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151.

A fracture in which a small piece of the bone is broken, but remains attached with the ligament is known asA. Green stick fractureB. Evulsion fractureC. Comminuted fractureD. Compound fracture.

Answer» Correct Answer - B
152.

In human beings the cranium is formed byA. Eight bones of which two are pairedB. Fourteen bones of which six are pairedC. Ten bones of which two are pairedD. Twelve bones of which four are paired

Answer» Correct Answer - A
The cranium is formed by 8 bones (1 frontal bone, 2 parietal, 2 temporal, 1 occipitai,1 sphenoid, 1 ethmoid).
153.

Cranium of human containsA. 8 bonesB. 14 bonesC. 12 bonesD. 20 bones.

Answer» Correct Answer - A
Cranium consists of 8 bones-1 frontal, 2 parietal, 2 temporal, 1 occipital, 1 sphenoid and 1 ethmoid.
154.

Mechanism of muscle contraction is best explained by____

Answer» Correct Answer - Sliding filament theory
155.

In human beings the cranium is formed byA. Eight bones of which two are paired B. Ten bones in which two are pairedC. Twelve bones of which four are paired D.

Answer» Correct Answer - A
In human beings cranium is formed by eight bones of which two are paired.
156.

The example of pivot joint isA. Ankle jointB. Hip jointC. Radioulnar jointD. Metacarpophalangial joint

Answer» Correct Answer - C
Pivot joint: Between atlas and axis called atlantoaxial joint. Between radius and ulna (radio-ulnar joint). Just below tha elbow.
157.

MECHANISM OF MUSCLE CONTRACTION

Answer» During skeletal muscle contraction, the thick filament slides over the thin filament by a repeated binding and releases myosin along the filament. This whole process occurs in a sequential manner.
Step 1: Muscle contraction is initiated by signals that travel along the axon and reach the neuromuscular junction or motor end plate. Neuromuscular junction is a junction between a neuron and the sarcolemma of the muscle fibre. As a result, Acetylcholine (a neurotransmitter) is released into the synaptic cleft by generating an action potential in sarcolemma.
Step 2: The generation of this action potential releases calcium ions from the sarcoplasmic reticulum in the sarcoplasm.
Step 3: The increased calcium ions in the sarcoplasm leads to the activation of actin sites. Calcium ions bind to the troponin on actin filaments and remove the tropomyosin, wrapped around actin filaments. Hence, active actin sites are exposed and this allows myosin heads to attach to this site.
Step 4: In this stage, the myosin head attaches to the exposed site of actin and forms cross bridges by utilizing energy from ATP hydrolysis. The actin filaments are pulled. As a result, the H-zone reduces. It is at this stage that the contraction of the muscle occurs.
Step 5: After muscle contraction, the myosin head pulls the actin filament and releases ADP along with inorganic phosphate. ATP molecules bind and detach myosin and the cross bridges are broken.
Stage 6: This process of formation and breaking down of cross bridges continues until there is a drop in the stimulus, which causes an increase in calcium. As a result, the concentration of calcium ions decreases, thereby masking the actin filaments and leading to muscle relaxation.
158.

Macrophages and leucocytes exhibitA. Ciliary movement B. Flagellar movement C. Amoeboid movement D. Gliding movement

Answer» Correct Answer - C
Macrophages and leucocytes exhibit amoeboid movements.
159.

Macrophages and leucocytes exhibitA. ciliary movementB. flagellar movementC. amoeboid movementD. gliding movement

Answer» Correct Answer - C
Macrophages and leucoytes exhibit amoeboid movement which is effected by pseudopodia due to the streaming of protoplasm.
160.

Which of the following is a source of energy for muscle contraction ?A. Glucose B. GTP C. Creatme phosphateD. ATP

Answer» Correct Answer - D
Immediate source of energy for muscle contraction is ATP.
161.

Which of the following is a source of energy for muscle contraction ?A. GlucoseB. GTPC. Creatine phosphateD. ATP.

Answer» Correct Answer - D
162.

During strenous exercise glucose is converted intoA. GlycogenB. Pyruvic acidC. StarchD. Lactic acid.

Answer» Correct Answer - D
163.

In which cateory of muscle of muscle contraction the filament that move to shorten a muscle areA. Skeletal muscle fibreB. Cardiac muscle fibreC. Smooth muscle fibresD. All of these

Answer» Correct Answer - D
164.

We move our hands while walking forA. Faster movementB. BalancingC. Increasing blood cicrulationD. Relieving tension.

Answer» Correct Answer - B
165.

We move our hands while walking forA. Faster movement B. BalancingC. Increasing blood circulation D. Relieving tension

Answer» Correct Answer - B
166.

During walking talus Passes/transmits about the half of the weight of body toA. CuneiformB. CuboidC. CuncaneumD. Navicular

Answer» Correct Answer - C
167.

