Question 1

The organ that regulates the body's water balance is the

Accepted Answer

A)  bladder. 
B)  liver. 
C)  hypothalamus. 
D)  kidney. 
E)  heart. 
A)  bladder. 
B)  liver. 
C)  hypothalamus. 
D)  kidney. 
E)  heart.

Question 2

A group of different types of cells working together to perform a common function is a(n)

Accepted Answer

A)  cell. 
B)  tissue. 
C)  organ. 
D)  organ system. 
E)  All of the answers are correct. 
A)  cell. 
B)  tissue. 
C)  organ. 
D)  organ system. 
E)  All of the answers are correct.

Question 3

The hypothalamus is part of a homeostatic feedback loop that plays an important role in maintaining homeostasis in the human body.Which phrase best describes a negative feedback loop?

Accepted Answer

A)  a loop whose circuit output negatively affects the body 
B)  a loop whose circuit output brings the body back to a set point 
C)  a loop whose sensors decrease the output of the system 
D)  a loop whose sensors decrease the amount of input into the system 
E)  a loop whose circuit is incomplete. 
A)  a loop whose circuit output negatively affects the body 
B)  a loop whose circuit output brings the body back to a set point 
C)  a loop whose sensors decrease the output of the system 
D)  a loop whose sensors decrease the amount of input into the system 
E)  a loop whose circuit is incomplete.

Question 4

You observe a butterfly sitting on a sunny leaf and realize that it is sunning itself.You conclude that butterflies

Accepted Answer

A)  are endotherms. 
B)  are ectotherms. 
C)  use nonshivering thermogenesis. 
D)  are ectotherms and use nonshivering thermogenesis. 
E)  experience acclimatization and not homeostasis. 
A)  are endotherms. 
B)  are ectotherms. 
C)  use nonshivering thermogenesis. 
D)  are ectotherms and use nonshivering thermogenesis. 
E)  experience acclimatization and not homeostasis.

Question 5

Hiking Mt.Everest is a dangerous journey because _____.

Accepted Answer

A)  very little oxygen is available at higher elevations 
B)  humans risk freezing to death in extreme cold 
C)  humans become overheated at higher elevations 
D)  very little oxygen is available at higher elevations,and humans risk freezing to death in extreme cold 
E)  very little oxygen is available at higher elevations,and humans become overheated at higher elevations 
A)  very little oxygen is available at higher elevations 
B)  humans risk freezing to death in extreme cold 
C)  humans become overheated at higher elevations 
D)  very little oxygen is available at higher elevations,and humans risk freezing to death in extreme cold 
E)  very little oxygen is available at higher elevations,and humans become overheated at higher elevations

Question 6

How does brown fat contribute to thermoregulation in bats?

Accepted Answer

A)  by providing insulation to retain heat 
B)  by providing a highly vascularized tissue to release heat to the environment 
C)  by generating heat through shivering 
D)  by generating heat via cellular respiration in specialized mitochondria 
E)  by providing a highly vascularized tissue to release heat to the environment and by generating heat via cellular respiration in specialized mitochondria 
A)  by providing insulation to retain heat 
B)  by providing a highly vascularized tissue to release heat to the environment 
C)  by generating heat through shivering 
D)  by generating heat via cellular respiration in specialized mitochondria 
E)  by providing a highly vascularized tissue to release heat to the environment and by generating heat via cellular respiration in specialized mitochondria

Question 7

In all animals,there is no type of fat tissue that can

Accepted Answer

A)  quickly release glucose into the blood. 
B)  store energy. 
C)  insulate the body. 
D)  produce heat by nonshivering thermogenesis. 
E)  None of the answers are correct. 
A)  quickly release glucose into the blood. 
B)  store energy. 
C)  insulate the body. 
D)  produce heat by nonshivering thermogenesis. 
E)  None of the answers are correct.

Question 8

_____ is the maintenance of a relatively stable internal body temperature.

Accepted Answer

A)  Physiology 
B)  Homeoregulation 
C)  Thermoregulation 
D)  Metabolism 
E)  Homeostasis 
A)  Physiology 
B)  Homeoregulation 
C)  Thermoregulation 
D)  Metabolism 
E)  Homeostasis

Question 9

Vasodilation and vasoconstriction are the result of signals sent by what body structure?

Accepted Answer

A)  brain 
B)  heart 
C)  thyroid 
D)  hypothalamus 
E)  hypothyroid 
A)  brain 
B)  heart 
C)  thyroid 
D)  hypothalamus 
E)  hypothyroid

Question 10

The hypothalamus is NOT connected to _____.

Accepted Answer

A)  effectors 
B)  sensors 
C)  the endocrine system 
D)  the nervous system 
E)  the skeletal system 
A)  effectors 
B)  sensors 
C)  the endocrine system 
D)  the nervous system 
E)  the skeletal system

Question 11

Vasoconstriction

Accepted Answer

A)  lowers body temperature. 
B)  increases heart rate. 
C)  stimulates skeletal muscle activity. 
D)  stimulates brain activity. 
E)  conserves body heat. 
A)  lowers body temperature. 
B)  increases heart rate. 
C)  stimulates skeletal muscle activity. 
D)  stimulates brain activity. 
E)  conserves body heat.

Question 12

Several hundred types of cells make up the tissues found in humans and animals.All of these are tissues found in humans and animals EXCEPT _____.

