What is true about the white muscle fibers?
1. Myoglobin content is high
2. They have a large number of mitochondria
3. They depend on anaerobic process for energy
4. They are adapted for slow sustained activities
Hypocalcemia may lead to:-
1. Kidney stones
2. Cholelithiasis
3. Stronger muscle contractions
4. Tetany
Match each item in Column I with one item in Column II and choose your answer from the codes given below:
Column I | Column II | ||
I. | Influx of sodium | 1. | Original establishment of RMP |
II. | Efflux of potassium | 2. | Repolarization |
III. | Na+/K+ pump | 3. | Depolarization |
IV. | Ca++ | 4. | Plateau in cardiac muscles |
Codes :
I | II | III | IV | |
1. | 3 | 2 | 4 | 1 |
2. | 2 | 1 | 4 | 3 |
3. | 2 | 1 | 3 | 4 |
4. | 3 | 2 | 1 | 4 |
Lack of relaxation between successive stimuli in sustained muscle contraction is known as
(1) fatigue
(2) tetanus
(3) tonus
(4) spasm
Which of the following is not a function of the skeletal system?
1. Production of erythrocytes
2. Storage of minerals
3. Production of body heat
4. Locomotion
An example of stretch reflex triggered by passive muscle movement is the
(1) tendon reflex
(2) ipsilateral reflex
(3) flexor reflex
(4) patellar reflex
Gerdy fibres are
(1) ligament of neck
(2) ligament of ankles
(3) ligament of palm
(4) ligament of face.
The compound or pigment acting as an oxygen store in skeletal muscles is:
(1) Myoglobin
(2) Haemoglobin
(3) Myokinase or ATP
(4) Cytochrome
I. Number of mitochondria less.
II. Number of mitochondria more
III. Sarcoplasmic reticulum is abundant
IV. Myoglobin content high
V. Sarcoplasmic reticulum moderate
VI. Aerobic muscles
VII. Depend on anaerobic respiration for energy
VIII. Less myoglobin content
A. Red muscles B. White muscles
Identify above (I to VIII) traits as characteristic of A and B types of muscles:
(1) A - I, III, VII, VIII; B - II, IV, V, VI
(2) A - II, IV, V, VI; B - I, III, VII, VIII
(3) A - I, III, IV, VII; B - II, V, VI, VIII
(4) A - II, V, VI, VIII; B - I, III, IV, VII
Tetany is the rapid spasm in muscles due to:
(1) High Ca+2 in body fluid
(2) Low Ca+2 in body fluid
(3) High uric acid in body fluid
(4) High urea in blood