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Quiz 6
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Q.1
A skull bone is ... ... [ AFMC 2007]
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a) Atlas
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b) Pterygoid
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c) Arytenoid
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d) Coracoid
Explanation
The pterygoid is a paired bone forming part of the palate of many vertebrates, behind the palatine bones. In humans it becomes the pterygoid processes of the sphenoid bone. This anatomy article is a stub. Answer : (b)
Q.2
Joint between humerus and radio-ulna is ... ... [ MPPMT 1994]
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a) Ball and socket
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b) Pivot
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c) Gliding
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d) Hinge
Explanation
Joint between humerus and radio-ulna is Hinge Answer : (d)
Q.3
We move our hands while walking for ... .... [ AIIMS 2000 ]
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a) Faster movement
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b) balancing
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c) increased blood circulation
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d) Relieving tension
Explanation
Answer : (b)
Q.4
End plate junction is present between ... ...[ CPMT 2010]
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a) Neuron and striated muscle
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b) Neuron and neuron
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c) Muscle and muscle
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d) Both b and c
Explanation
Answer : (a)
Q.5
Number of bone present in human cranium is .... ... [ JKCMEE 2004]
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a) 8
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b) 10
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c) 12
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d) 16
Explanation
The human skull is generally considered to consist of twenty-two bones—eight cranial bones and fourteen facial skeleton bones. In the neurocranium these are the occipital bone, two temporal bones, two parietal bones, the sphenoid, ethmoid and frontal bones Answer : (a)
Q.6
Joint where synovial capsule and synovial fluid are lacking is ... ....[ EAMCET 2005]
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a) Carpal - carpal
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b) Pubic symphysis in females
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c) Finger and toes in males
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d) Femur and pelvis in females
Explanation
The pubic symphysis is a secondary cartilaginous joint (a joint made of hyaline cartilage and fibrocartilage) located between the left and right pubic bones near the midline of the body Answer : (b)
Q.7
Scapula extends between ... ... [ kerala 2011]
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a) Second and fifth ribs
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b) Second and seventh ribs
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c) third and sixth ribs
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d) Third and eight ribs
Explanation
The scapula, a triangular, flat bone, lies on the posterolateral aspect of the thorax, overlying the 2nd to 7th ribs. Answer : (b)
Q.8
Total number of bones found in human skull is ... ... [ AFMC 2001]
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a) 22
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b) 29
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c) 35
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d) 72
Explanation
The human skull is generally considered to consist of twenty-two bones—eight cranial bones and fourteen facial skeleton bones. In the neurocranium these are the occipital bone, two temporal bones, two parietal bones, the sphenoid, ethmoid and frontal bones. Bones of the head: There are 29 bones in the human head. They consist of 8 cranial bones, 14 facial bones, the hyoid bone, and 6 auditory (ear) bones. Answer : (a)
Q.9
At times ligaments and tendons are overstretched or torn. The phenomenon is ... .... [ Wardha 2003]
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a) Sprain
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b) Dislocation
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c) Fracture
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d) Tension
Explanation
A sprain is a stretched or torn ligament. Answer : (a)
Q.10
Ginglymoid/hinge joint occurs in ... ... [ EAMCET 2002 ]
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a) Elbow and shoulder
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b) Elbow and knee
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c) Atlas and odontoid process
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d) Knee and ankle
Explanation
A hinge joint is a common class of synovial joint that includes the ankle, elbow, and knee joints. Hinge joints are formed between two or more bones where the bones can only move along one axis to flex or extend. Answer : (b)
Q.11
Select the correct statement about disorder of muscular or skeletal system ... .... [ CBSE 2012]
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a) Muscular dystrophy - Age related shortening of muscles
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b) Myasthenia gravis - Autoimmune disorder which inhibits sliding of myosin, filaments
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c) Gout - Inflammation of joints due to extra deposition of calcium
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d) Osteoporosis - Decrease in bone mass and higher chances of fractures with advancing age
Explanation
Muscular dystrophy (MD) is a group of muscle diseases that results in increasing weakening and breakdown of skeletal muscles over time. Statement (a) is correct Myasthenia gravis is a rare neuromuscular disorder that causes weakness in the skeletal muscles. Statement (b) is correct Gout is a type of arthritis that causes inflammation, usually in one joint, that begins suddenly. Gouty arthritis is caused by the deposition of crystals of uric acid in a joint. Statement (c) is wrong Osteoporosis is a condition of fragile bone with an increased susceptibility to fracture. Osteoporosisweakens bone and increases risk of bones breaking. Statement (d)is correct Answer : (d)
