Select the correct matching of the type of the joint with the example in human skeletal
system
Types of joint Example
Cartilaginous joint Between frontal and parietal
Pivot joint Between third and fourth Cervical vertebrae
Hinge joint Between humerus and pectoral girdle
Gliding joint Between carpals
The characteristics and an example of a synovial joint in humans is
Characteristics
Examples
1.
Fluid cartilage between two bones, limited movements
Knee joints
2.
Fluid filled between two joints, provides cushion
Skull bones
3.
Fluid filled synovial cavity between two bones
Joint between atlas and axis
4.
Lymph filled between two bones, limited movement
Gliding joint between carpals
Which one of the following item gives its correct total number?
Floating ribs in humans - 4
Amino acids found in protiens -16
Types of diabetes - 3
Cervical vertebrae in humans - 8
In human body, which one of the following is anatomically correct ?
Floating ribs-2 pairs
Collar bones-3 pairs
Salivary glands-1 pair
Cranial nerves-10 pairs
Prostaglandins have no role in
inflammatory and allergic reactions
blood clotting
smooth muscle contraction
conduction of nerve impulses.
If a stimulus, several times greater than the threshold stimulus is provided to a muscle
fibre, it will
Contract with a larger force
Contract with a smaller force
Contract with a same force
undergo tetany
Which one of the following is a sesamoid bone?
Pelvis
Patella
Pterygoid
Pectoral girdle
Given diagram shows bone of the left human hindlimb as seen from front. It has certain mistakes in labeling. Two of the wrongly labelled bones are
tibia and tarsals
femur and fibula
fibula and phalanges
tarsals and femur
Which of the following is correct about the given figure?
The length of the thick and thin myofilaments has changed.
Length of both anisotropic and isotropic band has changed.
The myosin cross-bridges move on the surface of actin and the thin and thick myofilaments slide past each other.
Length of the sacromere remains same.
Skeletal muscles appear striated due to presence of two characteristic protiens in alternating dark and light bands. Which of the following is a correct match of the protien with its light refractive property and colour?
Protien Colour Property
Myosin Light Anisotropic
Actin Dark Anisotropic
Myosin Dark Isotropic
Actin Light Isotropic
During muscular contraction, which of the following events occur?
(i) H-zone disappears
(ii) A band widens
(iii) I band shortens
(iv) Width of A band is unaffected
(v) M line and Z line come closer
(i),(iii),(iv) and (v)
(i),(ii) and (v)
(ii),(iv) and (v)
(i),(ii) and (iii).
Which of the following is true for the labelled parts in the figure below?
A - Z-line - located at centre of I - band
B - Thin filament - occurs in A-band only
C - Thick filament - confined to I-band
D - H-zone - located at centre of M-line
The H-Zone in the skeletal muscle fibre is due to
the central gap between actin filaments extending through myosin filaments in the A-band
extension of myosin filaments in the central portion of the A-band
the absence of myofibrils in the central portion of A-band
the central gap between myosin filaments in the A-band
An example of stretch reflex triggered by passive muscle movement is the
tendon reflex
ipsilateral reflex
flexor reflex
patellar reflex
Gerdy fibres are
ligament of neck
ligament of ankles
ligament of palm
ligament of face.
Consider the diagram given below.
Parts labelled as A, B, C, D, E and F respectively indicate.
Sacrum, ilium, pubis, femur, tibia and fibula
Ilium, pubis, sacrum, femur, fibula and tibia
Sacrum, pubis, ilium, femur, tibia and fibula
Ilium, sacrum, pubis, femur, tibia and fibula
In old age, stiffness of joints is due to the
hardening of bones
inefficiency of muscles
decrease in synovial fluid
enlargement of bones
Oxygen content reduction makes the glycolyse (glycogenesis) intensity increased due to
increase of ADP concentration in cell
increase of NAD+ concentration in cell
increase of ATP concentration in cell
increase of concentration of peroxides and free radicals
Pick out the correct match
Sternum - 14
Pelvis - 3
Ribs - 20
Face - 5
Match Column-I with Column-II:
Column-I
Column-II
A. Structural and functional unit of a myofibril
B. Protein of thin filament
C. Protein of thick filament
D. The central part of thick filament not overlapped by thin filament
I. H-zone
II. Myosin
III. Sarcomere
IV. Actin
A - I, B - II, C - III, D - IV
A - I, B - III, C - II, D - IV
A - I, B - IV, C - III, D - II
A - III, B - IV, C - II, D - I
Sarcomere is the area between:
2 H-zones
2 Z-lines
2 M-lines
2 A-bands
Light bands (thin filaments) contain actin and are called:
A-bands or Isotropic band
A-bands or Anisotropic bands
I-bands or Isotropic bands
I-bands or Anisotropic bands
Dark bands (thick filaments) contain myosin and are called:
Choose the letter from the figure that most appropriately corresponds to the structure:
I.A-band II. I-band III. Sarcomere IV. H-zone
V.Myosin VI.Actin, Troponin, Tropomyosin VII. Z –line
I - E, II - D, III - F, IV - G, V - B, VI- C, VII - A
I - E, II - D, III - C, IV - G, V - B, VI - A, VII - F
I - E, II - D, III - F, IV - G, V - C, VI - A, VII - B
I - E, II - D, III - F, IV - A, V - B, VI - C, VII - G
The functions of tropomyosin in skeletal muscle include:
Release Ca+2 after initiation of contraction
Acting as "relaxing protein" at rest by covering up the sites where myosin binds to actin
Generates ATP
Ca+2 bind ________ in the skeletal muscles and leads to exposure of the binding site for ________ on the filament _______:
Troponin, myosin, actin
Troponin, actin, relaxin
Actin, myosin, troponin
Tropomysin, myosin, actin
Following is the figure of actin (thin) filaments. Identify A, B and C:
A - Tropomyosin, B - Troponin, C - F-actin
A - Troponin, B - Myosin, C - Tropomyosin
A - Troponin, B - Tropomyosin, C - Myosin
A - Troponin, B - Tropomyosin, C - F-actin
The above figure is related with myosin monomer (meromyosin). Identify A to C:
A - head, B - cross arm, C - GTP binding sites
A - head, B - cross arm, C - Ca+2 binding sites
A - head, B - cross arm, C - ATP binding sites
A - cross arm, B - head, C - ATP binding sites
The action potential that triggers a muscle contraction travels deep within the muscle cell by means of:
Sarcoplasmic reticulum
Transverse tubules
Synapse
Motor end plates
ATP provides energy for muscle contraction by allowing for:
An action potential formation in the muscle cell
Cross-bridge attachment of myosin to actin
Cross-bridge detachment of myosin from actin
Release of Ca+2 from sarcoplasmic reticulum
Please disable the adBlock and continue. Thank you.
