Animal Physiology II - Circulation System Quiz

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Questions and Answers

What is the main purpose of the circulatory system in animals?

To transport respiratory gases, nutrients, metabolic wastes, and hormones (correct)

To provide structural support and protection for internal organs

To maintain homeostasis and regulate body temperature

To facilitate muscle contractions and movement

Why is a circulatory system necessary in larger animals?

To facilitate muscle contractions and movement

To maintain homeostasis and regulate body temperature

To provide structural support and protection for internal organs

Because materials cannot be transported within the body by simple diffusion in larger animals (correct)

Which of the following is NOT a function of the circulatory system in animals?

Regulation of body temperature (correct)

Production of urine

Transport of respiratory gases

Transport of absorbed nutrients from the digestive system to other tissues

In small animals, why can materials be transported within the body by simple diffusion?

Because their surface area to volume ratio allows for effective diffusion Signup and view all the answers

What is the approximate time taken for a glucose molecule to diffuse 1 meter?

20 years Signup and view all the answers

Which of the following does NOT play a role in why animals require a circulatory system?

Enzyme production Signup and view all the answers

What is the main purpose of circulatory systems?

To overcome the slowness of diffusion through bulk transport Signup and view all the answers

Which organ is responsible for forcing and moving fluid through the body in the circulatory system?

Heart Signup and view all the answers

What do arteries do in the circulatory system?

Distribute blood to capillaries for supply to organs Signup and view all the answers

What is responsible for blood circulation through the body as a result of rhythmic contractions?

Forces imparted by the rhythmic contractions of the heart Signup and view all the answers

Which mechanism contributes to generating blood flow in the circulatory system?

Contraction of smooth muscles covering blood vessels Signup and view all the answers

What is the central circulation point in the circulatory system?

Heart Signup and view all the answers

What is responsible for returning blood from tissues to the heart?

Veins Signup and view all the answers

What facilitates transfer of materials between blood and tissues in the circulatory system?

Capillaries Signup and view all the answers

What is a common basic plan with similar functions in animals?

Fluid that carries transported molecules and cells through the circulatory system Signup and view all the answers

What differs among animals in terms of generating blood flow?

The relative contribution of mechanisms in generating blood flow Signup and view all the answers

Study Notes

Circulatory System in Animals

The main purpose of the circulatory system is to transport materials and oxygen throughout the body and remove waste products.

Necessity of Circulatory System

A circulatory system is necessary in larger animals because diffusion is not sufficient to transport materials over long distances.
In small animals, materials can be transported within the body by simple diffusion because the distance is shorter.

Functions of Circulatory System

The circulatory system does not function to digest food.
The main purpose of circulatory systems is to transport materials and oxygen throughout the body and remove waste products.

Heart and Blood Circulation

The heart is responsible for forcing and moving fluid through the body in the circulatory system.
Arteries carry oxygenated blood away from the heart to the rest of the body.
The heart is responsible for blood circulation through the body as a result of rhythmic contractions.
The mechanism of rhythmic contractions contributes to generating blood flow in the circulatory system.

Blood Flow and Return

The heart is the central circulation point in the circulatory system.
Veins are responsible for returning blood from tissues to the heart.
Capillaries facilitate the transfer of materials between blood and tissues in the circulatory system.

Universality of Circulatory System

The circulatory system is a common basic plan with similar functions in animals.
What differs among animals is the mechanism of generating blood flow.

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Description

Test your knowledge of the circulatory system with this quiz covering topics such as the general plan of the circulatory system, types of circulation, mammalian heart structure and function, pacemakers, blood vessels, control of circulation, comparative aspects, and the lymphatic system.