L1

Question 1

consists of all the muscles of the body.

Answer 1

Mascular system

Question 2

Muscles (mascular system) make up approximately __% of total body weight

Answer 2

42%

Question 3

muscles are consists of long, slender cells known as

Answer 3

fibers

Question 4

fibers are different ________ and vary in color from _______________

Answer 4

lengths

white to deep red

Question 5

three types of muscle tissue that perform different functions.

Answer 5

cardiac muscles
skeletal muscles
smooth muscles

Question 6

involuntary muscle that is found only in the heart.

Answer 6

cardiac muscles

Question 7

cardiac muscles are also known as

Answer 7

myocardium

Question 8

cardiac muscles are striated like _________, but are smaller and shorter.

Answer 8

skeletal muscles

Question 9

cardiac m. are stimulated to contract by electrical impulses sent out from small clumps of specialized tissue in the heart:

Answer 9

Sinoatrial
Atrioventricular Node

Question 10

move the external parts of the body and the limbs.

Answer 10

skeletal muscles

Question 11

They cover the bones and give the body its shape.

Answer 11

skeletal muscles

Question 12

As skeletal muscles only pull in _?
they work in _?.

When one muscle in the pair contracts, the other expands, and this facilitates movement.

Answer 12

one direction

pairs

Question 13

Provides movement of internal organs.

Answer 13

Smooth muscles

Question 14

Smooth muscle lines most hollow organs of the body, such as the:

Answer 14

intestines, stomach, and uterus

Question 15

They help move substances through tubular areas such as blood vessels and the small intestines, contracting automatically and rhythmically.

Answer 15

smooth muscles

Question 16

Smooth muscle, also called ____, is a muscle that shows no cross stripes under microscopic magnification.

Answer 16

involuntary muscle

Question 17

It consists of narrow spindle-shaped cells with a single, centrally located nucleus.

and unlike striated muscle, contracts slowly and automatically.

Answer 17

Smooth muscle

Question 18

MAJOR MUSCLES OF ANTERIOR

Answer 18

Biceps Brachii
Rectus Abdominis
Sartorius
Tibialis Anterior
Soleus
Sternocleidomastoid (Mastoid)
Pectoralis Major
Obliques (External and Internal)
Rectus Femoris
Gastrocnemius

Question 19

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.

Answer 19

Biceps Brachii

Question 20

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.”

Answer 20

Rectus Abdominis

Question 21

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.

Answer 21

Sartorius

Question 22

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.

Answer 22

Tibialis Anterior

Question 23

lifting the foot upward

Answer 23

dorsiflexion

Question 24

turning the sole of the foot inward

Answer 24

inversion

Question 25

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.

Answer 25

Soleus

Question 26

pointing the toes

Answer 26

plantarflexion

Question 27

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.

Answer 27

Sternocleidomastoid (Mastoid)

Question 28

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.

Answer 28

Pectoralis Major

Question 29

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.

Answer 29

Obliques (External and Internal)

Question 30

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.

Answer 30

Rectus Femoris

Question 31

The larger of the two calf muscles, it has two heads and contributes to plantarflexion of the foot at the ankle. It also aids in flexing the knee, making it important for jumping and running

Answer 31

Gastrocnemius

Question 32

MAJOR MUSCLES OF POSTERIOR:

Answer 32

Latissimus Dorsi Gluteus Medius Gluteus Maximus Gastrocnemius Trapezius Deltoid Triceps Brachii Hamstrings Achilles Tendon

Question 33

A large, flat muscle covering the lower back. It plays a key role in extending, adducting, and medially rotating the arm, contributing to movements like pulling and lifting.

Answer 33

Latissimus Dorsi

Question 34

Located on the outer surface of the pelvis, this muscle primarily functions to abduct the hip and stabilize the pelvis during walking or running, preventing hip drop on the opposite side.

Answer 34

Gluteus Medius

Question 35

The largest muscle in the gluteal region, it is responsible for hip extension, external rotation, and abduction. It plays a significant role in powerful movements like climbing, running, and jumping.

Answer 35

Gluteus Maximus

Question 36

A prominent calf muscle with two heads that assists in plantarflexion of the foot at the ankle and flexion of the knee. It is crucial for movements such as jumping and running.

Answer 36

Gastrocnemius

Question 37

A large, triangular muscle extending from the back of the neck down the spine and across the shoulder. It helps in moving, rotating, and stabilizing the shoulder blade, as well as extending the neck.

Answer 37

Trapezius

Question 38

A rounded shoulder muscle consisting of three distinct fibers (anterior, lateral, and posterior). It is responsible for arm abduction, flexion, and extension, playing a key role in shoulder movements.

Answer 38

Deltoid

Question 39

A three-headed muscle located on the back of the upper arm. It is the primary extensor of the elbow, responsible for straightening the arm.

Answer 39

Triceps Brachii

Question 40

A group of three muscles (biceps femoris, semitendinosus, and semimembranosus) located at the back of the thigh. They are involved in knee flexion and hip extension, playing a vital role in activities like running and jumping.

Answer 40

Hamstrings

Question 41

The thick band of tissue connecting the calf muscles (gastrocnemius and soleus) to the heel bone (calcaneus). It is essential for walking, running, and jumping by allowing plantarflexion of the foot.

Answer 41

Achilles Tendon

Question 42

gastrocnemius and soleus

Answer 42

calf muscles

Question 43

calcaneus

Answer 43

heel bone