Multiple Choice Section

Choose the response which best completes the following statements or answers the following questions.

1.  A portion of a nervous system is illustrated in the diagram. Structure X represents  (1.) an effector  (2.) a neuron  (3.) a red blood cell  (4.) a white blood cell

2.    Which part of the human central nervous system is correctly paired with its function?  (1.) spinal cord - coordinates learning activities  (2.) cerebrum - serves as the center for memory and reasoning  (3.)  medulla - maintains muscular coordination  (4.) cerebellum -- serves as the center for reflex actions

3.    In the human nervous system, synapses are located directly between  (1.) dendrites and axons  (2.) cytons and axons  (3.) terminal branches and dendrites  (4.) axons and terminal branches

4.   The portion of the brain directly involved with coordinating voluntary motion or voluntary motor responses is the (1.) cerebrum 
(2.) cerebellum  (3.) spinal cord  (4.) medulla

5.    When a child runs to his mother after hearing a clap of thunder, the clap of thunder would serve the nervous system role of acting as a(n) (1.) stimulus  (2.) response  (3.) effector  (4.) none of these

6. A change in the external or internal environment of an organism is known as  1. response 2. an impulse 3. a synapse
4. a stimulus

7. Adding one drop of dilute hydrochloric acid to the water surrounding a hydra caused the hydra to contract. The acid acted as   1. a response
2. a stimulus 3. a neurotransmitter 4. an impulse

8.  Which statement describes a relationship between the human cells illustrated in the diagrams ?  (1.) B may cause D to contract.  (2.) B is used to repair C.  (3.) C transports oxygen to A.  (4.) A is produced by D.

9.  The diagram represents a neuron. Which number indicates the area where a stimulus is detected and an electrochemical impulse is conducted to the cyton?  (1.) 1  (2.) 2  (3.) 3  (4.) 4

10.   A change that initiates an electrochemical message along a neuron is known as  (1.) a stimulus  (2.) a response  (3.) an impulse  (4.) a synapse

11. Which is an activity controlled primarily by the cerebellum? (1.) maintaining balance (2.) breathing (3.) regulating your heartbeat (4.) thinking during this little quizzy poo

12.  Which substances are secreted at the endings of nerve cells?  1.  antibodies   2.  antigens   3.  neurotransmitters   4.  lipids

13.  The diagram below represents the functional unit of a nervous system.




Which letter indicates a structure that secretes a neurotransmitter? 1. A 2. B 3. C 4. D

14.  To communicate between cells, many multicellular animals use
1. nerve signals and respiratory gases  2. respiratory gases and hormones
3. bones and muscles  4. nerve signals and hormones

15.  One similarity between cell receptors and antibodies is that both
1. are produced by nerve cells     2. are highly specific in their actions
3. slow the rates of chemical reactions    4. are involved in digestion

16.  Hormones and secretions of the nervous system are chemical messengers that
1. store genetic information    2. carry out the circulation of materials
3. extract energy from nutrients    4. coordinate system interactions

Base your answers to the questions 17 and 18 on the diagram below and your knowledge of biology.



17.  Which statement best describes the diagram?   (1.) Nerve cell X is releasing receptor molecules.
(2.) Nerve cell Y is signaling nerve cell X.   (3.) Nerve cell X is attaching to nerve cell Y.
(4.) Nerve cell Y contains receptor molecules for substance A.

18.  A drug is developed that, due to its molecular shape, blocks the action of substance A.
       Which shape would the drug molecule most likely resemble?

19.  A process that occurs in the human body is represented in the diagram.


Which statement is most closely associated with the diagram?  1. Small molecules are obtained from large molecules during digestion.
2. Certain molecules are replicated by means of a template. 3. Receptor molecules play an important role in communication between cells.
4. Energy from nutrients is utilized for waste disposal.

20. Which substances are found on cell surfaces and respond to nerve and hormone signals? (1.) starches and simple sugars
(2.) subunits of DNA  (3.) vitamins and minerals   (4.) receptor molecules

Correctly complete the following statements. 

1.  Most axons are covered with a(n) ____________________ which aids impulse  transmission by improving electrical insulation.

2.  The gap between two adjacent neurons is called a(n) _______________.

3.  Nerve impulses are basically ________________ in nature.

4.  The longest dendrite of a neuron which carries the impulse from the cell body is called the _______________.

5.  The cell body of a neuron is called its _______________.

6.  The part of a nerve cell or neuron which releases neurotransmitters are its _______________.

7.  The branches of nerve cells are known as _______________.

8.  The portion of the brain which controls involuntary activities such as blood pressure and breathing is the _______________.

9.  A muscle or gland which responds to a message carried to it by motor neurons is called a(n) _______________.

10. The portion of the brain which controls the thought processes is the _______________.

11. A change in the surroundings or the environment that triggers a nerve impulse is called a(n) _______________.

12. The portion of the brain which coordinates motor activities is the _______________.

Short Answer Section

In the space provided below, describe all of the major events involved in the transmission of a nerve impulse across a synapse in three or more steps.

Identify each of the numbered structures on the neuron diagram at the right.

Click here to view the answers to this nervous practice quiz