Quiz 12

20問 • 1年前

問題一覧

What is the outermost layer of bone that serves as a protective membrane and is involved in the attachment of tendons and ligaments?

Periosteum

Which type of bone cell is responsible for breaking down bone tissue during the process of bone resorption?

Osteoclast

What is the primary function of osteoblasts?

Build and secrete bone matrix

Which region of a long bone contains the growth plate in children and adolescents?

Metaphysis

Which part of the long bone is primarily composed of compact bone?

Diaphysis

What type of bone is characterized by a porous, honeycomb-like structure and is found primarily at the ends of long bones and in the interiors of other bones?

Spongy bone

What type of cells reside in the lacunae of an osteon?

Osteocytes

What is the role of hydroxyapatite in the bone matrix?

It contributes to the hardness and compressive strength of bone

Osteoid refers to:

The unmineralized, organic portion of the bone matrix

What is the primary function of synovial fluid in synovial joints?

To lubricate and cushion the joint, reducing friction during movement

In which type of joint are bones joined by fibrocartilage, providing strength with limited flexibility, such as in the intervertebral discs?

Cartilaginous joint

What is the fundamental contractile unit of a muscle fiber?

Sarcomere

Which protein forms the thin filaments within a muscle fiber?

Actin

What is the role of the sarcoplasmic reticulum in muscle fibers?

Storing and releasing calcium ions

What structure transmits the electrical impulse deep into the muscle fiber?

T-tubule

During muscle contraction, what happens to the sarcomere?

The I band decreases in size

Which protein acts as the regulatory protein associated with the thin filament that blocks the myosin-binding sites on actin in a relaxed muscle?

Tropomyosin

What role does myosin play in muscle contraction?

It forms cross-bridges with actin to generate force

During muscle contraction, which ion binds to troponin to facilitate the exposure of myosin-binding sites on actin?

Calcium (Ca2+)

Which molecule must bind to myosin to allow it to detach from actin after a power stroke?

ATP

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Quiz 13

問題一覧

What is the outermost layer of bone that serves as a protective membrane and is involved in the attachment of tendons and ligaments?

Periosteum

Which type of bone cell is responsible for breaking down bone tissue during the process of bone resorption?

Osteoclast

What is the primary function of osteoblasts?

Build and secrete bone matrix

Which region of a long bone contains the growth plate in children and adolescents?

Metaphysis

Which part of the long bone is primarily composed of compact bone?

Diaphysis

What type of bone is characterized by a porous, honeycomb-like structure and is found primarily at the ends of long bones and in the interiors of other bones?

Spongy bone

What type of cells reside in the lacunae of an osteon?

Osteocytes

What is the role of hydroxyapatite in the bone matrix?

It contributes to the hardness and compressive strength of bone

Osteoid refers to:

The unmineralized, organic portion of the bone matrix

What is the primary function of synovial fluid in synovial joints?

To lubricate and cushion the joint, reducing friction during movement

In which type of joint are bones joined by fibrocartilage, providing strength with limited flexibility, such as in the intervertebral discs?

Cartilaginous joint

What is the fundamental contractile unit of a muscle fiber?

Sarcomere

Which protein forms the thin filaments within a muscle fiber?

Actin

What is the role of the sarcoplasmic reticulum in muscle fibers?

Storing and releasing calcium ions

What structure transmits the electrical impulse deep into the muscle fiber?

T-tubule

During muscle contraction, what happens to the sarcomere?

The I band decreases in size

Which protein acts as the regulatory protein associated with the thin filament that blocks the myosin-binding sites on actin in a relaxed muscle?

Tropomyosin

What role does myosin play in muscle contraction?

It forms cross-bridges with actin to generate force

During muscle contraction, which ion binds to troponin to facilitate the exposure of myosin-binding sites on actin?

Calcium (Ca2+)

Which molecule must bind to myosin to allow it to detach from actin after a power stroke?

ATP