Biology · General Awareness

Skeletal and Muscular System

1,141 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

Mr. Khanna met with a road accident. After examining his X ray, the doctor told him that the bones containing the bony sinuses have been fractured. Which among the following bones, the doctor must be referring to?

  1. Long bones

  2. Short bones

  3. Flat bones

  4. Sesamoid bones

  5. Irregular bones
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Irregular bones are irregular and complicated. Often this irregular shape is due to their many centers of ossification or because they contain bony sinuses. The bones of the spine, pelvis and some bones of the skull are irregular bones. Examples include the ethmoid and sphenoid bones. 

Multiple choice

There are several principle differences between human male and female pelvis. Which among the following differences regarding the human male and female pelvis is false?

  1. The female pelvis is larger while the male pelvis is taller.

  2. The female inlet is more heart in shape, while the male inlet is more oval shaped.

  3. The greater sciatic notch is wider in females than females.

  4. The iliac crests are higher and more pronounced in males than females.

  5. The male sacrum is long and narrow, while the female sacrum is shorter and wider.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The female inlet is larger and oval in shape, while the male sacral promontory projects further (i.e. the male inlet is more heart-shaped).

Multiple choice

The reciprocally concave-convex surfaces are the characteristic feature of ________.

  1. gliding joint

  2. hinge joint

  3. pivot joints

  4. saddle joint

  5. ball and socket joint
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In a saddle joint, the opposing surfaces are reciprocally concave-convex. The best example of saddle joints are first carpo metacarpal joints (Articulationes carpometacarpeae), joints between femur and patella and the calcaneocuboid joints.

Multiple choice

The conversion of cartilage into bone occurs in the five zones. In which of the following zones, the chondrocytes die?

  1. Zone of reserve cartilage

  2. Zone of cell proliferation

  3. Zone of cell hypertrophy

  4. Zone of calcification

  5. Zone of bone deposition
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Within each column, the walls between the lacunae break down and the chondrocytes die. This converts each column into a longitudinal channel, which is immediately invaded by blood vessels and marrow from the marrow cavity. Osteoblasts line up along the walls of these channels and begin depositing concentric lamellae of matrix, while osteoclasts dissolve the temporarily calcified cartilage.

Multiple choice

Five ligaments are supposed to be most important in stabilizing the thumb. The ligament responsible for abduction, extension, and pronation of the thumb is _______.

  1. anterior oblique ligament

  2. ulnar collateral ligament

  3. first intermetacarpal ligament

  4. dorsoradial ligament

  5. Posterior oblique ligment
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

An extracapsular ligament has its origin on the flexor retinaculum and is inserted on the ulnopalmar tubercle of the first metacarpal. It is taut in abduction, extension and pronation and often found elongated in connection to CMC joint arthritis. 

Multiple choice

A fibrocartilage articular disc is associated with which of the following joints?

  1. Glenohumeral joint

  2. Acromioclavicular joint

  3. Sternoclavicular joint

  4. Midcarpal joint

  5. Carpometacarpal joints
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The sternoclavicular articulation is a synovial double-plane joint. It is composed of two portions separated by an articular disc which is made from fibrocartilage. This disk also allows motion between the sternum (manubrium) and itself during protraction and retraction of the scapula.

Multiple choice

The pericarp becomes modified into wings in

  1. samara

  2. lomentum

  3. achene

  4. cypsela

  5. drupes
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The pericarp becomes modified into wings in samara. It is a winged nut or achene containing one seed as in ash and maple.

Multiple choice

Which of the following options is not a part of the carpel?

  1. Ovary

  2. Filament

  3. Stigma

  4. Style
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The carpel (pistil) consists of three parts: stigma (receives pollen), style (connects stigma to ovary), and ovary (contains ovules). The filament is part of the stamen (male reproductive part) and supports the anther.