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Q4(e):
Write true or false. If false change the statement so that it is true.
(e) Sternum is present on the ventral side of the body.
Solution :
Step 1: Evaluation of the Statement
The provided statement is: "Sternum is present on the ventral side of the body."
Anatomical analysis of the human skeletal system confirms that the sternum (commonly referred to as the breastbone) is a flat bone located in the center of the chest [Per Human Osteology]. In anatomical position, the ventral surface refers to the "front" of the body, while the dorsal surface refers to the "back" of the body. Since the sternum articulates with the costal cartilages of the ribs anteriorly, it is definitively positioned on the ventral side.
Verdict: True.
Step 2: Anatomical Visualization of the Thoracic Cage
Step 3: Justification and Physiological Context
- Positional Logic: The human skeletal system is organized into the axial and appendicular skeletons. The axial skeleton includes the skull, vertebral column, and the thoracic cage [Per Anatomical Standard Classification].
- Ventral Orientation: The sternum serves as the central anchor for the ribs. Because it faces the front of the body, it is categorized as a ventral structure [Per Standard Anatomical Terminology].
- Conclusion: There is no requirement for modification as the statement is factually accurate according to biological nomenclature.
Final Solution: True. The sternum is correctly identified as being located on the ventral side of the human body.
More Questions from Class 11 Biology Locomotion and Movement EXERCISES
- Q1: Draw the diagram of a sarcomere of skeletal muscle showing different regions.
- Q2: Define sliding filament theory of muscle contraction.
- Q3: Describe the important steps in muscle contraction.
- Q4(a): Write true or false. If false change the statement so that it is true. (a) Actin is present in thin filament
- Q4(b): Write true or false. If false change the statement so that it is true. (b) H-zone of striated muscle fibre represents both thick and thin filaments.
- Q4(c): Write true or false. If false change the statement so that it is true. (c) Human skeleton has 206 bones.
- Q4(d): Write true or false. If false change the statement so that it is true. (d) There are 11 pairs of ribs in man.
- Q5(a): Write the difference between : (a) Actin and Myosin
- Q5(b): Write the difference between : (b) Red and White muscles
- Q5(c): Write the difference between : (c) Pectoral and Pelvic girdle
- Q6: Match Column I with Column II : Column I Column II (a) Smooth muscle (i) Myoglobin (b) Tropomyosin (ii) Thin filament (c) Red muscle (iii) Sutures (d) Skull (iv) Involuntary
- Q7: What are the different types of movements exhibited by the cells of human body?
- Q8: How do you distinguish between a skeletal muscle and a cardiac muscle?
- Q9(a): Name the type of joint between the following:- (a) atlas/axis
- Q9(b): Name the type of joint between the following:- (b) carpal/metacarpal of thumb
- Q9(c): Name the type of joint between the following:- (c) between phalanges
- Q9(d): Name the type of joint between the following:- (d) femur/acetabulum
- Q9(e): Name the type of joint between the following:- (e) between cranial bones
- Q9(f): Name the type of joint between the following:- (f) between pubic bones in the pelvic girdle
- Q10(a): Fill in the blank spaces: (a) All mammals (except a few) have __________ cervical vertebra.
- Q10(b): Fill in the blank spaces: (b) The number of phalanges in each limb of human is __________
- Q10(c): Fill in the blank spaces: (c) Thin filament of myofibril contains 2 ‘F’ actins and two other proteins namely __________ and __________.
- Q10(d): Fill in the blank spaces: (d) In a muscle fibre $Ca^{++}$ is stored in __________
- Q10(e): Fill in the blank spaces: (e) __________ and __________ pairs of ribs are called floating ribs.
- Q10(f): Fill in the blank spaces: (f) The human cranium is made of __________ bones.
CBSE Solutions for Class 11 Biology Locomotion and Movement
Chapters in CBSE - Class 11 Biology
- The Living World
- Biological Classification
- Plant Kingdom
- Animal Kingdom
- Morphology of Flowering Plants
- Anatomy of Flowering Plants
- Structural Organisation in Animals
- Cell – The Unit of Life
- Biomolecules
- Cell Cycle and Division
- Transport in Plants
- Mineral Nutrition
- Photosynthesis
- Respiration in Plants
- Plant Growth and Development
- Digestion and Absorption
- Breathing and Exchange of Gases
- Body Fluids and Circulation
- Excretory Products and Elimination
- Neural Control and Coordination
- Chemical Coordination and Integration
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