How do thermoreceptors help maintain homeostasis?

They detect changes in temperature and send signals that allow the body to adjust to heat or cold.

What is the purpose of negative feedback in endocrine regulation?

It prevents hormone levels from becoming excessive by reducing further hormone release once the target effect is achieved.

What role do valves play in the circulation of blood?

Valves prevent backflow, ensuring blood moves in one direction through the heart and veins.

What is the difference between systole and diastole?

Systole is ventricular contraction that pumps blood out, while diastole is ventricular relaxation that allows chambers to fill with blood.

What role do lymphatic vessels play in fluid balance?

They transport lymph from tissues back to the bloodstream, preventing edema.

How do B cells contribute to adaptive immunity?

B cells produce antibodies that specifically bind antigens, neutralizing pathogens or marking them for destruction.

How does the diaphragm contribute to ventilation?

Contraction of the diaphragm increases thoracic volume, reducing pressure and drawing air into the lungs; relaxation decreases volume, pushing air out.

How does hemoglobin facilitate oxygen transport?

Hemoglobin binds oxygen in the lungs and releases it in tissues, increasing blood oxygen-carrying capacity.

What functions does the small intestine serve in digestion and absorption?

It completes chemical digestion and absorbs nutrients through villi and microvilli into the bloodstream and lymph.

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Jessica Rivera

SCI220-06 StudyStack Set 2

Question	Answer
Which neuron structure receives most incoming signals?	Dendrites
How do thermoreceptors help maintain homeostasis?	They detect changes in temperature and send signals that allow the body to adjust to heat or cold.
What is the purpose of negative feedback in endocrine regulation?	It prevents hormone levels from becoming excessive by reducing further hormone release once the target effect is achieved.
What role do valves play in the circulation of blood?	Valves prevent backflow, ensuring blood moves in one direction through the heart and veins.
What is the difference between systole and diastole?	Systole is ventricular contraction that pumps blood out, while diastole is ventricular relaxation that allows chambers to fill with blood.
What role do lymphatic vessels play in fluid balance?	They transport lymph from tissues back to the bloodstream, preventing edema.
How do B cells contribute to adaptive immunity?	B cells produce antibodies that specifically bind antigens, neutralizing pathogens or marking them for destruction.
How does the diaphragm contribute to ventilation?	Contraction of the diaphragm increases thoracic volume, reducing pressure and drawing air into the lungs; relaxation decreases volume, pushing air out.
How does hemoglobin facilitate oxygen transport?	Hemoglobin binds oxygen in the lungs and releases it in tissues, increasing blood oxygen-carrying capacity.
What functions does the small intestine serve in digestion and absorption?	It completes chemical digestion and absorbs nutrients through villi and microvilli into the bloodstream and lymph.

Created by: jrivera_20

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