Muscle Contraction and Joint Motions

Front

What is the main function of the Atlantoaxial joint?

Back

Allows for rotational movement around a single axis, such as shaking your head 'no'.

Front

Define plantarflexion.

Back

The movement of the foot that points the toes downward, as in standing on tiptoes.

Front

What is supination in terms of hand movement?

Back

Turning the hand so that the palm is upward or facing anteriorly (in anatomical position).

Front

What are type 2A muscle fibers known for?

Back

High force production.

Front

Which activity is primarily associated with type IIa muscle fibers?

Back

400m sprint.

Front

What is the primary characteristic of type 1 muscle fibers?

Back

Slow twitch, endurance-oriented.

Front

Define dorsiflexion.

Back

The movement of the foot that brings the toes closer to the shin.

Front

What type of joint is the shoulder joint?

Back

Ball-and-socket joint, allowing for multi-directional movement.

Front

What is the role of myoglobin in muscle fibers?

Back

Myoglobin stores oxygen in muscle cells, aiding in aerobic respiration.

Front

What is the difference between flexion and extension?

Back

Flexion decreases the angle between body parts, while extension increases it.