SEHS Topic 1.2

Question 1

What is Contractility in Muscle Tissue?

Answer 1

Ability for the muscle to shorten

Question 2

What is Extensibility in Muscle Tissue?

Answer 2

Ability for the muscle to lengthen

Question 3

What is Elasticity in Muscle Tissue?

Answer 3

Ability for the muscle to return to normal size

Question 4

What is Atrophy in Muscle Tissue?

Answer 4

The decrease in the size of muscle tissue

Question 5

What is Hypertrophy in Muscle Tissue?

Answer 5

The increase in the size of muscle tissue, Controlled by nerve stimuli Fed by capillaries

Question 6

How are the 3 types of Muscles?

Answer 6

Skeletal, Cardiac (Heart Muscle), Smooth

Question 7

What are the traits for Skeletal Muscles?

Answer 7

Voluntary control, Striated, Attached to bone & connective tissues

Question 8

What are the traits for Cardiac Muscles?

Answer 8

Involuntary control, Has “branches” and is striated, Located in the heart

Question 9

What are the traits for Smooth Muscles?

Answer 9

Involuntary control, Tapered at each end, not striated, Located in hollow organs such as large intestine

Question 10

What is Epimysium in the structure of Skeletal Muscle?

Answer 10

Connective tissue capsule

Question 11

What is Perimysium in the structure of Skeletal Muscle?

Answer 11

A branching connective tissue within the muscle tissue

Question 12

What is Endomysium in the structure of Skeletal Muscle?

Answer 12

The muscle cells themselves are individually wrapped by endomysium

Question 13

What is Muscle Fibre in the structure of Skeletal Muscle?

Answer 13

Muscle fibers are elongated cells, multinucleated and packed with myofibrils. They are responsible for the muscle’s ability to contract.

Question 14

What is Myofibril in the structure of Skeletal Muscle?

Answer 14

The muscle cells are filled with cylindrical structures called myofibrils

Question 15

What is Sarcomere in the structure of Skeletal Muscle?

Answer 15

The fundamental contractile unit of a muscle fiber. Structured in a series of thick (myosin) and thin (actin) filaments, their interaction is the basis for muscle contraction.

Question 16

What is Actin in the structure of Skeletal Muscle?

Answer 16

These are thin, helical filaments anchored to the Z-discs at each end of the sarcomere. They provide binding sites for myosin during muscle contraction.

Question 17

What is Myosin in the structure of Skeletal Muscle?

Answer 17

Thick filaments made of myosin molecules with protruding heads. These heads bind to actin filaments, facilitating muscle contraction through their power stroke movement.

Question 18

What is Origin in the context of muscles?

Answer 18

The attachment of a muscle tendon to a stationary bone

Question 19

What is Insertion in the context of muscles?

Answer 19

The attachment of a muscle tendon to a moveable bone

Question 20

What is Anterior (Anatomical Terminology)?

Answer 20

The front or direction toward the front of the body. e.g. The toes are anterior to the foot.

Question 21

What is Posterior (Anatomical Terminology)?

Answer 21

The back or direction toward the back of the body. e.g. The popliteus is posterior to the patella.