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Quiz 2
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Q.1
Collar bone is ... ... [ MPPMT 2012]
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a) Scapula
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b) Stapes
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c) Coracoid
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d) Clavicle
Explanation
Answer : (d)
Q.2
Number of ball and socket joints present in human body is .... ... [ Wardha 2003]
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a) 2
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b) 4
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c) 6
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d) 8
Explanation
Two in hip and two in shoulder 2 in ear oscicle between incus and stapes. The incudo-stapedial joint is the smallest ball-and-socket joint of the human body. It is formed by the ball like stapedial head fitting into the socket like laminar process of the incus. Answer : (c)
Q.3
In mammals, secondary palate is formed by union of ... ... [ EAMCET 2008]
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a) Premaxilla, pterygoid and squamosal
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b) Maxilla, quadrate and palatine
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c) Premaxilla, maxilla and palatine
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d) Premaxilla, quadrate and squamosal
Explanation
secondary palate is formed by union of Premaxilla, maxilla and palatine Answer : (c)
Q.4
In mammals the number of cervical vertebrae is always .... .... [ MPPMT 1994]
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a) 7
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b) 9
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c) 1
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d) 12
Explanation
All mammals except manatees and sloths have seven cervical vertebrae, whatever the length of the neck. This includes seemingly unlikely animals such as the giraffe, the camel, and the blue whale, Manatees are unusual amongst mammals in possessing just sixcervical vertebrae, Two-toed sloths (Choloepus) Answer : (a)
Q.5
Epiphyseal plate is involved in ... ....[ BHU 1997]
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a) Formation of bone
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b) Elongation of bone
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c) Thickness of bone
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d) All the above
Explanation
The epiphyseal plate is the area of growth in a long bone. It is a layer of hyaline cartilage where ossification occurs in immature bones. On the epiphyseal side of the epiphyseal plate, cartilage is formed. On the diaphyseal side, cartilage is ossified, and the diaphysis grows in length. Answer : (b)
Q.6
Bones become fragile due to .... ... [ DPMT 2007]
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a) Arthritis
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b) Osteoporosis
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c) Gout
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d) None of the above
Explanation
Osteoporosis is a condition of fragile bone with an increased susceptibility to fracture. Osteoporosis weakens bone and increases risk of bones breaking. Answer : (b)
Q.7
Obturator foramen occurs in ... ..... [ BHU 2007]
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a) Pelvic girdle
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b) Pectoral girdle
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c) Cranium
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d) Vertebra
Explanation
Answer : (a)
Q.8
Nucleus pulposus occurs in .... ... [ AFMC 2004]
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a) Brain
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b) Liver
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c) Kidney
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d) Intervertebral disc
Explanation
Answer : (d)
Q.9
Phalangeal/digital formula for human hand/foot is .... ...[ MHTCET 2007]
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a) 0, 2, 2, 3, 3
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b) 0, 2, 3, 3, 3
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c) 2, 2, 3, 3, 3
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d) 2, 3, 3, 3, 3
Explanation
The phalanges are digital bones in the hands and feet of most vertebrates. Most land mammals including humans have a 2-3-3-3-3 formula in both the hands (or paws) and feet Answer : (d)
Q.10
Red muscles have abundant ... ... [ kerala 2001]
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a) Lactic acid and acetic acid
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b) Glucose and haemoglobin
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c) Relaxin and myosin
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d) Myoglobin and cytochrome
Explanation
Red muscles have abundant Myoglobin and cytochrome. Myoglobin (symbol Mb or MB) is an iron- and oxygen-binding protein found in the muscle tissue of vertebrates in general and in almost all mammals. Cytochromes are iron containing hemeproteins central to which are heme groups that are primarily responsible for the generation of ATP via electron transport. Answer : (d)
Q.11
Number of lumbar vertebrae in human skeleton is ... .... [ HPPMT 2005]
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a) 12
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b) 7
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c) 5
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d) 2
Explanation
Position of human lumbar vertebrae (shown in red). It consists of 5 bones, from top to down, L1, L2, L3, L4 and L5. The lumbar vertebrae are, in human anatomy, the five vertebrae between the rib cage and the pelvis Answer : (c)
Q.12
Sigmoid notch of olecranon process is found in ... ... [ CPMT 2005]
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a) Tibio-fibula
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b) Femur
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c) Radio-ulna
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d) Humerus
Explanation
Answer : (c)
Q.13
Correct order of stages of muscle contraction is ... ... [ Guj CET 2011]
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a) Stimuli → Neurotransmitter secretion → Release of calcium → Cross-bridges formation → Excitation of T-system → Sliding of actin filament
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b) Stimuli Å Neurotransmitter secretion → Excitation of T-system → Release of Ca2+ → Cross-bridges formation → Sliding of action filaments → 'H' band diminishes
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c) Stimuli → Excitation of T-system → Neurotransmitter secretion → Cross-bridges formation → Sliding of actin filaments → 'H' band diminishes
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d) Stimuli → Neurotransmitter secretion → Cross-bridges formation → Excitation of T-system → Sliding of actin filaments
Explanation
Answer : (b)
Q.14
Part of the body having a single pair of bones is ... ... [ MPPMT 1994]
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a) Pelvic girdle
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b) External ear
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c) Wrist
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d) Lower Jaw
Explanation
The pelvic girdle consists of paired hipbones, connected in front at the pubic symphysis and behind by the Sacrum Answer : (a)
Q.15
The contractile protein of muscle is ... ... [ CBSE 2006]
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a) Tubulin
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b) Myosin
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c) Tropomyosin
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d) Actin
Explanation
The two contractile proteins in myofibrils are actin (part of the thin filament) and myosin (part of the thick filament). Answer : (b,d)
Q.16
Statements:A bands are dark and contain myosin.I-bands are light and contain actinDuring action, A band contractsPart between two successive Z-lines is sarcomereCentral part of thin filament, not overlapped by thick filament is H-zone ... ... [ kerala 2007]
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a) 1,2 and 3 are correct, 2 and 4 incorrect
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b) 1, 3 and 5 correct, 2 and 4 incorrect
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c) 1, 2 and 4 correct, 3 and 5 incorrect
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d) 1, 2 correct, 3, 4 and 5 incorrect
Explanation
Statement 3 is wrong as upon muscle contraction, the A-bands do not change their length (1.85 micrometer in mammalian skeletal muscle),whereas the I-bands and the H-zone shorten. This causes the Z lines to come closer together. Statement 5 is wrong as H-band is the zone of the thick filaments that is not superimposed by the thin filaments (actin) Answer : (c)
Q.17
Number of vertebrae in human skeleton is .... ... [ AFMC 1996]
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a) 30
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b) 32
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c) 33
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d) 35
Explanation
The vertebral column usually consists of 33 vertebrae Answer : (c)
Q.18
Smallest bone in Man is ... ... [ JIPMER 2002]
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a) Stapes
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b) Patella
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c) Nasal
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d) Palatine
Explanation
The stapes is the third bone of the three ossicles in the middle ear. The stapes is a stirrup-shaped bone, and the smallest in the human body. Answer : (a)
Q.19
Substance that accumulates in a fatigued muscle is ... ... [ Har PMT 2003]
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a) Pyruvic acid
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b) Lactic acid
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c) CO2
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d) A.D.P.
