Biology ยท General Awareness

Skeletal and Muscular System

1,098 Questions

The skeletal and muscular system is a core topic in human biology. It covers the structure and function of bones, joints, and muscles. These concepts frequently appear in general science sections of various competitive exams. Master this topic to score higher.

Types of jointsHuman body bonesSkeletal fracturesMuscle anatomy

Skeletal and Muscular System Questions

Multiple choice
  1. Tendons

  2. Ligaments

  3. Capillaries

  4. Cartilage

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Tendons are dense connective tissues that connect skeletal muscles to bones, transmitting muscle forces to produce movement. Ligaments connect bones to other bones, providing joint stability. Capillaries are blood vessels, and cartilage is flexible connective tissue - neither connects muscle to bone.

Multiple choice
  1. Only 1

  2. Only 2

  3. Both 1 and 2

  4. Neither 1 nor 2

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Statement 1 is correct. The human body is supported by a framework of bones, called skeleton. The skeleton consists of 206 bones. Statement 2 is also correct. Cartilages are found between two or more bones. They prevent bones from rubbing against each other.

Multiple choice
  1. Pectineus

  2. Biceps femoris

  3. Adductor magnus

  4. All of the above

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Definition: Composite muscles are those, whose functions are regarded the same in terms of skeletal structure and muscle arrangement condition, as a single muscle model, e.g. vastus intermedius, lateralis and medialis working with rectus femoris on the knee joint for its extension.

Multiple choice
  1. Fibrous joint

  2. Primary cartilaginous

  3. Secondary cartilaginous

  4. Synovial joint

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Synovial joints are called diarthroses with few exceptions (the temporomandibular joint and those involving the clavicles, which have intervening fibrocartilaginous discs). They occur between the ends or other defined surfaces of endochondral bones.

Multiple choice
  1. lateral pterygoid

  2. medial pterygoid

  3. masseter

  4. temporalis

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

When a jaw muscle contracts in the absence of a restraint, the mandible is pulled in the direction of the shortening muscle. The lateral pterygoids are each capable of exerting about 160 N force, a total of 320 N, and yet less than 5% of this is used to protrude or open the jaw.

Multiple choice
  1. proliferation and hypertrophy

  2. calcification and ossification

  3. vasculogenesis and erosion

  4. replacement of red bone marrow with yellow marrow

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

At the epiphyseal growth plate (physes) new bone growth occurs by the process of enchondral ossification, i.e. ossification of proliferating cartilage. This process sequentially involves proliferation and hypertrophy of chondrocytes, their calcification and vascular invasion. Replacement of red bone marrow with the white marrow is not seen.

Multiple choice
  1. synchondroses

  2. syndesmosis

  3. lymphysis

  4. schindylesis

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Cartilaginous joints are themselves classified into synchondroses (primary cartilaginous joints) and symphyses (secondary cartilaginous joints). When fully formed, each group shares common features and also has distinctive structural and functional features. The terms primary and secondary are only useful in the instances of certain symphyses which, developmentally, are preceded by synchondroses within which further differentiation occurs.