Accepted Answer

A)  connective tissue 
B)  hardened tissue 
C)  epithelial tissue 
D)  muscle tissue 
E)  nervous tissue 
A)  connective tissue 
B)  hardened tissue 
C)  epithelial tissue 
D)  muscle tissue 
E)  nervous tissue

Question 13

In addition to thermoregulation,the human body also works to maintain which of these set points?

Accepted Answer

A)  blood clotting and energy level 
B)  blood glucose and blood clotting 
C)  blood pH and energy level 
D)  blood glucose and blood pH 
E)  energy level and blood pH 
A)  blood clotting and energy level 
B)  blood glucose and blood clotting 
C)  blood pH and energy level 
D)  blood glucose and blood pH 
E)  energy level and blood pH

Question 14

Negative feedback loops are common in maintaining homeostasis.Which statement is the best explanation of positive feedback loops?

Accepted Answer

A)  Positive feedback loops are used to make the body feel good quickly. 
B)  Positive feedback loops rapidly amplify the positive response to an input. 
C)  Positive feedback loops often have harmful effects on the body. 
D)  Positive feedback loops are a way to bring the body back to a set point. 
E)  Positive feedback loops are used to decrease the response of effectors. 
A)  Positive feedback loops are used to make the body feel good quickly. 
B)  Positive feedback loops rapidly amplify the positive response to an input. 
C)  Positive feedback loops often have harmful effects on the body. 
D)  Positive feedback loops are a way to bring the body back to a set point. 
E)  Positive feedback loops are used to decrease the response of effectors.

Question 15

The body's thermostat is

Accepted Answer

A)  the liver. 
B)  the hypothalamus. 
C)  the lymph system. 
D)  the endocrine system. 
E)  the kidney. 
A)  the liver. 
B)  the hypothalamus. 
C)  the lymph system. 
D)  the endocrine system. 
E)  the kidney.

Question 16

Thermoregulation maintains the human body at about

Accepted Answer

A)  98.6°F. 
B)  200°F. 
C)  100°F. 
D)  102°F. 
E)  87°F. 
A)  98.6°F. 
B)  200°F. 
C)  100°F. 
D)  102°F. 
E)  87°F.

Question 17

Shivering is the human body's way of producing heat when the internal temperature falls below a set point.This is an attempt to maintain _____.

Accepted Answer

A)  lung pressure 
B)  homeotherapy 
C)  nervous pressure 
D)  homeostasis 
E)  thermopressure 
A)  lung pressure 
B)  homeotherapy 
C)  nervous pressure 
D)  homeostasis 
E)  thermopressure

Question 18

The hypothalamus relies on _____ in the skin to signal internal and external changes in temperature.

Accepted Answer

A)  epithelial sensors 
B)  thermoreceptors 
C)  effectors 
D)  temperature gauges 
E)  epireceptors 
A)  epithelial sensors 
B)  thermoreceptors 
C)  effectors 
D)  temperature gauges 
E)  epireceptors

Question 19

Which of these is NOT a known physiological side effect of climbing at high altitudes?

Accepted Answer

A)  hypoxia 
B)  increased red blood cell production 
C)  increased barometric pressure 
D)  frostbite 
E)  physical and mental fatigue 
A)  hypoxia 
B)  increased red blood cell production 
C)  increased barometric pressure 
D)  frostbite 
E)  physical and mental fatigue

Question 20

A ______ feedback loop tends to _______ physiological response and is common in physiology.

Accepted Answer

A)  negative;amplify a 
B)  positive;amplify a 
C)  negative;decrease a 
D)  positive;maintain a constant 
E)  negative;maintain a constant 
A)  negative;amplify a 
B)  positive;amplify a 
C)  negative;decrease a 
D)  positive;maintain a constant 
E)  negative;maintain a constant

Exam 26: Overview of Physiology

The organ that regulates the body's water balance is the

A group of different types of cells working together to perform a common function is a(n)

The hypothalamus is part of a homeostatic feedback loop that plays an important role in maintaining homeostasis in the human body.Which phrase best describes a negative feedback loop?

You observe a butterfly sitting on a sunny leaf and realize that it is sunning itself.You conclude that butterflies

Hiking Mt.Everest is a dangerous journey because _____.

How does brown fat contribute to thermoregulation in bats?

In all animals,there is no type of fat tissue that can

_____ is the maintenance of a relatively stable internal body temperature.

Vasodilation and vasoconstriction are the result of signals sent by what body structure?

The hypothalamus is NOT connected to _____.

Vasoconstriction

Several hundred types of cells make up the tissues found in humans and animals.All of these are tissues found in humans and animals EXCEPT _____.

In addition to thermoregulation,the human body also works to maintain which of these set points?

Negative feedback loops are common in maintaining homeostasis.Which statement is the best explanation of positive feedback loops?

The body's thermostat is

Thermoregulation maintains the human body at about

Shivering is the human body's way of producing heat when the internal temperature falls below a set point.This is an attempt to maintain _____.

The hypothalamus relies on _____ in the skin to signal internal and external changes in temperature.

Which of these is NOT a known physiological side effect of climbing at high altitudes?

A ______ feedback loop tends to _______ physiological response and is common in physiology.

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A feedback loop tends to _ physiological response and is common in physiology.