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Tissues, Organs and Organ Systems
30 MCQs with Correct Answers & Explanations - For TLT, ECT, PST, JEST
Question 1 of 30
A group of similar cells performing the same function is called a:
- A. Organ
- B. Tissue
- C. Organ System
- D. Organism
Explanation: A tissue is defined exactly as a group of similar cells working together for one specific function, like muscle cells forming muscular tissue.
Question 2 of 30
What does the word 'tissue' originally mean?
- A. To break
- B. To weave
- C. To grow
- D. To cover
Explanation: "Tissue" comes from a French word meaning "to weave," since cells are woven together to form a functional unit.
Question 3 of 30
How many main types of tissue are found in animals?
- A. Two
- B. Three
- C. Four
- D. Five
Explanation: Animal tissues are divided into four types: Epithelial, Connective, Muscular, and Nervous.
Question 4 of 30
Which tissue forms the covering or lining of body surfaces?
- A. Muscular Tissue
- B. Nervous Tissue
- C. Epithelial Tissue
- D. Connective Tissue
Explanation: Epithelial tissue makes up skin and linings (mouth, blood vessels) and protects the body from injury, germs, and water loss. Its cells are tightly packed.
Question 5 of 30
Which tissue connects and supports other tissues and organs?
- A. Epithelial Tissue
- B. Connective Tissue
- C. Muscular Tissue
- D. Nervous Tissue
Explanation: Connective tissue (bone, cartilage, blood, fat) holds the body together. Its cells are loosely spaced with a matrix between them.
Question 6 of 30
Which of these is an example of connective tissue?
- A. Skin
- B. Bone
- C. Nerve
- D. Skeletal muscle
Explanation: Bone is a connective tissue that supports and protects the body; skin is epithelial, nerve is nervous, and skeletal muscle is muscular tissue.
Question 7 of 30
Which tissue is responsible for movement in the body?
- A. Epithelial Tissue
- B. Connective Tissue
- C. Muscular Tissue
- D. Nervous Tissue
Explanation: Muscular tissue can contract and relax, producing movement. It includes skeletal, smooth, and cardiac muscle.
Question 8 of 30
Which type of muscle is found only in the heart?
- A. Skeletal muscle
- B. Smooth muscle
- C. Cardiac muscle
- D. Voluntary muscle
Explanation: Cardiac muscle is unique to the heart and works involuntarily to pump blood continuously.
Question 9 of 30
Which muscle type controls voluntary movement and is attached to bones?
- A. Cardiac muscle
- B. Smooth muscle
- C. Skeletal muscle
- D. None of these
Explanation: Skeletal muscle is attached to bones and moves under our conscious control, such as walking or lifting.
Question 10 of 30
Which tissue is found in the brain, spinal cord, and nerves?
- A. Epithelial Tissue
- B. Connective Tissue
- C. Muscular Tissue
- D. Nervous Tissue
Explanation: Nervous tissue receives, processes, and sends signals, and is found in the brain, spinal cord, and nerves.
Question 11 of 30
What is the basic unit of nervous tissue called?
- A. Neuron
- B. Nephron
- C. Myocyte
- D. Osteocyte
Explanation: The neuron (nerve cell) is the basic functional unit of the nervous system, transmitting electrical and chemical signals.
Question 12 of 30
When two or more different tissues work together, they form a/an:
- A. Cell
- B. Tissue
- C. Organ
- D. Organism
Explanation: An organ is formed when different types of tissue combine to do a specific job, for example the heart.
Question 13 of 30
The heart is an organ made up of which tissues?
- A. Only muscular tissue
- B. Only nervous tissue
- C. Muscular, nervous, and connective tissue
- D. Only epithelial tissue
Explanation: Muscular tissue pumps blood, nervous tissue controls the heartbeat, and connective tissue holds the structure together.
Question 14 of 30
Which of the following is an example of an organ in plants?
- A. Nucleus
- B. Root
- C. Cell membrane
- D. Ribosome
Explanation: Root, stem, and leaf are plant organs made of different plant tissues working together. Nucleus, cell membrane, and ribosome are cell-level structures, not organs.
Question 15 of 30
When several organs work together to perform a major function, they form a/an:
- A. Tissue
- B. Organ
- C. Organ System
- D. Cell
Explanation: An organ system is a group of organs working together for a major life function, such as digestion.
