MCQs Archive - Page 1003 of 1097

What term describes the basic biological unit of heredity, made of DNA, that carries instructions for a specific inherited trait?

AEnzyme

BChromosome

CGene

DHormone

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What are the specialized proteins called that the immune system produces to specifically target and neutralize particular pathogens?

ANeurotransmitters

BEnzymes

CHormones

DAntibodies

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What is a primary function of the human lymphatic system?

ADraining excess fluid from tissues and supporting immune defense

BRegulating heart rate

CPumping oxygenated blood to the lungs

DProducing digestive enzymes

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What is the primary function of the tiny blood vessels called capillaries?

AProducing new red blood cells

BPumping blood at high pressure

CAllowing the exchange of oxygen, nutrients, and waste between blood and body tissues

DStoring large reserves of blood

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What is the name of the largest artery in the human body, which carries oxygenated blood directly from the heart?

APulmonary artery

BCoronary artery

CAorta

DVena cava

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What is the main functional difference between arteries and veins in the circulatory system?

AArteries carry blood away from the heart, while veins carry blood toward the heart

BOnly arteries contain valves

CVeins carry blood away from the heart, while arteries carry blood toward the heart

DArteries and veins carry out exactly the same function

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Which of the following correctly lists the three main types of muscle tissue found in the human body?

ARed, white, and pink muscle

BVoluntary, striated, and elastic muscle

CFast, slow, and medium muscle

DSkeletal, smooth, and cardiac muscle

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How do sweat glands in human skin primarily help regulate body temperature?

ABy releasing sweat that cools the body as it evaporates from the skin

BBy slowing down blood flow to the skin

CBy producing heat directly

DBy absorbing heat from the surrounding air

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Which structure within the inner ear converts sound vibrations into nerve signals that the brain can interpret?

ACochlea

BEardrum

COuter ear canal

DEustachian tube

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Which of the following lists the five traditionally recognized basic human senses?

ASight, hearing, smell, taste, and touch

BSight, balance, hunger, thirst, and pain

CSmell, taste, balance, memory, and touch

DHearing, touch, temperature, hunger, and sight

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