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Class 11 Locomotion and Movement worksheet
CBSE Biology. Muscle contraction and the sarcomere, skeleton, joints, disorders. Every sheet has 20 questions in three sections and an answer key, and the numbers change every time.
Sample questions
Real questions from this chapter, as the app sets them. Tap Answer to see the answer and working.
Section A · multiple choice
- 1.
The number of bones in the adult human skeleton is:
- 212
- 196
- 208
- 206
Answer
(d) 206
80 axial, 126 appendicular
- 2.
A sarcomere is 3.4 µm long (thick filaments 1.6 µm long; thin filaments 1.0 µm long from each Z line). The I band is:
- 1.8 µm
- 1.4 µm
- 1.6 µm
- 2.4 µm
Answer
(a) 1.8 µm
I band = sarcomere − A band = 3.4 − 1.6
- 3.
How many bones are there in the tarsals of one ankle?
- 11
- 5
- 7
- 9
Answer
(c) 7
Section B · short answer
- 4.
Name the three types of movement shown by cells of the human body.
Answer
Amoeboid (macrophages and leucocytes), ciliary (cilia in the trachea and fallopian tubes) and muscular (movement of limbs, jaws, tongue).
- 5.
A sarcomere is 2.6 µm long (thick filaments 1.6 µm long; thin filaments 1.0 µm long from each Z line). Find the lengths of the A band, the I band and the H zone.
Answer
A band 1.6 µm; I band 1 µm; H zone 0.6 µm
I = 2.6 − 1.6; H = 2.6 − 2 × 1.0
Section C · long answer
- 6.
Describe the structure of a skeletal muscle and its contractile proteins.
Answer
A muscle is made of bundles (fascicles) of muscle fibres, each a multinucleate cell with sarcoplasm and sarcoplasmic reticulum, packed with myofibrils. Myofibrils show light I bands (thin actin filaments) and dark A bands (thick myosin filaments); each I band is bisected by a Z line, and the middle of the A band is the H zone with the M line. Actin filaments have troponin and tropomyosin; myosin is made of meromyosins whose globular heads have ATPase activity and actin-binding sites.
Fresh sheets for your child
In the app, every Locomotion and Movement sheet is new: the app remembers the questions your child has already had and leaves them out. Print the sheet as a PDF, or use notebook mode and write the answers in a notebook.
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