Question 1

Which of the following best describes double circulation in land vertebrates?

Accepted Answer

Blood passes through the heart twice during each complete circuit: once to the lungs and once to the rest of the body.

Question 2

Which animal is an example of having a single circulation system?

Accepted Answer

Fish

Question 3

A pulmocutaneous circuit is found in which type of animal, and what is its function?

Accepted Answer

Amphibians; it allows blood to be oxygenated through both the lungs and the skin.

Question 4

Which of the following correctly matches the animal group with the number of heart chambers?

Accepted Answer

Mammals: four chambers

Question 5

What is the main reason the left ventricle of the human heart is more muscular than the right ventricle?

Accepted Answer

It pumps blood to the entire body except the lungs, requiring higher pressure.

Question 6

Which of the following best describes the difference between arteries and veins?

Accepted Answer

Arteries carry blood away from the heart, veins carry blood toward the heart.

Question 7

Trace the path of a red blood cell starting from the left ventricle until it returns to the left atrium. Which of the following is the correct sequence?

Accepted Answer

Left ventricle → aorta → body tissues → superior/inferior vena cava → right atrium → right ventricle → pulmonary artery → lungs → pulmonary vein → left atrium

Question 8

Which structure prevents blood from flowing back into the right atrium from the right ventricle?

Accepted Answer

Tricuspid (right atrioventricular) valve

Question 9

Which of the following is a function of the chordae tendineae in the heart?

Accepted Answer

They anchor the atrioventricular valves to prevent prolapse during ventricular contraction.

Question 10

Which structure is shared by both the respiratory and digestive systems?

Accepted Answer

Pharynx

Question 11

What is the correct order of airflow from the mouth to the alveoli in the human respiratory system?

Accepted Answer

Mouth → pharynx → larynx → trachea → bronchi → bronchioles → alveoli

Question 12

How many lobes does the right lung have in humans?

Accepted Answer

Three

Question 13

Which of the following best describes the function of alveoli in the lungs?

Accepted Answer

They are the site of gas exchange between air and blood.

Question 14

Which animal phylum uses a closed circulatory system similar to that of humans?

Accepted Answer

Annelida

Question 15

Which of the following is NOT a structure of the upper respiratory system?

Accepted Answer

Bronchioles

Question 16

A patient has a blockage in the pulmonary artery. Which part of the circulatory system is directly affected?

Accepted Answer

Blood flow from the right ventricle to the lungs

Question 17

Which of the following best explains why amphibians can survive with a three-chambered heart?

Accepted Answer

They can exchange gases through both their lungs and skin, reducing the need for complete separation of blood.

Question 18

Which structure contracts to increase the volume of the thoracic cavity during inhalation?

Accepted Answer

Diaphragm

Question 19

Which valve prevents backflow of blood from the aorta into the left ventricle?

Accepted Answer

Aortic semilunar valve

Question 20

Which of the following best describes the function of the pericardium?

Accepted Answer

It protects and anchors the heart within the thoracic cavity.

Bio Lab: Chap 35 Review

Study Guide - Practice Questions

Study Guide - Flashcards