Exchange Surfaces Flashcards
What is the primary function of exchange surfaces in organisms?
To facilitate the exchange of gases, nutrients, and waste products between the organism and its environment.
True or False: Exchange surfaces are typically thick and have a small surface area.
False
Fill in the blank: The efficiency of an exchange surface is increased by having a __________ surface area.
large
What is one characteristic of an effective exchange surface?
It is thin to provide a short diffusion distance.
Multiple choice: Which of the following is NOT a feature of exchange surfaces? A) Large surface area B) Thin walls C) High temperature D) Moist surfaces
C) High temperature
What role do alveoli play in the human respiratory system?
They provide a large surface area for gas exchange.
True or False: The presence of a rich blood supply is a feature of efficient exchange surfaces.
True
What is the purpose of moist surfaces in exchange surfaces?
To dissolve gases and facilitate diffusion.
Fill in the blank: In plants, __________ are the structures primarily involved in gas exchange.
stomata
Short answer: How do the lungs maximize gas exchange efficiency?
By having a large surface area, thin walls, and a rich blood supply.
Multiple choice: Which of the following is a feature of gills? A) They are located inside the body B) They have a large surface area C) They are not vascularized D) They are dry
B) They have a large surface area
What is Fick’s Law related to in the context of exchange surfaces?
It describes the relationship between surface area, concentration gradient, and diffusion rate.
True or False: A higher concentration gradient decreases the rate of diffusion.
False
Fill in the blank: The __________ is the primary site of gas exchange in the lungs.
alveolus
What is the significance of the surface area to volume ratio in exchange surfaces?
A higher ratio allows for more efficient exchange of materials.
Multiple choice: Which adaptation is NOT found in exchange surfaces? A) Ciliated cells B) Thick epithelium C) Vascularization D) Moist lining
B) Thick epithelium
Short answer: Describe one way in which fish gills are adapted for gas exchange.
They have numerous filaments and lamellae to increase surface area.
What type of transport is primarily involved in the exchange of gases across exchange surfaces?
Diffusion
True or False: The rate of diffusion is unaffected by temperature.
False
Fill in the blank: In insects, gas exchange occurs through small openings called __________.
spiracles
What is one way in which the structure of the small intestine aids in nutrient absorption?
It has villi and microvilli to increase surface area.
Multiple choice: Which of the following does NOT affect the efficiency of an exchange surface? A) Concentration gradient B) Thickness of the surface C) Surface area D) Color of the organism
D) Color of the organism
Short answer: Why is a rich blood supply important for exchange surfaces?
It helps maintain a steep concentration gradient for efficient exchange.
