#1
Which of the following is not a function of the skeletal system?
Blood circulation
ExplanationSkeletal system provides support, protection, and assists in movement, but not directly involved in blood circulation.
#2
Which type of muscle tissue is voluntary and striated?
Skeletal muscle
ExplanationSkeletal muscles are under voluntary control and exhibit a striped or striated appearance.
#3
Which bone is the longest bone in the human body?
Femur
ExplanationThe femur, or thigh bone, is the longest and strongest bone in the human body, supporting body weight during movement.
#4
Which muscle is responsible for the movement of the arm?
Biceps brachii
ExplanationThe biceps brachii muscle is primarily responsible for flexing the forearm and rotating the arm.
#5
What is the anatomical term for the collarbone?
Clavicle
ExplanationThe clavicle, or collarbone, connects the sternum to the scapula and provides structural support to the shoulder.
#6
Which muscle is responsible for breathing?
Diaphragm
ExplanationThe diaphragm is the primary muscle involved in the breathing process, contracting and relaxing to facilitate inhalation and exhalation.
#7
What is the outermost layer of the skin called?
Epidermis
ExplanationThe epidermis forms the outermost layer of the skin, providing protection and serving as a barrier against pathogens.
#8
Which bone is not part of the axial skeleton?
Scapula
ExplanationThe axial skeleton consists of the skull, vertebral column, and rib cage; the scapula is part of the appendicular skeleton.
#9
What is the medical term for the kneecap?
Patella
ExplanationThe patella is the small bone that covers and protects the front of the knee joint.
#10
Which layer of the skin contains blood vessels, nerve endings, and sweat glands?
Dermis
ExplanationThe dermis contains blood vessels, nerve endings, sweat glands, and hair follicles, providing support and nutrition to the skin.
#11
Which bone forms the forehead and part of the eye sockets?
Frontal bone
ExplanationThe frontal bone forms the forehead and contributes to the structure of the eye sockets (or orbits).
#12
Which layer of the skin contains fat cells and serves as insulation?
Subcutaneous layer
ExplanationThe subcutaneous layer, also known as the hypodermis, contains fat cells that insulate the body and provide cushioning.
#13
Which type of muscle fibers are primarily responsible for endurance activities?
Type I fibers
ExplanationType I fibers, also known as slow-twitch fibers, are more fatigue-resistant and are suited for endurance activities.
#14
Which type of muscle contraction involves the muscle lengthening while producing tension?
Eccentric contraction
ExplanationEccentric contraction occurs when the muscle lengthens while under tension, such as during the lowering phase of a bicep curl.
#15
Which muscle is known as the 'powerhouse' of the cell?
Mitochondria
ExplanationMitochondria are organelles responsible for generating the majority of a cell's energy in the form of adenosine triphosphate (ATP).
#16
Which muscle type is characterized by involuntary, non-striated fibers?
Smooth muscle
ExplanationSmooth muscle is found in various organs and structures, exhibiting involuntary control and lacking striations.
#17
Which muscle is responsible for abducting the arm?
Deltoid
ExplanationThe deltoid muscle, located in the shoulder region, is primarily responsible for abducting the arm away from the body.