytes, differ in structure and function depending on their location.
• Skeletal muscle cells are unique in that they are multinucleated, unlike cardiac and smooth muscle cells which are mononucleated.
• So, the correct answer is B, "Skeletal".

• Joints are classified into several types based on their structure and the type of movement they allow.
• The joint between the sternum and the ribs is a cartilaginous joint, characterized by the presence of cartilage connecting the bones.
• Therefore, the correct answer is A, "Cartilaginous".

• Various types of muscles are spread across the body, each serving a distinct function.
• The bony skeleton is covered and attached primarily by skeletal muscle, facilitating voluntary movements.
• Hence, the correct answer is A, "Skeletal muscle".

• Bone structure and its various components are integral to understanding the skeletal system.
• The site where two or more bones meet can be termed either a joint or an articulation.
• Thus, the correct answer is C, "Both A and B".

• The perichondrium is a type of membrane found within the body.
• This dense layer of fibrous connective tissue does not surround the hard, compact, or spongy bones. Rather, it covers cartilage.
• As a result, the correct response is D, "None of the above".

• Various types of muscles exist in organisms, each serving unique purposes.
• Striated muscles, visceral muscles, and cardiac muscles are all present in organisms.
• Therefore, the correct answer is D, "All of the above".

• Different types of muscles are present in various locations within the body.
• The gut, urinary bladder, and blood vessels are predominantly composed of smooth muscle.
• Consequently, the correct answer is B, "Smooth muscle".