A cricket player is fast chasing ball in the field.Which one of the following group of bones is directly contributing in this movement ?A. Femur , Malleus tibia metatarsalsB. Tarsals , fermuar , metatarsals tibiaC. Pelvis , ulna , patella tarsalsD. Sternum femur tibia fibula

Answer» Correct Answer - B
168.

Pelvic girdle consists of ventrallyA. Two coxal bones B. One coxal bone a. FloatmgC. Three coxal bonesD. Four coxal bones

Answer» Correct Answer - A
Pelvic girdle consists of two coxal bones(Innominate bone). Each coxal bone is formed by the fusion of three bones-illum, ischium and pubis.
169.

Ribs are attached toA. scapulaB. sternumC. clavicleD. ilium

Answer» Correct Answer - B
There are 12 pair of ribs. Each rib is a thin is flat bone connected dorsally to the vertebra column and ventrally to sternum.
170.

Ribs are attached toA. scapulaB. sternumC. clavicleD. ileum

Answer» Correct Answer - b
171.

The 8th and 9th ribs are known as false are known as false ribs because their external portions are attached toA. XiphisternumB. Costa of `7^(th)` ribC. They have no costaD. They are not true ribs

Answer» Correct Answer - B
The eighth, ninth tenth pairs of ribs are called false ribs. They articulate by cartilage with costal cartilage of the seventh rb.
172.

Match the columns I and II, and choose the correct combination from the options given `{:(,"Column I","Column II"),((a),"Tribus ribs",(1)"Attached to vertebral column dorsally and to seventh rib ventrally"),((b),"False ribs",(2)"Do not connected ventrally"),((c ),"Floating ribs",(3)"Attached to vertebral column dorsally and to sternum ventrally"):}`A. a-1,b-2,c-3B. a-3,b-1,c-2C. a-1,b-3,c-2D. a-3,b-2,c-1

Answer» Correct Answer - B
.First seven pairs of ribs are called true ribs.
.Dorsally, they are attached to the thoracic verte brae and ventrally connected to the sternum with the help of hyaline cartilage.
.The `8^(th), 9^(th) & 10^(th)` pairs of ribs do not articulate directly with the sternum but join the seventh rib with the help of hyaline cartilage. These are called vertebrochondral (false) ribs.
173.

How many phalganes are present in a normal human adult?A. 14B. 30C. 29D. 56

Answer» Correct Answer - D
56 phalanges are present in normal human adult as one limb has 14 phalanges.
174.

Muscles with characteristic striations and involuntary areA. Muscles in the wall of alimentary canalB. Muscles of the heartC. Muscles assisting locomotionD. Muscles of the eyelids.

Answer» Correct Answer - B
175.

Muscles with characteristic striations and involuntary areA. muscles in the wall of alimentary canalB. muscles of the heartC. muscles assisting locomotionD. muscles of the eyelids

Answer» Correct Answer - b
176.

Muscles with characteristic striations and involuntary areA. Muscles in the wall of alimentary canalB. Muscles of the heart C. Muscles assisting locomotion D. Muscles of the eyelids

Answer» Correct Answer - B
Muscles with characteristic striations and involuntary are muscles of the heart.
177.

The amoeboid movements result fromA. Action of Cytoplasm and ActinB. Coordinated beats of ciliaC. Whip-like action of flagellaD. Action by the mitotic spindle, similar to what happens during mitosis and meiosis.

Answer» Correct Answer - A
178.

The amoeboid movement results fromA. interaction among actin, myosin and ATP, etc.B. coordinated beats of ciliaC. whip like action of flagellaD. action by the mitotic spindle, similar to what happens during mitosis and meiosis.

Answer» Correct Answer - A
179.

Match the columns I and II, and choose the correct combination from the options given.  `{:(,"Column I","Column II"),((a),"Amoeboid movement",(1)"Paramoecuium"),((b),"Flagellar movement",(2)"Amoeba"),((c ),"Muscular movement",(3)"Euglena"),((d),"Ciliary movement",(4)"Eyelids"):}`A.  a-2, b-l, c--4, d-3 B. a-4, b-3, c--2, d-lC.  a-2, b--3, c-4, d-lD. a-3, b-4, c-2, 1-1

Answer» Correct Answer - C
`{:(,(a)" Amoeboid movement",(4)" Amoeba"),(,(b)" Flagllar movement",(1)" Euglena"),(,(c )" Muscular movement",(2)" Eyelids"),(,(d)" Ciliary movement",(3)" Paramoeecium"):}`
180.

Which of the following type of movements are seen in human body? a. Amoeboid b. Ciliary c. Flagellar d. MuscularA. a, b and cB. a, b and d C. a, c and dD. a, b, c and d

Answer» Correct Answer - B
Cells of the human body exhibit three main types of movements, namely, amoeboid, ciliary and muscular.
181.

