Question 1

If you are ill and contract a fever, the portion of your brain called the _______ has generated a new set point for your body's temperature.

Accepted Answer

The answer of If you are ill and contract a...

Question 2

Compared with a planktonic protozoan, a sponge living in the ocean has the advantage of being able to

Accepted Answer

Sponges, unlike planktonic protozoans, have a structural advantage that allows them to capture prey while resisting the forces of waves. This is due to their sessile nature and specialized cells called choanocytes that help in trapping food particles from the water.

Question 3

Refer to the figure showing the results of an experiment on a ground squirrel.Experimenters used a probe to directly heat or cool the squirrel's hypothalamus and measured the animal's metabolic rate and body temperature in response to this manipulation.  When the hypothalamus was heated, the squirrel's metabolic rate and body temperature _______.

Accepted Answer

The answer of Refer to the figure showing the results...

Question 4

An adult human is 60 percent water; a third of this water is in extracellular fluid, and 20 percent of extracellular fluid is in the blood.If a person weighs 200 pounds, the weight of the interstitial fluid bathing that person's cells weighs approximately _______ pounds.

Accepted Answer

The answer of An adult human is 60 percent water;...

Question 5

Daily torpor is

Accepted Answer

Daily torpor is a form of regulated hypothermia that is found in small endothermic animals. It is a way for these animals to conserve energy when food is scarce or when external temperatures are low. During torpor, the animal's metabolic rate and body temperature decrease, allowing them to lower their energy expenditure.

Question 6

You are working in a lab and discover a hibernating animal with a mutation that does not allow it to develop brown fat.If this animal were in the wild, what would be the most severe problem it might face?

Accepted Answer

Brown fat is responsible for generating heat during hibernation and arousal from hibernation. Without brown fat, the animal would have difficulty raising its body temperature quickly, which could lead to increased vulnerability to predators or missed opportunities to forage for food.

Question 7

A sponge is an aquatic organism that brings its food in through pores using flagella on specialized cells to create an incurrent of water.This specialization in which cells have different functions within an organism is an advantage that is not possible in _______ organisms.

Accepted Answer

The answer of A sponge is an aquatic organism that...

Question 8

Which statement is true?

Accepted Answer

The answer of Which statement is true?
...

Question 9

Refer to the figure showing the results of an experiment on a ground squirrel.Experimenters used a probe to directly heat or cool the squirrel's hypothalamus and measured the animal's metabolic rate and body temperature in response to this manipulation.  A reasonable conclusion from these results is that the hypothalamus acts as a thermostat, controlling _______.

Accepted Answer

The answer of Refer to the figure showing the results...

Question 10

In order to survive, multicellular animals such as earthworms had to evolve methods ensuring that internal cells not in contact with the external environment were in contact with _______.

Accepted Answer

The answer of In order to survive, multicellular animals such...

Question 11

Hibernation is

Accepted Answer

Hibernation is thought to have evolved as an extension of the decrease in thermoregulatory set point that accompanies sleep, allowing animals to conserve energy during periods of cold temperatures and food scarcity.

Question 12

Macrophages engulf cellular debris, microbes, cancer cells, and foreign substances, so it is advantageous for them to be large, but their size is limited by the amount of _______ they have as they grow in size.

Accepted Answer

The answer of Macrophages engulf cellular debris, microbes, cancer cells,...

Question 13

Refer to the figure.  If you scrape your knuckle, you will damage tissue shown in A, called _______.

Accepted Answer

The answer of Refer to the figure.  If you...

Question 14

Refer to the figure showing the results of an experiment on a ground squirrel.Experimenters used a probe to directly heat or cool the squirrel's hypothalamus and measured the animal's metabolic rate and body temperature in response to this manipulation.  When the hypothalamus was cooled, the squirrel's metabolic rate and body temperature _______.

Accepted Answer

The answer of Refer to the figure showing the results...

Question 15

Refer to the figure.  Two tissues you would find in your brain are shown in _______.

Accepted Answer

The answer of Refer to the figure.  Two tissues...

Question 16

An adipose cell gets larger as it stores more lipids but is limited in how large it can get.A major reason for this is that as it gets larger,

Accepted Answer

As the adipose cell gets larger, its volume increases at a faster rate than its surface area. This means that the surface area-to-volume ratio decreases, making it more difficult for nutrients, oxygen, and waste products to be exchanged across the cell membrane. This limits the size of the cell because if it gets too large, it will not be able to meet its metabolic needs and will die.

Question 17

When people run, they sweat, which cools them as the sweat evaporates.Sweating is a(n) _______ (active/passive) process that generates heat in the process of dissipating heat.

Accepted Answer

The answer of When people run, they sweat, which cools...

Question 18

As part of a surveying expedition, you find a hummingbird with a loss-of-function mutation that prevents it from entering daily torpor.With all other variables the same, you would expect this hummingbird to _______ compared with a hummingbird that does not have this mutation.

Accepted Answer

Hummingbirds resort to daily torpor to conserve energy and survive periods of food scarcity. If a hummingbird is unable to enter daily torpor due to a loss-of-function mutation, it will use much more energy per day, leading to a higher chance of starvation.

Question 19

In an organ that secretes saliva, the tissue secreting the saliva is epithelial, and the tissue providing support for the organ is _______.

Accepted Answer

The answer of In an organ that secretes saliva, the...

Question 20

Refer to the figure.  Two tissues you would find in your lungs are shown in _______.

Accepted Answer

The answer of Refer to the figure.  Two tissues...

Quiz 39: Physiology, Homeostasis, and Temperature Regulation

If you are ill and contract a fever, the portion of your brain called the _______ has generated a new set point for your body's temperature.

Compared with a planktonic protozoan, a sponge living in the ocean has the advantage of being able to

An adult human is 60 percent water; a third of this water is in extracellular fluid, and 20 percent of extracellular fluid is in the blood.If a person weighs 200 pounds, the weight of the interstitial fluid bathing that person's cells weighs approximately _______ pounds.

Daily torpor is

You are working in a lab and discover a hibernating animal with a mutation that does not allow it to develop brown fat.If this animal were in the wild, what would be the most severe problem it might face?

A sponge is an aquatic organism that brings its food in through pores using flagella on specialized cells to create an incurrent of water.This specialization in which cells have different functions within an organism is an advantage that is not possible in _______ organisms.

Which statement is true?

In order to survive, multicellular animals such as earthworms had to evolve methods ensuring that internal cells not in contact with the external environment were in contact with _______.

Hibernation is

Macrophages engulf cellular debris, microbes, cancer cells, and foreign substances, so it is advantageous for them to be large, but their size is limited by the amount of _______ they have as they grow in size.

Refer to the figure. If you scrape your knuckle, you will damage tissue shown in A, called _______.

Refer to the figure. Two tissues you would find in your brain are shown in _______.

An adipose cell gets larger as it stores more lipids but is limited in how large it can get.A major reason for this is that as it gets larger,

When people run, they sweat, which cools them as the sweat evaporates.Sweating is a(n) _______ (active/passive) process that generates heat in the process of dissipating heat.

As part of a surveying expedition, you find a hummingbird with a loss-of-function mutation that prevents it from entering daily torpor.With all other variables the same, you would expect this hummingbird to _______ compared with a hummingbird that does not have this mutation.

In an organ that secretes saliva, the tissue secreting the saliva is epithelial, and the tissue providing support for the organ is _______.

Refer to the figure. Two tissues you would find in your lungs are shown in _______.