Chapter Exam

Chapter 9: Locomotion and Movement — Online MCQ Test

Q: Which type of muscle is found in the walls of internal organs like the stomach and intestine?

Answer: B. Smooth muscle — Smooth muscles are non-striated, involuntary muscles located in the walls of hollow visceral organs.

Q: The functional unit of contraction in a skeletal muscle is called a:

Answer: A. Sarcomere — A sarcomere is the segment between two Z-lines and is the basic contractile unit of a muscle fiber.

Q: During muscle contraction, which of the following bands remains unchanged in length?

Answer: C. A-band — The A-band contains thick filaments (myosin) and does not change in length during contraction.

Q: Compare the skeletal structure of an arm and a leg; which bone is analogous to the humerus?

Answer: C. Femur — The femur is the single bone in the thigh, analogous to the humerus in the upper arm.

ZOOLOGY · CLASS 11th · Tamil Nadu State Board

Practice Chapter 9: Locomotion and Movement with a free chapter-wise online MCQ test for Tamil Nadu State Board CLASS 11th ZOOLOGY. This chapter covers: This chapter covers muscle types skeletal muscle structure sliding filament theory and skeletal system architecture. Students study joints bone articulations and muscular-skeletal.... AI-generated questions from basic to board-exam level, with instant results and explanations.

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Chapter 9: Locomotion and Movement — Important Questions & Answers (FAQ)

Frequently asked questions from Tamil Nadu State Board CLASS 11th ZOOLOGY — Chapter 9: Locomotion and Movement, with answers and explanations. These are sample questions; the exam has its own separate question set.

Which type of muscle is found in the walls of internal organs like the stomach and intestine?

A. Skeletal muscle
B. Smooth muscle ✓
C. Cardiac muscle
D. Striated muscle

Answer: B. Smooth muscle
Smooth muscles are non-striated, involuntary muscles located in the walls of hollow visceral organs.

The functional unit of contraction in a skeletal muscle is called a:

A. Sarcomere ✓
B. Myofibril
C. Sarcolemma
D. Sarcoplasm

Answer: A. Sarcomere
A sarcomere is the segment between two Z-lines and is the basic contractile unit of a muscle fiber.

During muscle contraction, which of the following bands remains unchanged in length?

A. I-band
B. H-zone
C. A-band ✓
D. Sarcomere

Answer: C. A-band
The A-band contains thick filaments (myosin) and does not change in length during contraction.

Compare the skeletal structure of an arm and a leg; which bone is analogous to the humerus?

A. Fibula
B. Tibia
C. Femur ✓
D. Radius

Answer: C. Femur
The femur is the single bone in the thigh, analogous to the humerus in the upper arm.

During strenuous exercise, why do muscles experience fatigue?

A. Depletion of ATP and accumulation of lactic acid ✓
B. Excessive intake of calcium ions
C. Destruction of myosin filaments
D. Increased glycogen storage in muscles

Answer: A. Depletion of ATP and accumulation of lactic acid
Anaerobic respiration produces lactic acid, which lowers pH and interferes with enzyme activity, causing fatigue.

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