MOVEMENT COMPETENCY QUIZ 1 Flashcards
consists of all the muscles of the body. These make up approximately _% of total body weight, and The fibers are different lengths and vary in color from white to deep red.
muscular system, 42
contains more than _ muscles that work together to enable the full functioning of the body.
muscular system, 600
body has 3 types of muscle tissue that perform different functions:
Cardiac muscle cell
skeletal muscle cell
smooth muscle cell
is involuntary muscle that is found only in the heart.
Cardiac muscle
____ or ____ are striated like skeletal muscles, but are smaller and shorter.
Cardiac muscle, myocardium
They are stimulated to contract by electrical impulses sent out from small clumps of specialized tissue in the heart
Cardiac muscle
move the external parts of the body and the limbs. They cover the bones and give the body its shape.
Skeletal muscles
only pull in one direction, they work in pairs. When one muscle in the pair contracts, the other expands, and this facilitates movement.
skeletal muscles
Provides movement of internal organs.
smooth muscles
Smooth muscle lines most hollow organs of the body, such as the __
intestines, stomach, and uterus.
They help move substances through tubular areas such as blood vessels and the small intestines, contracting automatically and rhythmically.
smooth muscles
Smooth muscle, also called __, is a muscle that shows no cross stripes under microscopic magnification.
involuntary muscle
It consists of narrow spindle-shaped cells with a single, centrally located nucleus.
smooth muscle tissue
A prominent muscle in the upper arm with two heads (short and long). It primarily functions to flex the elbow and supinate the forearm, enabling actions like lifting and turning the palm upward.
Biceps Brachii
A long, flat muscle that extends vertically along the front of the abdomen. It is crucial for flexing the spine, maintaining posture, and stabilizing the pelvis, often referred to as the “abs.”
Rectus Abdominis
The longest muscle in the human body, it runs diagonally from the hip to the knee. It assists in flexing, abducting, and laterally rotating the thigh at the hip, as well as flexing the knee.
Sartorius
Located in the front compartment of the lower leg, this muscle is responsible for dorsiflexion (lifting the foot upward) and inversion (turning the sole of the foot inward) at the ankle joint.
Tibialis Anterior
A flat, broad muscle located beneath the gastrocnemius in the calf. It primarily aids in plantarflexion (pointing the toes) at the ankle, especially during activities like walking and running.
Soleus
This muscle runs from the sternum and clavicle to the mastoid process of the temporal bone. It allows for rotation and flexion of the head and neck, helping with movements like turning the head side to side.
Sternocleidomastoid (Mastoid)
A thick, fan-shaped muscle in the chest that facilitates shoulder flexion, adduction, and medial rotation of the arm. It plays a key role in movements like pushing and lifting
Pectoralis Major
These muscles are located on the sides of the abdomen. They help in trunk rotation, lateral flexion, and stabilization of the core, contributing to movements like twisting and bending at the waist.
Obliques (External and Internal):
One of the four quadriceps muscles, it runs down the front of the thigh. It functions to extend the knee and flex the hip, playing a critical role in activities such as running and jumping.
Rectus Femoris