Animal Locomotion Mechanisms Practice Questions
19 free Animal Locomotion Mechanisms practice questions for the NCERT Biology. Tap an option to answer — you get instant feedback, the correct answer, and a detailed explanation for every question.
Which of the following is a characteristic of Amoeboid movement seen in specialized cells of the human body?
- A It is effected by pseudopodia and protoplasm streaming
- B It is facilitated by the coordinated beating of the cilia
- C It requires the presence of a flagellum
- D It is only found in lower invertebrates
Correct answer: It is effected by pseudopodia and protoplasm streaming
Amoeboid movement occurs through the formation of pseudopodia via cytoplasmic streaming. In humans, macrophages and leucocytes exhibit this type of movement to navigate through tissues.
Cytoskeletal elements like microfilaments are primarily involved in which type of movement?
- A Amoeboid movement
- B Ciliary movement
- C Muscular movement
- D Flagellar movement
Correct answer: Amoeboid movement
Microfilaments, mainly composed of actin, are the cytoskeletal elements associated with amoeboid movement. They drive the protoplasmic streaming that forms pseudopodia, unlike muscular movement, which relies on actin-myosin interactions within muscle fibers.
In the human respiratory tract, the removal of dust particles and foreign substances is facilitated by:
- A Muscle movement
- B Amoeboid movement
- C Ciliary movement
- D Flagellar movement
Correct answer: Ciliary movement
The epithelium of the trachea is lined with cilia. Ciliary movement coordinated in a specific direction helps push out trapped dust particles and mucus from the respiratory passage.
Passage of ova through the female reproductive tract is facilitated by:
- A Flagellar movement
- B Amoeboid movement
- C Ciliary movement
- D Fluid pressure
Correct answer: Ciliary movement
The fallopian tubes are lined with ciliated epithelium. The rhythmic beating of these cilia helps move the non-motile ovum toward the uterus.
Which of the following movements is responsible for the swimming of spermatozoa?
- A Flagellar movement
- B Ciliary movement
- C Amoeboid movement
- D Peristaltic movement
Correct answer: Flagellar movement
Spermatozoa possess a flagellum whose whip-like lashing movement provides propulsion. Flagellar movement is also seen in protozoans like Euglena for locomotion.
The maintenance of water current in the canal system of sponges is a result of:
- A Muscular contractions
- B Ciliary beating
- C Amoeboid streaming
- D Flagellar movement
Correct answer: Flagellar movement
Choanocytes (collar cells) in sponges have flagella. The constant movement of these flagella creates and maintains the water current essential for nutrition and respiration.
Movement of our limbs, jaws, and tongue primarily requires which type of movement?
- A Ciliary
- B Amoeboid
- C Flagellar
- D Muscular
Correct answer: Muscular
Muscular movement is used for tasks requiring significant force and coordination of the skeleton. Muscles have unique properties like contractility and extensibility that facilitate these movements.
About what percentage of the body weight of a human adult is contributed by muscles?
- A 40-50 percent
- B 20-30 percent
- C 60-70 percent
- D 10-20 percent
Correct answer: 40-50 percent
Muscles are a specialized tissue of mesodermal origin. In an average human adult, they make up approximately 40 to 50 percent of the total body weight.
Based on their location, muscles are classified into three types. Which of the following is NOT one of them?
- A Skeletal muscles
- B Visceral muscles
- C Cardiac muscles
- D Textured muscles
Correct answer: Textured muscles
The three standard classifications of muscles based on location and appearance are skeletal (striated/voluntary), visceral (smooth/involuntary), and cardiac.
Skeletal muscles are also known as voluntary muscles because:
- A They are under voluntary control of the nervous system
- B They are under the control of the autonomic nervous system
- C They function without conscious effort
- D They are found in the walls of internal organs
Correct answer: They are under voluntary control of the nervous system
Skeletal muscles are closely associated with the skeletal components of the body. Since their actions can be consciously controlled by the somatic nervous system, they are termed voluntary muscles.
Which muscle type is found in the inner walls of hollow visceral organs like the alimentary canal?
- A Striated muscles
- B Smooth muscles
- C Skeletal muscles
- D Heart muscles
Correct answer: Smooth muscles
Visceral muscles, or smooth muscles, do not exhibit any striations and are involuntary. They assist in the transportation of food through the digestive tract and gametes through the genital tract.
A characteristic feature of cardiac muscles is that they are:
- A Voluntary and non-striated
- B Involuntary and striated
- C Voluntary and striated
- D Involuntary and non-striated
Correct answer: Involuntary and striated
Cardiac muscles are the muscles of the heart. While they appear striated (like skeletal muscles) under the microscope, their function is involuntary and controlled by the autonomic nervous system.
Each organized skeletal muscle is made of a number of muscle bundles called:
- A Fascial sheath
- B Fascicles
- C Fasciculi
- D Both b and c
Correct answer: Both b and c
Skeletal muscles consist of bundles of muscle fibers known as fascicles or fasciculi. These bundles are held together by a common collagenous connective tissue layer called fascia.
The plasma membrane lining the muscle fiber is called the:
- A Sarcoplasm
- B Sarcolemma
- C Sarcoplasmic reticulum
- D Sarcomere
Correct answer: Sarcolemma
The sarcolemma is the specialized plasma membrane that surrounds a muscle fiber. It encloses the sarcoplasm, which contains multiple nuclei.
Muscle fibers are considered 'syncytium' because they:
- A Contain a single large nucleus
- B Lack a nucleus entirely
- C Contain many nuclei in the sarcoplasm
- D Are formed by the fusion of nerve cells
Correct answer: Contain many nuclei in the sarcoplasm
During development, muscle fibers are formed by the fusion of many individual cells (myoblasts). This results in a multinucleated state, which is termed a syncytium.
The parallelly arranged filaments in the sarcoplasm of a muscle fiber are called:
- A Myofilaments
- B Myofibrils
- C Fascia
- D Both a and b
Correct answer: Both a and b
Muscle fibers contain a large number of parallelly arranged filaments called myofilaments or myofibrils. These give the muscle its characteristic striated appearance due to the distribution of actin and myosin.
The 'striated' appearance of a myofibril is due to the distribution pattern of which two proteins?
- A Troponin and Tropomyosin
- B Actin and Myosin
- C Desmin and Titin
- D Collagen and Elastin
Correct answer: Actin and Myosin
The dark and light bands seen in skeletal muscle are due to the presence of two contractile proteins: Actin (thin filament) and Myosin (thick filament).
Which of the following is true for the 'I-band' (Isotropic band) in a myofibril?
- A It contains only Myosin
- B It contains only Actin
- C It contains both Actin and Myosin
- D It is the dark band
Correct answer: It contains only Actin
The I-band or light band contains actin filaments. The A-band or dark band (Anisotropic band) contains myosin filaments, though parts of it overlap with actin.
Locomotion requires a perfect coordinated activity of which three systems?
- A Muscular, Skeletal, and Neural
- B Digestive, Muscular, and Respiratory
- C Skeletal, Vascular, and Neural
- D Muscular, Endocrine, and Skeletal
Correct answer: Muscular, Skeletal, and Neural
For effective locomotion (displacement from one place to another), the muscular system provides the force, the skeletal system provides the leverage, and the neural system provides the signals and coordination.