Recent Lessons

Show all results for ""

Feature Overview

Ace your exams with our all-in-one platform for creating and sharing quizzes and tests.

Quizzes

Create quizzes and tests automatically from your content using AI.

Flashcards

Automatically turn your notes into digital flashcards.

Share, Export & Embed

Share with classmates or export to Excel and your learning management system.

Stats & Reporting

Auto-grading quizzes and tests with detailed stats and reports.

Mobile Apps

The smarter way to study – wherever you are.

Pricing

Search...

CAIE Biology A-level: Gas Exchange and Mammalian Adaptations

18 Questions

0 Views

CAIE Biology A-level: Gas Exchange and Mammalian Adaptations

Choose a study mode

Play Quiz

Study Flashcards

Spaced Repetition

Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What enables maximum oxygen absorption in mammals during gas exchange?

Small surface area and low blood supply

Low surface area and high blood supply

Thick diffusion pathway and low blood supply

Large surface area and thin diffusion pathway (correct)

What is the function of the trachea in the mammalian gaseous exchange system?

To store oxygen for later use

To transport air from the lungs to the nose

To warm, humidify and filter the air we breathe (correct)

To exchange oxygen and carbon dioxide

Where does gas exchange occur in the mammalian respiratory system?

In the diaphragm

In the trachea

In the alveoli (correct)

In the bronchi

What is the importance of a steep concentration gradient in the alveoli?

It increases oxygen absorption Signup and view all the answers

What is the benefit of a large surface area in the alveoli?

It increases the rate of oxygen absorption Signup and view all the answers

What is the role of blood supply in the alveoli?

It increases the rate of oxygen absorption Signup and view all the answers

What is the main function of the ciliated epithelial cells in the trachea?

To move mucus up to the back of the throat to be swallowed Signup and view all the answers

What is the main difference between the bronchi and the bronchioles?

Bronchi have cartilage rings, while bronchioles do not Signup and view all the answers

What is the primary function of the goblet cells in the trachea?

To produce mucus that traps dust particles and bacteria Signup and view all the answers

What is the main function of the smooth muscle in the bronchioles?

To allow constriction to restrict air flow Signup and view all the answers

What is the main function of the trachea in the mammalian gaseous exchange system?

To carry air to the bronchi Signup and view all the answers

What is the primary gaseous exchange surface in humans?

Alveoli Signup and view all the answers

What is the primary site of gaseous exchange in humans?

Alveoli Signup and view all the answers

What is the characteristic of the walls of the alveoli?

One cell thick Signup and view all the answers

What is the direction of oxygen diffusion in the alveoli?

From alveoli into blood Signup and view all the answers

What is the approximate number of alveoli in each lung?

300 million Signup and view all the answers

What happens to the concentration of carbon dioxide in the alveoli during expiration?

It decreases Signup and view all the answers

What maintains the steep concentration gradient of oxygen in the alveoli?

Good blood supply Signup and view all the answers