Biology
Human Physiology and Anatomy
2,235 Questions
Human physiology and anatomy explore the structural organization and biological functions of the human body and its systems. Questions focus on the primary roles of organs, hormones, cellular components, and developmental processes. These fundamentals are integral to medical entrance tests and general science sections.
Organ functionsHormone functionsImmune system rolesDigestive systemCellular functions
Human Physiology and Anatomy Questions
What is the primary function of the albumen (egg white)?
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To provide nourishment to the developing embryo
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To protect the embryo from mechanical damage
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To regulate the temperature of the egg
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To provide oxygen to the embryo
B
Correct answer
Explanation
The albumen is a thick, viscous fluid that surrounds the yolk and helps to protect the embryo from mechanical damage.
What is the role of the chalazae in the egg?
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To hold the yolk in place
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To provide nourishment to the developing embryo
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To regulate the temperature of the egg
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To provide oxygen to the embryo
A
Correct answer
Explanation
The chalazae are two thick, twisted strands of albumen that extend from the yolk to the shell and help to keep the yolk centered within the egg.
What is the primary function of the air cell in the egg?
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To provide oxygen to the developing embryo
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To regulate the temperature of the egg
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To provide a cushion for the embryo
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To allow for expansion and contraction of the egg during temperature changes
D
Correct answer
Explanation
The air cell is a small pocket of air located at the blunt end of the egg and allows for expansion and contraction of the egg during temperature changes.
What is the role of cholesterol in eggs?
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It is essential for brain development
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It helps to regulate hormone production
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It is a source of energy
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It is necessary for cell membrane formation
Correct answer
Explanation
Cholesterol in eggs plays a vital role in brain development, hormone regulation, energy production, and cell membrane formation.
What is the primary function of the eggshell?
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To protect the egg from mechanical damage
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To regulate the temperature of the egg
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To allow for gas exchange
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To provide calcium to the developing embryo
A
Correct answer
Explanation
The eggshell's primary function is to protect the egg from mechanical damage and prevent the entry of microorganisms.
What is the primary function of the respiratory system?
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Digestion of food
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Transportation of oxygen and carbon dioxide
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Regulation of body temperature
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Production of antibodies
B
Correct answer
Explanation
The respiratory system's main function is to facilitate the exchange of oxygen and carbon dioxide between the body and the environment.
What is the primary function of the trachea?
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Gas exchange
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Air filtration
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Transportation of oxygen
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Regulation of breathing
B
Correct answer
Explanation
The trachea's primary function is to filter and warm inhaled air before it reaches the lungs.
What is the primary function of the alveoli in the lungs?
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Gas exchange
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Air filtration
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Transportation of oxygen
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Regulation of breathing
A
Correct answer
Explanation
The alveoli are tiny air sacs in the lungs where gas exchange takes place.
What is the function of the pinna?
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To collect sound waves
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To protect the eardrum
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To amplify sound waves
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To help with balance
A
Correct answer
Explanation
The pinna is the visible part of the ear and its primary function is to collect sound waves and direct them into the external auditory canal.
What is the function of the Eustachian tube?
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To equalize pressure between the middle ear and the environment
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To drain fluid from the middle ear
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To help with hearing
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To protect the eardrum
A
Correct answer
Explanation
The Eustachian tube is a small channel that connects the middle ear to the back of the throat. Its primary function is to equalize pressure between the middle ear and the environment, which is important for proper hearing.
What is the function of the semicircular canals?
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To help with balance
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To transmit sound waves to the inner ear
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To protect the eardrum
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To equalize pressure between the middle ear and the environment
A
Correct answer
Explanation
The semicircular canals are three fluid-filled tubes in the inner ear that help with balance. They detect changes in head position and send signals to the brain, which helps maintain equilibrium.
What is the function of the ciliary body?
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Producing tears
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Controlling the size of the pupil
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Secreting aqueous humor
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Supporting the lens
C
Correct answer
Explanation
The ciliary body secretes aqueous humor, a fluid that fills the anterior chamber of the eye.
What is the role of plaque in tooth decay?
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It protects teeth from decay.
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It helps remove food particles from teeth.
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It contains beneficial bacteria.
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It traps food particles and bacteria on teeth.
D
Correct answer
Explanation
Plaque is a sticky film that forms on teeth and contains bacteria, food particles, and saliva.
What is the primary function of fluoride in preventing tooth decay?
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It strengthens tooth enamel.
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It neutralizes acids produced by bacteria.
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It kills bacteria in the mouth.
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It helps remove plaque from teeth.
A
Correct answer
Explanation
Fluoride helps prevent tooth decay by strengthening tooth enamel and making it more resistant to acids.
What is the role of saliva in preventing tooth decay?
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It helps neutralize acids produced by bacteria.
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It contains minerals that strengthen tooth enamel.
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It helps wash away food particles and bacteria.
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All of the above
D
Correct answer
Explanation
Saliva plays a crucial role in preventing tooth decay by neutralizing acids, strengthening tooth enamel, and washing away food particles and bacteria.