Q.12
Trochanters occur in ... ... [ CPMT 1994]
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a) Humerus
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b) Tibio-fibula
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c) Femur
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d) Radio-ulna
Explanation
The greater trochanter - A powerful protrusion located at the proximal (near) and lateral (outside) part of the shaft of the femur. The greater trochanter is also called the major trochanter, the outer trochanter, and the lateral process of the femur. The lesser trochanter - A pyramidal prominence that projects from the proximal (near) and medial (inside) part of the shaft of the femur. The lesser trochanter is also called the minor trochanter, the inner trochanter, and the medial process of the femur. Answer : (c)
Q.13
Read the statements regarding muscle proteins ... .. [ kerala 2010] i) Actin is a thin filament and is made up of two F-actins ii) Complex protein, tropomyosin is distributed at regular intervals on troponin iii) Myosin is a thick filament which is also a polymerised protein iv) Globular head of meromyosin consists of heavy meromyosin Of the above statements
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a) i, ii and iv are correct
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b) i and iii are correct
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c) i, ii and iii are correct
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d) i, iii and iv are correct
Explanation
Troponin is distributed at regular intervals on the tropomyosin. Statement (ii) is wrong Answer : (d)
Q.14
Number of bones in cranium, face, hyoid and middle ear are respectively ... .. [ kerala 2007]
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a) 14, 8, 1 and 3
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b) 8, 14, 1 and 3
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c) 3, 8, 14 and 1
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d) 14, 8, 3 and 1
Explanation
The human skull is generally considered to consist of twenty-two bones—eight cranial bones and fourteen facial skeleton bones. In the neurocranium these are the occipital bone, two temporal bones, two parietal bones, the sphenoid, ethmoid and frontal bones. Answer : (b)
Q.15
Gastrocnemius muscles are found in .... .... [ RPMT 1996]
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a) Fore arm
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b) Chest
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c) Thigh
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d) Shank
Explanation
Shank is the part of the lower limb in humans between the knee and the ankle Answer : (d)
Q.16
Lactic acid generated during muscle contraction is elaborated to form glycogen in ... .... [ EAMCET 2005]
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a) Liver
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b) Pancreas
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c) Kidney
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d) Muscle
Explanation
Glycogen is a stored form of glucose. It is a large multi-branched polymer of glucose which is accumulated in response to insulin and broken down into glucose in response to glucagon. Lactic is converted to glucose in Liver. Answer : (a)
Q.17
In a resting muscle fibre, tropomyosin partially covers ... ... [ AMU 2010]
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a) Ca-binding sites on action
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b) Ca-binding sites on troponin
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c) Actin binding sites on myosin
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d) Myosin binding sites on actin
Explanation
At rest, troponin molecules hold tropomyosin fibers so that they cover the myosin-binding sites on actine Answer : (d)
Q.18
The type of muscle present in the alimentary canal is ... ... [ Odisha 2010]
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a) Smooth muscle fibres
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b) Striped muscle fibres
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c) Cardiac muscle fibres
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d) Both a and b
Explanation
The smooth muscle of the alimentary canal (the digestive tract) facilitates the peristaltic waves that move swallowed food and nutrients. Answer : (a)
Q.19
Which is correct description? ... ... [ CBSE 2010]
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a) First vertebra is axis which articulates with occipital condyles
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b) Parietal bone and temporal bone of skull are jointed by fibrous joint
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c) 9th and 10th pairs of ribs are called floating ribs
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d) Glenoid cavity is depression to which thigh bone articulates
Explanation
The occipital condyles are undersurface protuberances of the occipital bone in vertebrates, which function in articulation with the superior facets of the atlas vertebra. Statement (a) wrong. The 11th and 12th pairs—floating ribs.Statement (c) is wrong. The head of the femur (thigh bone) articulates with the acetabulum in the pelvic bone forming the hip joint Statement (d) wrong. The skull bones are connected by fibrous joints called sutures. Statement (b) is true Answer : (b)
Q.20
Joint between metacarpals and phalanges is ... ...[ MHTCET 2003]
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a) Ball and socket
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b) Pivot
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c) Saddle
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d) Hinge
Explanation
The metacarpophalangeal joints (MCP) refer to the joints between the metacarpal bones and the phalanges of the fingers. The interphalangeal joints of the hand are the hinge joints between the phalanges of the fingers that provide flexion towards the palm of the hand. Answer : (c)
Q.21
Deltoid ridge of humerus is meant for ... ...
