Locomotion & Movement - Live Session - NEET & AIIMS 2019Contact Number: 9667591930 / 8527521718Locomotion & Movement - Live Session - NEET & AIIMS 2019Contact Number: 9667591930 / 8527521718The number of pairs of vertebrochondral ribs in humans are:
1. 3
2. 2
3. 7
4. 10
A large sesamoid bone in the leg is:
1. talus
2. patella
3. navicular
4. fibula
Osteomalacia is caused by the deficiency of:
1. estrogen.
2. zinc.
3. vitamin C.
4. vitamin D.
The extensions of the cell membrane that penetrate into the centre of skeletal and cardiac muscle cells is called as:
1. Transverse tubule system.
2. sarcoplasmic reticulum.
3. myofibrils.
Arrange the following events in correct chronological order:
1. calcium ions released from the sarcoplasmic reticulum
2. sarcoplasmic reticulum takes up calcium ions
3. Calcium ions diffuse towards troponin
4. action potential moves down the T tubule
5. the length of the sarcomere shortens
6. muscle relaxes
The majority of the muscle fibers in the skeletal muscles of leg of a long distance runner is expected to have:
1. adaptation for sudden outburst of activity
2. primarily anaerobic source of energy
3. numerous mitochondria
4. large deposits of glycogen
In smooth muscle contraction:
1. Calcium ions bind to troponin C.
2. Myosin has no role.
3. Troponin and tropomyosin are moved.
4. Calcium ions bind to calmodulin, which activates an enzyme.
Muscles get their energy directly from:
1. glucose
2. ATP
3. creatine phosphate
4. creatinine
Even when the blood supply is inadequate, the muscle is able to to sustain contraction due to:
1. the presence of hemoglobin
2. glycogen storage
3. myoglobin
4. citric acid cycle
A sustained muscle contraction evoked when the motor nerve that innervates a skeletal muscle emits action potentials at a very high rate is called as:
1. a sustained contraction
2. fatigue
3. tetanic contraction
4. treppe
Immediately after motor neuron passes an impulse to a muscle fiber:
1. the impulse travels over the sarcolemma in all directions.
2. calcium is released from the sarcoplasmic reticulum.
3. cross bridge form between the actin and myosin.
4. troponin undergoes a conformational change.
Identify the incorrect statement regarding a skeletal muscle fiber:
1. They continue to divide throughout childhood as skeletal muscles grow
2. They are formed by fusion of myoblasts during fetal development
3. They are true syncytium.
4. They are non-straited.
In a skeletal muscle, ATP:
1. is required for the dissociation of myosin from actin
2. is hydrolyzed by the ATPase is actin myofilament
3. is used to replenish cretine phosphokinase
4. is not used in breaking of cross bridges
Exposure to Sarin, a nerve gas will cause all the following except:
1. Failure to release acetylcholine at the neuromuscular junction
2. Prolonged depolarization of the motor end plate
3. paralysis eventually leading to death
4. Inability to break down acetylcholine
In an adult erythropoiesis will be maximum in:
1. femur
2. sternum
3. humerus
4. tibia
The critical event for contraction of striated muscles would be that calcium ions:
1. are released from troponin C
2. bind to tropomyosin
3. bind to troponin
4. are taken up by the sarcoplasmic reticulum.
For the muscular movements to be coordinated, it is important that:
1. the muscle twitches must be of increasing strength.
2. muscle is divided into motor units
3. type l fibers must be more than type ll fibers in a muscle
4. the muscle twitches undergo tetanization.
What type of joints are intervertebral discs?
1. sutures.
2. syndesmoses
3. symphyses
4. synovial joints
The synovial fluid in the synovial cavity is secreted by:
1. both articulating bone.
2. articular cartilage cells.
3. adipose cells.
4. the synovial membrane.
Sella turcica, that lodges the pituitary gland is present in:
1. sphenoid bone.
2. parietal bone.
3. ethmoid bone.
4. temporal bone.