Question 1

The median preoptic nucleus communicates directly with the

Accepted Answer

A)  organum vasculosum of the lamina terminalis (OVLT). 
B)  lateral hypothalamus. 
C)  posterior pituitary. 
D)  zona incerta.

Question 2

Karen has recently completed a very successful diet program and is now concerned about maintaining her weight loss.One of the challenges she must face is the fact that

Accepted Answer

A)  nobody is ever successful in maintaining weight loss,because obesity is caused by your genes. 
B)  her lower level of fat will stimulate the release of lower levels of leptin,leading to increased hunger. 
C)  her lower level of fat will stimulate the release of higher levels of leptin,leading to increased hunger. 
D)  dieting has made her resistant to leptin,leading to increased hunger.

Question 3

What is the role of CART in the maintenance of anorexia nervosa?

Accepted Answer

The answer of What is the role of CART in...

Question 4

Why does it make sense to treat people with high blood pressure with low-sodium diets and diuretic drugs?

Accepted Answer

The answer of Why does it make sense to treat...

Question 5

Risk for hyperthermia is increased when a

Accepted Answer

A)  person has an existing problem with his or her immune system. 
B)  woman is approaching menopause. 
C)  person has a low thyroid condition. 
D)  person is using antibiotics.

Question 6

Hyponatremia results from

Accepted Answer

A)  low sodium levels. 
B)  high sodium levels. 
C)  failure to drink enough plain water. 
D)  frequent urination.

Question 7

The human blood supply makes up about _________ percent of the body's total fluids.

Accepted Answer

A)  2 
B)  7 
C)  13 
D)  26

Question 8

If for some reason your hypothalamus doesn't raise your core temperature when you are exposed to very cold temperatures,

Accepted Answer

A)  you will die of hypothermia. 
B)  you will die of hyperthermia. 
C)  your brainstem and spinal cord will attempt to raise your core temperature. 
D)  your temporal lobe will tell you to move to a warmer environment which will take care of the problem.

Question 9

Stuart was in a serious automobile accident and in addition to breaking several bones,he suffered a deep cut that was bleeding badly.As he waited for help to arrive,it is likely that Stuart was experiencing

Accepted Answer

A)  hyponatremia. 
B)  strong osmotic thirst. 
C)  strong hypovolemic thirst. 
D)  both osmotic and hypovolemic thirst.

Question 10

Monica had a serious case of the flu,with lots of vomiting and diarrhea.When she called the Health Center for advice,a nurse told her to

Accepted Answer

A)  drink as much plain water as possible. 
B)  drink sports drinks containing sodium instead of plain water. 
C)  avoid drinking anything until the vomiting and diarrhea stopped completely. 
D)  drink clear sugary soda pop instead of plain water.

Question 11

Electrolytes are

Accepted Answer

A)  all charged solutes. 
B)  solutes that do not carry an electrical charge. 
C)  positively charged solutes. 
D)  negatively charged solutes.

Question 12

The preoptic area (POA)contains

Accepted Answer

A)  no temperature-responsive neurons. 
B)  neurons that respond to any change in core temperature. 
C)  two types of neurons that respond to either increases or decreases in core temperature. 
D)  three types of neurons that respond to increases in temperature,decreases in temperature,or are temperature-insensitive.

Question 13

Animals stop eating on their own and must be force-fed following lesions of the

Accepted Answer

A)  zona incerta. 
B)  median prefrontal nucleus. 
C)  lateral hypothalamus. 
D)  ventromedial hypothalamus.

Question 14

Most excess sodium and water are excreted by

Accepted Answer

A)  the intestines. 
B)  the kidneys. 
C)  perspiring. 
D)  respiration.

Question 15

People who have maintained large weight losses for two to five years

Accepted Answer

A)  account for less than one percent of all dieters. 
B)  usually skip breakfast. 
C)  usually don't gain the weight back. 
D)  never go near a scale.

Question 16

Hyponatremia occurs when sodium levels are high,but fluid levels are low.

Accepted Answer

A) True 
 B)False

Question 17

Temperature regulation is managed by a

Accepted Answer

A)  single system in the hypothalamus. 
B)  single system in the spinal cord. 
C)  hierarchy of systems extending from the spinal cord to the hypothalamus. 
D)  hierarchy of systems extending from the medulla to the spinal cord.

Question 18

You have been hiking,and as night falls and the temperature drops,the first part of your temperature regulation system to be activated is probably your ________,which will trigger your _________ to make you shiver.

Accepted Answer

A)  spinal cord;skin receptors 
B)  skin receptors;hypothalamus 
C)  brainstem;hypothalamus 
D)  hypothalamus;skin receptors

Question 19

The subfornical organ communicates directly with the

Accepted Answer

A)  posterior pituitary. 
B)  lateral hypothalamus. 
C)  median preoptic nucleus. 
D)  zona incerta.

Question 20

Animals that maintain their core temperature though internal metabolic activity are known as

Accepted Answer

A)  endotherms. 
B)  ectotherms. 
C)  mesotherms. 
D)  cold-blooded animals.

Exam 9: Temperature Regulation,thirst,and Hunger