The term for the death of brain tissue due to lack of blood flow is: MCQ with Answer and Explanation

The term for the death of brain tissue due to lack of blood flow is:
A. Embolism
B. Aneurysm
C. Myocardial infarction
D. Stroke
Answer: Option D
Solution (By JKSSB Mock Tests)
A stroke (cerebrovascular accident) occurs when blood supply to part of the brain is interrupted, causing tissue death. Myocardial infarction is heart attack, aneurysm is vessel ballooning, embolism is blockage by a traveling clot.

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Practice More Biology Questions

Question #1
The type of muscle tissue that is voluntary and striated is:
A. Cardiac muscle
B. Smooth muscle
C. Visceral muscle
D. Skeletal muscle

Correct Answer: Option D


Explanation:
Skeletal muscle is attached to bones, is under voluntary control, and has a striated appearance due to the arrangement of actin and myosin filaments. Smooth muscle (visceral) is non-striated and involuntary, found in internal organs. Cardiac muscle is striated but involuntary, found only in the heart. Skeletal muscles are multinucleated.

This question belongs to: Science Biology
Question #2
In which phase of mitosis does the nuclear envelope reform around the chromosomes?
A. Telophase
B. Anaphase
C. Metaphase
D. Prophase

Correct Answer: Option A


Explanation:
During telophase, the chromatids reach the poles, decondense, and the nuclear envelope reassembles around each set, forming two daughter nuclei. The spindle disappears. Prophase involves nuclear envelope breakdown, metaphase aligns chromosomes, and anaphase separates chromatids. Cytokinesis often overlaps with telophase, dividing the cytoplasm.

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Question #3
Which of the following statements about the lymphatic system is correct?
A. It circulates blood throughout the body.
B. The thymus is a secondary lymphoid organ.
C. It returns interstitial fluid to the bloodstream.
D. Lymph nodes produce red blood cells.

Correct Answer: Option C


Explanation:
The lymphatic system drains excess tissue fluid (lymph) back to the venous blood. Blood circulation is the cardiovascular system; lymph nodes filter lymph; thymus is a primary lymphoid organ.

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