Question 16 of 30
Which organs make up the digestive system?
- A. Heart, blood vessels
- B. Mouth, esophagus, stomach, intestines
- C. Brain, spinal cord, nerves
- D. Kidneys, bladder
Explanation: These organs work together to break down food and absorb nutrients, which is the job of the digestive system.
Question 17 of 30
Which system is responsible for breathing?
- A. Digestive System
- B. Respiratory System
- C. Excretory System
- D. Skeletal System
Explanation: The respiratory system, made of the nose, trachea, and lungs, takes in oxygen and releases carbon dioxide.
Question 18 of 30
Which system transports blood, oxygen, and nutrients throughout the body?
- A. Nervous System
- B. Muscular System
- C. Circulatory System
- D. Reproductive System
Explanation: The circulatory system, made of the heart, blood vessels, and blood, carries oxygen and nutrients to every part of the body.
Question 19 of 30
Which system controls and coordinates all body activities?
- A. Skeletal System
- B. Nervous System
- C. Excretory System
- D. Digestive System
Explanation: The nervous system, made of the brain, spinal cord, and nerves, sends and receives signals to coordinate all body functions.
Question 20 of 30
Which system provides structure, support, and protects internal organs?
- A. Muscular System
- B. Skeletal System
- C. Respiratory System
- D. Circulatory System
Explanation: Bones, cartilage, and joints of the skeletal system give the body its framework and protect vital organs, such as ribs protecting the heart and lungs.
Question 21 of 30
Which system works with the skeletal system to allow movement?
- A. Muscular System
- B. Nervous System
- C. Excretory System
- D. Reproductive System
Explanation: Muscles pull on bones, and together the muscular and skeletal systems produce body movement.
Question 22 of 30
Which system removes waste products from the body?
- A. Digestive System
- B. Circulatory System
- C. Excretory System
- D. Nervous System
Explanation: The excretory system, made of kidneys, ureters, bladder, and skin, removes waste materials from the body.
Question 23 of 30
Which system is responsible for producing offspring?
- A. Respiratory System
- B. Reproductive System
- C. Skeletal System
- D. Muscular System
Explanation: The reproductive system's function is producing offspring and continuing the species, and it differs between males and females.
Question 24 of 30
What is the correct order of organization from simplest to most complex?
- A. Organ, Tissue, Cell, Organism
- B. Cell, Tissue, Organ, Organ System
- C. Tissue, Cell, Organ System, Organ
- D. Organism, Organ, Tissue, Cell
Explanation: This is the fixed hierarchy: Cell to Tissue to Organ to Organ System to Organism, each level built from the smaller one before it.
Question 25 of 30
Which level of organization comes right after Tissue?
- A. Cell
- B. Organ
- C. Organ System
- D. Organism
Explanation: Following the hierarchy, tissues combine next to form organs.
Question 26 of 30
All organ systems working together form a/an:
- A. Cell
- B. Tissue
- C. Organ
- D. Organism
Explanation: The organism is the complete, highest level, a fully functioning living being made of all its organ systems working together.
Question 27 of 30
Which of these is a type of plant tissue responsible for growth?
- A. Permanent Tissue
- B. Meristematic Tissue
- C. Connective Tissue
- D. Nervous Tissue
Explanation: Meristematic tissue consists of actively dividing cells responsible for plant growth.
Question 28 of 30
Which plant tissue is specialized for functions like transport and protection?
- A. Meristematic Tissue
- B. Permanent Tissue
- C. Muscular Tissue
- D. Epithelial Tissue
Explanation: Permanent tissue cells have stopped dividing and are specialized for support, transport, and protection, such as xylem, phloem, and epidermis.
Question 29 of 30
Where is meristematic tissue mainly found in plants?
- A. In the flowers only
- B. At the tips of roots and shoots
- C. In the fruit only
- D. In dead cells
Explanation: Meristematic tissue is located at growing points, the root tips and shoot tips, where active cell division drives plant growth.
Question 30 of 30
Which two plant tissues are responsible for transport of water and food?
- A. Xylem and Phloem
- B. Epidermis and Cortex
- C. Meristem and Cambium
- D. Root and Shoot
Explanation: Xylem transports water and minerals upward from roots, while phloem transports food made in leaves to the rest of the plant. Both are types of permanent tissue.
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