Explanation
Due to anaerobic respiration Lactic acid accumulates in a fatigued muscle Answer : (b)
Q.20
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 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.21
Involuntary muscular contraction is called .... .... [ JIPMER 2003]
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a) Muscle sprain
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b) Muscle fatigue
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c) Muscle spasm
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d) Muscle twitch
Explanation
Muscle spasms and cramps. Cramps are caused by muscle spasms -involuntary contractions of one or more muscles. They can be painful but are usually harmless Answer : (c)
Q.22
Which one is correctly matched? .... ...[ CBSE 2010]
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a) Tibia and fibula - Both from part of knee joint
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b) Cartilage and Cornea - No blood supply but do require O2 for respiratory needs
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c) Shoulder Joint and elbow joint - Ball and socket joint
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d) Premolars and molar-20 in all and 3-rooted
Explanation
Bones. Three bones meet to form your knee joint: your thighbone (femur), shinbone (tibia), and kneecap (patella). The fibula or calf bone is a leg bone located on the lateral side of the tibia Answer : (b)
Q.23
Number of bones in ( one half) of lower jaw in humans is .... ...... [DPMT 1999]
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a) 1
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b) 4
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c) 6
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d) 2
Explanation
The mandible, lower jaw or jawbone is the largest, strongest and lowest bone in the human face Answer : (a)
Q.24
Joint of sternum and ribs is ... ... [ CBSE 2000 ]
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a) Cartilaginous
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b) Fibrous joint
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c) Angular joint
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d) Hinge joint
Explanation
Answer : (a)
Q.25
Which one is anatomically correct ... ... [ CBSE 2008]
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a) Collar bones - 3 pairs
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b) Salivary glands - one pair
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c) Cranial nerves - 10 pairs
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d) Floating ribs - 2 pairs
Explanation
There are two collar (clavicles), one on the left and one on the right. There are three major pairs of salivary glands: In humans there are twelve or thirteen cranial nerves pairs Two ribs are "floating" ribs Answer : (d)
Q.26
Glenoid cavity is found in ... .... [ AMU 2000]
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a) Pelvic girdle
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b) Skull
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c) Pectoral girdle
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d) Sternum
Explanation
The glenoid cavity or glenoid fossa of scapula is a part of the shoulder. shoulder girdle Pectoral girdle. Answer : (c)
Q.27
Synovial joint is ... .. [ Odisha 2004]
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a) Ball and socket joint
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b) Pivot joint
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c) Hinge joint
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d) All the above
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 Answer : (d)
Q.28
Joints hip and shoulder are ... ...[ JKCMEE 2002]
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a) Pivot joints
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b) Ellipsoid joints
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c) Hinge joints
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d) Ball and socket joints
Explanation
The shoulder and hip joints are the only ball-and-socket joints in the human body due to the need for great motion at the end of the body’s limbs and the vast amount of musculature needed to move and support such flexible joints Answer : (d)
Q.29
Which is true of muscle contraction ... ...[CET Chd. 2001]
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a) Sarcolemma becomes permeable to Ca2+ ions
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b) Sarcolemma becomes permeable to Na+ ions
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c) Sarcolemma becomes nonpermeable to Na+ ions
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d) Concentration of Ca2+ ions is reduced in myoplasm
Explanation
Transmission of Nerve Impulse to Muscle Acetylcholine attaches to receptors on the sarcolemma of the muscle cell In response to binding of Acetylcholine to a receptor, the sarcolemma becomes permeable to sodium ion (Na+) Sodium ion rushes into cell generating an action potential and potassium leaves the cell Once started, muscle contraction cannot be stopped Answer : (b)
Q.30
Hensen's disk occurs in ... .... [ Odisha 2006]
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a) Myofibril of striated muscle
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b) Myofibril of unstriated muscle
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c) Myofibril of heart muscle
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d) None of the above
Explanation
Sacromere illustrates the thin actin and the thick myosin filaments. The area of the sarcomere has only myosin is called the Hensen'sdisk or H-band Answer : (a)
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