Chapter 20 Locomotion And Movement

Question 1. Match the following and mark the correct option

Column I

A. Fast muscle fibres

B. Slow muscle fibres

C. Actin filament

D. Sarcomere

Column II

i. Myoglobin

ii. Lactic acid

iii. Contractile unit

iv. I-band

Options:

(a) A-i, B-ii, C-iv, D-iii

(b) A-ii, B-i, C-iii, D-iv

(c) A-ii, B-i, C-iv, D-iii

(d) A-iii, B-ii, C-iv, D-i

Question 2. Ribs are attached to

(a) Scapula

(b) Sternum

(c) Clavicle

(d) Ilium

Question 3. What is the type of movable joint present between the atlas and axis?

(a) Pivot

(b) Saddle

(c) Hinge

(d) Gliding

Question 4. ATPase of the muscle is located in

(a) Actinin

(b) Troponin

(c) Myosin

(d) Actin

Question 5. Intervertebral disc is found in the vertebral column of

(a) Birds

(b) Reptiles

(c) Mammals

(d) Amphibians

Question 6. Which one of the following is showing the correct sequential order of vertebrae in the vertebral column of human beings?

(a) Cervical — lumbar — thoracic — sacral — coccygeal

(b) Cervical — thoracic — sacral — lumbar — coccygeal

(c) Cervical — sacral — thoracic — lumbar — coccygeal

(d) Cervical — thoracic — lumbar — sacral — coccygeal

Question 7. Which one of the following pairs is incorrect?

(a) Hinge joint: between Humerus and Pectoral girdle

(b) Pivot joint : between atlas and axis

(c) Gliding joint : between the carpals

(d) Saddle joint : between carpals and metacarpals of thumb

Question 8. Knee joint and elbow joint are examples of

(a) Saddle joint

(b) Ball and socket joint

(c) Pivot joint

(d) Hinge joint

Question 9. Macrophages and leucocytes exhibit

(a) Ciliary movement

(b) Flagellar movement

(c) Amoeboid movement

(d) Gliding movement

Question 10. Which one of the following is not a disorder of bone?

(a) Arthritis

(b) Osteoporosis

(c) Rickets

(d) Atherosclerosis

Question 11. Which one of the following statement is incorrect?

(a) Heart muscles are striated and involuntary

(b) The muscles of hands and legs are striated and voluntary

(c) The muscles located in the inner walls of alimentary canal are striated and involuntary

(d) Muscles located in the reproductive tracts are unstriated and involuntary

Question 12. Which one of the following statements is true?

(a) Head of humerus bone articulates with acetabulum of pectoral girdle.

(b) Head of humerus bone articulates with the glenoid cavity of pectoral girdle.

(c) Head of humerus bone articulates with acetabulum of pelvic girdle.

(d) Head of humerus bone articulates with a glenoid cavity of pelvic girdle.

Question 13. Muscles with characteristic striations and involuntary are

(a) Muscles in the wall of alimentary canal

(b) Muscles of the heart

(c) Muscles assisting locomotion

(d) Muscles of the eyelids

Question 14. Match the followings and mark the correct option

Column I

A. Sternum

B. Glenoid Cavity

C. Freely movable joint

D. Cartilaginous joint

Column II

i. Synovial fluid

ii. Vertebrae

iii. Pectoral girdle

iv. Flat bones

Options:

(a) A-ii, B-i, C-iii, D-iv

(b) A-iv, B-iii, C-i, D-ii

(c) A-ii, B-i, C-iv, D-iii

(d) A-iv, B-i, C-ii, D-iv

Question 1. Name the cells/tissues in human body which

a. exhibit ameboid movement

b. exhibit ciliary movement

Question 2. Locomotion requires a perfect coordinated activity of muscular, _____, _______ systems

Question 3. Sarcolemma, sarcoplasm and sarcoplasmic reticulum refer to a particular type of cell in our body. Which is this cell and to what parts of that cell do these names refer to?

Question 4. Label the different components of actin filament in the diagram given below.

Question 5. The three tiny bones present in middle ear are called ear ossicles. Write them in correct sequence begining from ear drum.

Question 6. What is the difference between the matrix of bones and cartilage?

Question 7. Which tissue is afflicted by Myasthenia gravis? What is the underlying cause?

Question 8. How do our bone joints function without grinding noise and pain?

Question 9. Give the location of a ball and socket joint in a human body

Question 10. Our fore arm is made of three different bones. Comment.

Question 1. With respect to rib cage, explain the following:

a. Bicephalic ribs

b. True ribs

c. Floating ribs

Question 2. In old age, people often suffer from stiff and inflamed joints. What is this condition called? What are the possible reasons for these symptoms?

Question 3. Exchange of calcium between bone and extracellular fluid takes place under the influence of certain hormones

a. What will happen if more of $Ca^{2+}$ is in extracellular fluid?

b. What will happen if very less amount of $Ca^{2+}$ is in the extracellular fluid?

Question 4. Name atleast two hormones which result in fluctuation of $Ca^{2+}$ level.

Question 5. Rahul exercises regularly by visiting a gymnasium. Of late he is gaining weight. What could be the reason? Choose the correct answer and elaborate.

(a) Rahul has gained weight due to accumulation of fats in body.

(b) Rahul has gained weight due to increased muscle and less of fat.

(c) Rahul has gained weight because his muscle shape has improved.

(d) Rahul has gained weight because he is accumulating water in the body.

Question 6. Radha was running on a treadmill at a great speed for 15 minutes continuously. She stopped the treadmill and abruptly came out. For the next few minutes, she was breathing heavily/fast. Answer the following questions.

a. What happened to her muscles when she did strenuously exercised?

b. How did her breathing rate change?

Question 7. Write a few lines about Gout.

Question 8. What is the source of energy for muscle contraction?

Question 9. What are the points for articulation of Pelvic and Pectoral girdles?

Question 1. Calcium ion concentration in blood affects muscle contraction. Does it lead to tetany in certain cases? How will you correlate fluctuation in blood calcium with tetany?

Question 2. An elderly woman slipped in the bathroom and had severe pain in her lower back. After X-ray examination doctors told her it is due to a slipped disc. What does that mean? How does it affect our health?

Question 3. Explain sliding filament theory of muscle contraction with neat sketches.

Question 4. How does a muscle shorten during its contraction and return to its original form during relaxation?

Question 5. Discuss the role of $Ca^{2+}$ ions in muscle contraction. Draw neat sketches to illustrate your answer.

Question 6. Differentiate between Pectoral and Pelvic girdle.