Q: Which equation best describes the relationship between metabolic rate and body mass in animals?

$\text{Metabolic rate} \propto \text{body mass}^{3/4}$

Question 1

Which of the following best explains how long legs help a desert ant survive in its environment?

Accepted Answer

Long legs elevate the ant's body above the hot sand, reducing heat absorption and preventing overheating.

Question 2

Which equation correctly describes the relationship between a cell's surface area and volume, and why is this relationship important for exchange with the environment?

Accepted Answer

Surface area $\propto$ (volume)$^{2/3}$; as cells grow, volume increases faster than surface area, limiting exchange.

Question 3

Which adaptation allows complex multicellular animals to efficiently exchange materials with their environment?

Accepted Answer

Developing specialized, extensively branched or folded internal exchange surfaces.

Question 4

Which type of connective tissue is primarily responsible for binding epithelia to underlying tissues and holding organs in place?

Accepted Answer

Loose connective tissue

Question 5

Which of the following is a function of the circulatory system in mammals?

Accepted Answer

Internal transport of materials

Question 6

Which type of muscle tissue is responsible for voluntary movement in vertebrates?

Accepted Answer

Skeletal muscle

Question 7

An animal that maintains a constant internal temperature despite external fluctuations is called a:

Accepted Answer

Regulator

Question 8

Which process is primarily responsible for returning a variable to its set point in homeostasis?

Accepted Answer

Negative feedback

Question 9

Which of the following is an example of acclimatization?

Accepted Answer

A mountain climber developing increased red blood cell count after spending weeks at high altitude.

Question 10

Which of the following statements about endotherms and ectotherms is correct?

Accepted Answer

Endotherms maintain a stable body temperature through internal metabolic heat production.

Question 11

Which physical process is NOT a major way animals exchange heat with their environment?

Accepted Answer

Photosynthesis

Question 12

Countercurrent heat exchange is an adaptation that:

Accepted Answer

Transfers heat between fluids flowing in opposite directions, reducing heat loss.

Question 13

Which behavioral response would most likely help an ectothermic animal avoid overheating?

Accepted Answer

Moving to a shaded area during the hottest part of the day.

Question 14

Which equation best describes the relationship between metabolic rate and body mass in animals?

Accepted Answer

$	ext{Metabolic rate} \propto 	ext{body mass}^{3/4}$

Question 15

Which of the following is a physiological state that enables animals to save energy during periods of difficult environmental conditions?

Accepted Answer

Torpor

Question 16

During hibernation, what happens to the molecular components of the biological clock?

Accepted Answer

They stop oscillating.

Question 17

Which organ system is primarily responsible for body defense against infection and cancer in mammals?

Accepted Answer

Lymphatic/immune system

Question 18

Which tissue type is characterized by cells scattered throughout an extracellular matrix and provides support and binding for other tissues?

Accepted Answer

Connective tissue

Question 19

Which of the following is a real-world example of a negative feedback mechanism in human physiology?

Accepted Answer

Release of insulin to lower blood glucose after a meal

Question 20

Which adaptation is shared by both plant root hairs and vertebrate intestinal villi?

Accepted Answer

Increasing surface area for absorption

Basic Principles of Animal Form and Function (Chapter 40 Study Notes)

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