Question 1

Neurosecretory neurons

Accepted Answer

A)  release neurotransmitters. 
B)  release hormones. 
C)  are unable to conduct action potentials, unlike ordinary neurons. 
D)  both release neurotransmitters and are unable to conduct action potentials, unlike ordinary neurons. 
E)  both release hormones and are unable to conduct action potentials, unlike ordinary neurons.

Question 2

Which of the classes of hormones is derived from large preprohormones?

Accepted Answer

A)  peptides. 
B)  estrogen 
C)  steroids. 
D)  both (a) and (b) above. 
E)  all of the above

Question 3

At the end of repolarization, the newly opened channels for ____________________ ions close.

Accepted Answer

The answer of At the end of repolarization, the newly...

Question 4

All hormones

Accepted Answer

A)  are regulated by the hypothalamus. 
B)  initiate synthesis of new proteins. 
C)  are secreted by endocrine glands through ducts into the blood. 
D)  must combine with specific receptors on the target cells in order to exert their effects. 
E)  are produced in a gland and target cells in different tissues.

Question 5

Indicate whether the characteristics below apply to the endocrine system or the nervous system by writing the appropriate letter in the blank using the following answer code:
-Controls activities that require longer duration rather than speed.

Accepted Answer

A) applies to the endocrine system 
B) applies to the nervous system 
C) applies to both the endocrine and nervous systems

Question 6

Axon terminal possess ____________________ voltage-gated channels that when operational induce neurotransmitter release.

Accepted Answer

The answer of Axon terminal possess ____________________ voltage-gated channels that...

Question 7

Describe the electrical events that occur during the rising and falling phase of an action potential.

Accepted Answer

The answer of Describe the electrical events that occur during...

Question 8

Hydrophilic hormones exert their effects primarily by activating second-messenger systems within their target cells.

Accepted Answer

A) True 
 B)False

Question 9

Indicate the solubility characteristics of each of the classes of hormones by writing the appropriate letter in the blank using the following answer code:
-catecholamines

Accepted Answer

A) lipophilic (hydrophobic) 
B) hydrophilic (lipophobic)

Question 10

MATCHING: ART
  
The following questions refer to the accompanying diagram of an action potential.
Segments of the action potential are labeled A-D. Match the letters to the corresponding statements below.
-Slow depolarization to threshold due to stimulus

Accepted Answer

The answer of MATCHING: ART
  
The following questions refer...

Question 11

Metabolism of hormones always results in their inactivation.

Accepted Answer

A) True 
 B)False

Question 12

Indicate whether the characteristics below apply to the endocrine system or the nervous system by writing the appropriate letter in the blank using the following answer code:
-Releases factors such as CRF.

Accepted Answer

A) applies to the endocrine system 
B) applies to the nervous system 
C) applies to both the endocrine and nervous systems

Question 13

Indicate which characteristic applies to classical neurotransmitters and neuropeptides using the following answer code:
-released into the blood for delivery to site of action

Accepted Answer

A) applies to classical neurotransmitters 
B) applies to neuropeptides 
C) applies to both classical neurotransmitters and neuropeptides 
D) applies to neither classical neurotransmitters nor neuropeptides

Question 14

MATCHING: ART
  
The following questions refer to the accompanying diagram of an action potential.
Segments of the action potential are labeled A-D. Match the letters to the corresponding statements below.
-Potassium moving through voltage-gated channels

Accepted Answer

The answer of MATCHING: ART
  
The following questions refer...

Question 15

Endocrine responses occur more slowly and last longer than neural responses.

Accepted Answer

A) True 
 B)False

Question 16

The nodes of Ranvier are formed by the open patches of axon when oligodendrocytes wrap themselves "jelly roll fashion" around the axon.

Accepted Answer

A) True 
 B)False

Question 17

Peptide hormones cause changes in solute permeability or alter intracellular protein activity at their targets.

Accepted Answer

A) True 
 B)False

Question 18

The most common second messenger used by hydrophilic hormones is

Accepted Answer

A)  calcium. 
B)  cyclic AMP. 
C)  chromatin. 
D)  messenger RNA. 
E)  plasma proteins.

Question 19

Which of the following is responsible for the falling phase of an action potential?

Accepted Answer

A)  opening of Na+ gates 
B)  Na+-K+ pump restoring the ions to their original locations 
C)  greatly increased permeability to K+ 
D)  ATP-ase destroying the energy supply that was maintaining the action potential at its peak. 
E)  none of these answers.

Question 20

At the peak of an action potential,

Accepted Answer

A)  the electrical gradient for K+ tends to move this ion outward. 
B)  the concentration gradient for K+ tends to move this ion outward. 
C)  K+ permeability greatly increases. 
D)  two of these answers. 
E)  all of these answers.

Exam 4: Principles of Neural and Hormonal Communication

Neurosecretory neurons

Which of the classes of hormones is derived from large preprohormones?

At the end of repolarization, the newly opened channels for ____________________ ions close.

All hormones

Indicate whether the characteristics below apply to the endocrine system or the nervous system by writing the appropriate letter in the blank using the following answer code: -Controls activities that require longer duration rather than speed.

Axon terminal possess ____________________ voltage-gated channels that when operational induce neurotransmitter release.

Describe the electrical events that occur during the rising and falling phase of an action potential.

Hydrophilic hormones exert their effects primarily by activating second-messenger systems within their target cells.

Indicate the solubility characteristics of each of the classes of hormones by writing the appropriate letter in the blank using the following answer code: -catecholamines

MATCHING: ART The following questions refer to the accompanying diagram of an action potential. Segments of the action potential are labeled A-D. Match the letters to the corresponding statements below. -Slow depolarization to threshold due to stimulus

Metabolism of hormones always results in their inactivation.

Indicate whether the characteristics below apply to the endocrine system or the nervous system by writing the appropriate letter in the blank using the following answer code: -Releases factors such as CRF.

Indicate which characteristic applies to classical neurotransmitters and neuropeptides using the following answer code: -released into the blood for delivery to site of action

MATCHING: ART The following questions refer to the accompanying diagram of an action potential. Segments of the action potential are labeled A-D. Match the letters to the corresponding statements below. -Potassium moving through voltage-gated channels

Endocrine responses occur more slowly and last longer than neural responses.

The nodes of Ranvier are formed by the open patches of axon when oligodendrocytes wrap themselves "jelly roll fashion" around the axon.

Peptide hormones cause changes in solute permeability or alter intracellular protein activity at their targets.

The most common second messenger used by hydrophilic hormones is

Which of the following is responsible for the falling phase of an action potential?

At the peak of an action potential,