Assignment to class XI IPA

Assesment for class XI IPA
Multiple choice questions on the movement System
Choose the correct answer.
1. What is the skeletal system?
A. All the bones in the body B. All the muscles and tendons C. All the organs in the body D. All the bones in the body and the tissues that connect them.
2. How many bones are there in the average person’s body?
A. 33 B. 206 C. 309 D. It varies from person to person.
3. Which of the following statements is false?
A. Bone is where most white blood cells are made B. Bone acts as a store house for minerals C. Bone is a dry and a non-living tissue D. Bone protects and supports the body and its organs.
4. Which bone protects the brain?
A. Cranium B. Calcium C. Femur D. Vertebrae.
5. What makes bones so strong?
A. Silica B. Cartilage C. Blood and marrow D. Calcium and phosphorous.
6. What is the difference between bone and cartilage?
A. Bone is rubbery, and cartilage is firm B. Cartilage is rubbery, and bone is firm
C. Bone is a more primitive tissue than cartilage
D. Bone is inside the body, and cartilage is outside.
7. The hollow space in the middle of bones is filled with
A. Air B. Blood C. Bone cells D. Bone marrow.
8. What is the difference between compact bone and spongy bone?
A. They have different bone marrow B. They are made of different materials
C. They have different sizes of bone cells D. They have different arrangement of bone cells
9. What is a joint?
A hinge B. A ball and socket C. The place where two bones are joined
D. The place where tendons are fastened together.
10. Muscles are made of
A. Silica B. Polyester threads C. Calcium and phosphorous D. Groups of cells called fibres.
11. How do muscles attached to the bones move the body?
A. Automatically B. Pull movement only C. Push movement only
D. Push and pull movement.
12. What is the function of a tendon?
A. To link bones to bones B. To link muscles to bones C. To link muscles to ligaments
D. To bind the cells in compact bone closer together.
13. Osteoporosis is a bone disease caused by
A. Too much bone forming in the hips
B. The rate of bone absorption being greater that the rate of bone formation
C. The rate of bone formation being greater than the rate of bone absorption
D. A fracture of the hip.
14. Osteoporosis is
A very painful disease B. a disease occurring only in very young children
C. a painless disease that goes unnoticed for many years
D. a disease that only affects middle aged men.
15. Osteoporosis can be prevented by
A. A vaccine B. Antibiotics C. A diet with plenty of protein and fat
D. A calcium rich diet and exercise.
16. Osteoporosis can be treated by
A. Antibiotics. B. Surgery C. Drugs and/or hormone therapy D. Strenuous exercise.
17. What type of muscle is responsible for contractions of the digestive tract and arteries?
A. smooth muscle B. skeletal muscle C. striated muscle D. voluntary muscle E. cardiac muscle
18. Cardiac muscle is the only muscle composed of . . . . . . . fibers.
A. branched B. unstriated C. unbranched and cylindrical D. spindle shaped E. striated
19. . . . . . . muscle is attached to bones
A. Smooth B. Involuntary C. Cardiac D. Branched E. Skeletal
20. Ligaments connect . . . . . . .. . . . . . . to . . . . . . .. . . . . . ..
A. muscle ... tendon B. tendon ... tendon C. tendon ... bone D. muscle ... bone E. bone ... bone
21. Organs that come into contact with the environment are lined with which one of the following types of tissue?
A. smooth muscle B. epithelial C. adipose D. loose connective E. skin
22. Which of the following is NOT a benefit of multicellularity?
A. All cells can perform all metabolic functions.
B. Multicellularity allows for a larger size of organisms.
C. Cells can specialize.
D. Multicellular organisms can form tissues.
E. Multicellular organisms can form organs and organ systems.
23. Bone cells are called . . . . . . .. . . . . . ..
A. osteocytes B. chondrocytes C. neurons D. osteoblasts E. erythrocytes

24. Myosin and actin are . . . . . . .. . . . . . ..
A. proteins that play a major role in muscle contraction B. antagonistic muscle groups C. types of skeletal muscle D. found localized in intercalated disks E. unique to cardiac muscle
25. Each skeletal muscle fiber . . . . . . .. . . . . . ..
A. has striations B. consists of a single cell C. contains many parallel contractile units called myofibrils D. contains many nuclei E. all of the above
26. Which of these is a component of a human's appendicular skeleton?
A. ribs B. sternum C. femur D. skull E. vertebral column
27. What type of joint allows you to open and close your mouth?
A. ball and socket B. hinge C. pivot D. saddle E. none of the above
28. What type of joint allows you to shake your head "no"?
A. ball and socket B. hinge C. pivot D. saddle E. none of the above
29. What type of joint is found where the humerus joins the shoulder blade?
A. ball and socket B. hinge C. pivot D. saddle E. none of the above
30. The thick filaments of sarcomeres are composed of . . . . . . ..
A. myofibrils B. actin C. motor neurons D. myosin E. Z lines
31. The thin filaments of sarcomeres are composed of . . . . . . ..
A. myofibrils B. actin C. motor neurons D. myosin E. Z lines
32. A single muscle cell is referred to as a . . . . . . ..
A. myofibril B. muscle fiber C. muscle neurons D. sarcolemma E. sarcomere
33. During the course of muscle contraction the potential energy stored in ATP is transferred to potential energy stored in . . . . . . ..
A. the myosin head B. the myosin tail C. the thin filament D. actin E. the Z line
34. The release of . . . . . . . ions from the sarcoplasmic reticulum is required for skeletal muscle contraction.
A. sodium B. phosphate C. potassium D. chloride E. calcium
35. Myosin heads bind to . . . . . . ., which they then pull and cause to slide toward the center of the sarcomere.
A. thin filaments B. Z lines C. sarcomeres D. myofibrils E. thick filaments