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a) Articulation
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b) Attachment of muscles
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c) Protection
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d) None of the above
Explanation
The ridge on the humerus where the deltoid muscle is attached. The pectoral and deltoid ridges are important points of muscle attachment. The pectoral ridge extends from the greater tubercle along the medial edge of the bone and the deltoid ridge extends from the greater tubercle along the lateral edge of the bone. Answer : (b)
Q.22
Ilium is part of ... ... [ CET Chd 1997]
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a) Small intestine
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b) Pectoral girdle
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c) Pulmonary tract
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d) Pelvic girdle
Explanation
Answer : (d)
Q.23
Synovial joint occurs in between .... .... [ MPPMT 1992]
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a) Tail vertebrae
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b) Humerus and ulna
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c) Two skull bones
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d) Two vertebrae
Explanation
Tail vertebrae or coccygeal vertebraeThe four terminal segments of the vertebral column, usually fused to form the coccyx. Humerus and ulna have simple hinge-joint which is Synovial joint. The skull bones are connected by fibrous joints called sutures. The facet joints, are a set of synovial, plane joints between the articular processes of two adjacent vertebrae. Answer : (b)
Q.24
Consider the parts labelled as a, b, c, d and e respectively in the diagram and find out the correct sequence ... ...[ kerala 2006]
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a) Iliac fossa, Acetabulum, Pubic bone, Ischium, Pubic symphysis
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b) Pubic bone, Pubic symphysis, Iliac fossa, Acetabulum, , Ischium,
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c) Iliac fossa, Aceta bulum, , Ischium, Pubic symphysis,Pubic bone
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d) Ischium, , Pubic symphysis, Iliac fossa, Aceta bulum, Pubic bone
Explanation
Answer : (a)
Q.25
Which is not true for red fibres ... .... [ MPPMT 2011]
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a) Muscles contain a red coloured oxygen storing pigment
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b) Muscles contain plenty of mitochondria
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c) They are also called aerobic muscles
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d) Amount of sarcoplasmic reticulum is high
Explanation
White muscle fibres are designed for quick movements (like the muscles in hands& for moving eyes). Also they are used for high energy activity for short periods of time. Due to this they need more sarcoplasmic reticulumThe sarcoplasmic reticulum (SR) constitutes the main intracellular calcium store in striated muscle and plays an important role in the regulation of excitation-contraction-coupling (ECC) and of intracellular calcium concentrations during contraction and relaxation. Red Muscles(Example: extensor muscle on back of human body) 1.Red muscles are thin muscle fibres 2. Red in colour due to the presence of large amount of myoglobin 3.Slow and sustained contraction 4.Depend on aerobic metabolism for energy (oxidative phosphorylation) 5.Mitochondria is abundant 6.No accumulation of lactic acid 7. Perform sustained work for a prolonged period without fatigue (slow but steady) 8.Lesssarcoplasmic reticulum White muscles (Example: Muscles of the eye ball) 1.White muscles are thick muscle fibres 2.White in colour due to less amount of myoglobin 3. Fast contraction 4. Depend on anaerobic metabolism for energy (glycolysis) 5. Mitochondria is less 6.lactic acid accumulation by glycolysis 7.Perform fast and strenuous work for a short period (fast but soon fatigue) 8.highsarcoplasmic reticulum Answer : (d)
Q.26
Joints between carpals are ... ... [ HPPMT 2011]
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a) Fibrous joints
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b) Cartilaginous joints
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c) Angular joints
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d) Gliding joints
Explanation
Many gliding joints are formed in the appendicular skeleton between the carpal bones of the wrist; between the carpals and the metacarpals of the palm; between the tarsal bones of the ankle; and between the tarsals and the metatarsals of the foot. Answer : (d)
Q.27
Red muscle fibres are rich in .... ... [ JIPMER 2002]
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a) Golgi bodies
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b) Mitochondria
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c) Lysosomes
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d) Ribosomes
Explanation
Red Muscle Fibres 1. These muscle fibres are dark red which is due to the presence of red haemoprotein called myoglobin. Myoglobin binds and stores oxygen as oxymyogiobin in the red fibres. Oxymyogiobin releases oxygen for utilization during muscle contraction. 2. Mitochondria are more in number. 3. Red muscles have less sarcoplasmic reticulum. 4. They carry out considerable aerobic oxidation without accumulating much lactic acid. Thus red muscle fibres can contract for a longer period without fatigue. 5. These muscle fibres have slow rate of contraction for long periods. Example: Extensor muscles of the human. Answer : (b)
Q.28
What are correct about synovial joint? ... ... [ BHU 2008] Ball and socket jointPivot joint Hinge joint Cartilaginous joint
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a) 1, 2, 3 correct
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b) 1, 2 correct
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c) 2, 4 correct
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d) 1, 3 correct
Explanation
A synovial joint is a connection between two bones consisting of a cartilage lined cavity filled with fluid. There are six types of synovial joints i)Ball and socket joint ii) Pivot joint iii) Hinge joint iv) Pivot joints v) Condyloid joints vi) Saddle joints Cartilaginous joints are connected entirely by cartilage (fibrocartilage or hyaline). Cartilaginous joints allow more movement between bones than a fibrous joint but less than the highly mobile synovial joint. Answer : (a)
Q.29
All or none law is not applicable for ... ... [ WB 2012]
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a) Single skeletal muscle fibre
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b) Whole skeletal muscle
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c) Single smooth muscle fibre
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d) Whole cardiac muscle
Explanation
The All-or-None law is the principle that the strength by which a nerve or muscle fiber responds to a stimulus is independent of the strength of the stimulus. If that stimulus exceeds the threshold potential, the nerve or muscle fiber will give a complete response; otherwise, there is no response. A whole skeletal muscle is considered an organ of the muscular system. Each organ or muscle consists of skeletal muscle tissue, connective tissue, nerve tissue, and blood or vascular tissue. Answer : (b)
Q.30
Stimulus several times greater than threshold stimulus is provided to muscle fibre. It will .... .... [ AIIMS 200 ]
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a) Contract with same force
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b) Contract forcefully
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c) Contract slightly
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d) Undergo tetany
Explanation
According to All-or-None law Stimulus several times greater than threshold stimulus is provided to muscle fibre. It will Contract with same force Answer : (a)
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