Calcium ions bring about muscle contraction throughA. Activation of myosin ATP-aseB. Exposing active sites of actin filamentsC. Both A and BD. Mobilisation of food reserve.

Answer» Correct Answer - A
182.

The smooth sustained contraction of a muscle due to fusion of many twitches is calledA. TendonB. TetanusC. TwitchD. Rigor mortis

Answer» Correct Answer - B
183.

which of the following structures or regions is incorrectly paired with its function.A. Medulla oblongata: Controls respirationi and cardiovascualr reflex.B. Limbic system : consists of fibre tracts that interconnect different regions of brian, controls movementC. Hypothalamus : Production of releasing hormones and regulation of temperature, hunger and thirstD. Corpus callosum : band of fibres connecting left and right cerebal hemispheres

Answer» Correct Answer - B
184.

The dorsal, hat, triangular body of scapula has a slightly elevated ridge called theA. Spine B. Acromion processC. Olecranon processD. Odontoid process

Answer» Correct Answer - A
The dorsal, flat, triangular body of the scapula has a slightlu elevated ridge called the spine.
185.

Spine of the scapula is projected as a fiat, expanded process called A. Acromion B. Olecranon C. Odontoid D. Trochanter

Answer» Correct Answer - A
Spine of the scapula projected as a flat, expanded process called aromion.
186.

Which one of the following statements is true:A. Head of humerus bone articulates with acetabulum of pectoral girdleB. Head of humerus bone arti~ulates with " glenoid cavity of pectoral girdleC. Head of humerus bone articulate with a cavity called acetabullum of pelvic girdleD. Head of humerus bone articulates with a glenoid cavity of pelvic girdle.

Answer» Correct Answer - b
187.

Which of the following is/are not carrectly mathched pairs ? A. (ii) and (iii)B. (i) and (iv)C. (v) onlyD. (ii) only

Answer» Correct Answer - A
188.

In a relaxed fibril, H-zone, a lighter region of low density can be seen in the centre of " " Or The dark bands (Black bands) of a skeletal muscle are known asA. Anisotropic or A-bandB. Isotropic or I-bandC. Z-bandD. Both in A and I-band

Answer» Correct Answer - A
A-band has its middle a light zone called H-zone.
189.

Gout that leads to arthritis is associated with abnormality of A. Pyrimidine metabolismB. Purine metabolismC. Fat-metabolism D. Protein metabolism

Answer» Correct Answer - B
Gout that leads to arthritis is associated with abnormality of purine metabolism
190.

Gout that leads to arthritis is associated with abnormality of A. Pyrimidine metabolismB. Purine metabolismC. Fat metabolismD. Protein metabolism.

Answer» Correct Answer - B
191.

Which one is incorporated in muscle fibres? A. AcetylcholineB. Myoglobin C. Histone D. Cytochrome

Answer» Correct Answer - B
Muscle contains a red coloured oxygen storing pigment called myoglobin.
192.

Olecranon fossa is present overA. RadiusB. UlnaC. HumerusD. Femur

Answer» Correct Answer - C
193.

Mark the odd one out.A. ScaphoidB. LunateC. PisiformD. Calcaneum

Answer» Correct Answer - D
194.

The sigmoid notch is present inA. FemurB. Tibio-fibulaC. HumerusD. Radio-ulna

Answer» Correct Answer - D
195.

Sigmoid notch of olecranon process is found inA. Tibio-fibulaB. FemuerC. Radio-ulnaD. Humcrus

Answer» Correct Answer - C
Sigmoid notch of olecranon process is found in radio-ulna.
196.

Structure responsible for formation of sigmoid notch isA. Olecranon process of humerusB. Olecranon process of femurC. Olecranon process of radius ulnaD. Olecranon process of tibia fibula

Answer» Correct Answer - C
Ulna projects beyond the radius as an olecranon process which has a deep sub terminal sigmoid notch for articulation with the distal end of humerus.
197.

The sigmoid notch is present inA. FemurB. Tibio-fibulaC. HumerusD. Ulna

Answer» Correct Answer - D
The ulna is thicker and longer, which bears a subterminal cup like receptacle called sigmoid notch or olecranon notch, for articulation with the distal end of humerus.
198.

Presence of furcula is a characteristic feature ofA. FrogsB. ReptilesC. BirdsD. Mammals

Answer» Correct Answer - C
The clavicle and interclavicle form a V-shaped furcula or with bone or merrythought in birds.
199.

Which of the following joint helps in locomotory movements?A. Fibrous jointsB. Cartilaginous jointsC. Synovial jointsD. All of the above

Answer» Correct Answer - C
Synovial joints helps in locomotory movements
200.

Locomotory organs in starfish areA. Tube feetB. TentaclesC. CiliaD. Appendagas.

Answer» Correct Answer - A