The correct option is A-4, B-2, C-3, D-1
Explanation
Animal tissues are categorized based on cellular structure and function. Muscular tissue is specialized for contraction and movement, while nervous tissue is specialized for the transmission of electrochemical impulses. The specific morphology of these cells-such as shape, branching, and nucleation-distinguishes the different types.Analysis of Matches
- A. Striated Muscle (Skeletal Muscle): These are voluntary muscles attached to the skeletal system. Structurally, the muscle fibers are long, cylindrical, and unbranched. They are multinucleated and exhibit characteristic light and dark bands (striations). This matches with description 4.
- B. Smooth Muscle (Visceral Muscle): These are involuntary muscles located in the walls of hollow internal organs (e.g., blood vessels, stomach, intestine). The cells are spindle-shaped (fusiform), meaning they are thick in the middle and taper at both ends. They are unbranched and uninucleated. This matches with description 2.
- C. Cardiac Muscle: These are involuntary muscles found exclusively in the heart. The cells are cylindrical and branched. The branching network and intercalated discs allow for the synchronized contraction of the heart muscle. This matches with description 3.
- D. Neuron: The neuron is the fundamental unit of the nervous system. It is distinct from muscle tissue and consists of a cell body (cyton) containing the nucleus, with specialized extensions called the axon and dendrites for signal transmission. This matches with description 1.
Key Takeaway: Skeletal muscles are cylindrical and unbranched; Smooth muscles are spindle-shaped with pointed ends; Cardiac muscles are cylindrical and branched; Neurons are characterized by a cell body with axonal and dendritic extensions.