- Which of the following connective tissue fibers provides great tensile strength?
a) Elastic fibers
b) Reticular fibers
c) Collagen fibers
d) Fibrin fibers
Answer: c) Collagen fibers
Explanation: Collagen fibers are the strongest and most abundant fibers in connective tissue, providing great tensile strength to resist stretching and tearing forces.
- The cells responsible for the production of the extracellular matrix in bones are:
a) Osteoclasts
b) Chondrocytes
c) Osteoblasts
d) Fibroblasts
Answer: c) Osteoblasts
Explanation: Osteoblasts are responsible for synthesizing the extracellular matrix of bone tissue, including the deposition of minerals like calcium and phosphate to strengthen the bone.
- Which type of muscle tissue is responsible for moving bones and is under voluntary control?
a) Cardiac muscle
b) Smooth muscle
c) Skeletal muscle
d) Both smooth and cardiac muscles
Answer: c) Skeletal muscle
Explanation: Skeletal muscle is responsible for moving bones and is controlled voluntarily by the nervous system, allowing for conscious movements such as walking and lifting.
- Which of the following is NOT a function of epithelial tissue?
a) Protection
b) Absorption
c) Secretion
d) Transmission of impulses
Answer: d) Transmission of impulses
Explanation: Transmission of impulses is a function of nervous tissue, not epithelial tissue. Epithelial tissue serves functions like protection, absorption, secretion, and sensation.
- Which cells are responsible for the release of histamine during allergic reactions?
a) Mast cells
b) Fibroblasts
c) Chondrocytes
d) Osteoblasts
Answer: a) Mast cells
Explanation: Mast cells release histamine and other chemicals during allergic reactions, contributing to the inflammatory response and helping defend against pathogens.
- Which tissue type is involved in the formation of the blood-brain barrier?
a) Connective tissue
b) Epithelial tissue
c) Nervous tissue
d) Muscle tissue
Answer: b) Epithelial tissue
Explanation: The blood-brain barrier is formed by specialized epithelial cells (endothelial cells) that line the blood vessels in the brain, regulating the passage of substances from the bloodstream into the brain.
- What is the primary function of osteoclasts in bone tissue?
a) Bone formation
b) Bone resorption
c) Production of collagen
d) Storing fat
Answer: b) Bone resorption
Explanation: Osteoclasts are responsible for bone resorption, a process in which bone tissue is broken down, releasing minerals like calcium into the bloodstream for various body functions.
- Which of the following is NOT a characteristic of skeletal muscle?
a) Multinucleated
b) Striated appearance
c) Involuntary control
d) Attached to bones
Answer: c) Involuntary control
Explanation: Skeletal muscle is under voluntary control, meaning its movements are consciously regulated. It is also multinucleated, striated, and attached to bones to facilitate movement.
- Which type of connective tissue fiber forms a mesh-like network and is found in lymphoid organs?
a) Collagen fibers
b) Reticular fibers
c) Elastic fibers
d) Actin fibers
Answer: b) Reticular fibers
Explanation: Reticular fibers form a delicate, mesh-like network that provides structural support in lymphoid organs such as the spleen and lymph nodes.
- Which of the following structures is made up of elastic cartilage?
a) Intervertebral discs
b) Pinna of the ear
c) Articular cartilage of long bones
d) Menisci of the knee
Answer: b) Pinna of the ear
Explanation: Elastic cartilage provides flexibility and support to structures like the pinna of the ear and the epiglottis, allowing them to maintain their shape while being flexible.
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