Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
BIO141
Final Exam
| Question | Answer |
|---|---|
| What is not a structural feature of a nearuon? | synaptic cleft |
| The part of a neuron that conducts impulses away from its cell body is called a(n) | axon |
| If one incoming impulse causes several outgoing nerve impulses, we know that there is a: | diverging circuit |
| The point at which an impulse from one nerve cell is communicated to another nerve cell is the: | synapse |
| The role of acetylcholinesterase is to: | destroy ACh a brief period after its release by the axonal endings. |
| Numerous nerve impulses arriving at a synapse at closely timed intervals exert a cumulative effect | Temporal summation |
| Stimulation of a postsynaptic neuron by many terminals at the same time. | Spatial summation |
| An insufficient stimulus | Subthreshold stiumulus |
| Any stimulus below this intensity will result in no response in a neuron. | Threshold stimulus |
| TorF The all-or-none phenomenon as applied to nerve conduction states that the whole nerve cell must be stimulated for conduction to take place. | FALSE |
| TorF Reflexes are rapid, automatic responses to stimuli. | TRUE |
| Efferent nerve fibers may be described as motor nerve fibers. | TRUE |
| Saltatory conduction occurs because of the presence of NaCl (salt) around the neuron. | FALSE |
| Neurotransmitters are releases at the _____. | Axonal terminal |
| The rough ER of the cell. ______ | Nissl bodies |
| Conducts impulses toward the nerve cell body. ______ | Dendrites |
| Conducts impulses away from the nerve cell body. ___________ | Axon |
| Period during which the neuron cannot respond to a second stimulus, no matter how strong. __________ | Absolute refractory period |
| The interior of the cell becomes less negative due to an influx of sodium ions. _________ | Depolarization |
| The specific period during which potassium ions diffuse out of the neuron due to a change in membrane permeability. _________ | Repolariation |
| Called a nerve impulse when transmitted. __________ | Action Potential |
| An exceptionally strong stimulus can trigger a response. ______ | Relative refractory period. |
| TorF Movement of the thigh are accomplished by muscles anchored to the pelvic girdle. | TRUE |
| TorF The insertion of the biceps brachii is on the radius. | TRUE |
| TorF The chewing muscle covering the ramus of the mandible is the buccinator. | FALSE |
| TorF A prime mover of the arm that acts in adduction would be the deltoid. | FALSE |
| TorF The soleus is a synergist of the gastrocnemius used in plantar flexion. | TRUE |
| TorF Muscles that help to maintain posture are often called synergist. | FALSE |
| TorF In order to propel food down the esophagus, the pharyngeal constrictor muscles would be use. | TRUE |
| TorF Plantar flexion at the ankle joint is accomplished by the tibialis anterior muscle. | FALSE |
| TorF The arrangement of a muscle's fascicles determines its range of motion and power. | TRUE |
| TorF Muscle power does not depend on the direction of the fascicles. | TRUE |
| TorF The calcaneal tendon (Achilles tendon) is the largest, strongest tendon in the body. | TRUE |
| TorF A pair of tweezers is a good example of a second-class lever. | FALSE |
| TorF Both first- and second-class levers operated at a mechanical disadvantage. | FALSE |
| TorF Although all skeletal muscles have different shapes, the fascicle arrangement of each muscle is exactly the same. | FALSE |
| TorF Muscles are only able to pull, they never push. | TRUE |
| TorF The anconeus muscle flexes the knee and stabilizes the patella. | FALSE |
| Muscle that opposes and reverses the action of another muscle. _________ | Antagonist |
| Muscle that stabilizes the origin of another muscle _______ | Fixator |
| Muscle that is primarily responsible for bringing about a particular movement. _______ | Agonist |
| Muscle that aids another by promoting the same movement. ________ | Synergist |
| TorF The force of muscle contraction is controlled by multiple motor unit summation or recruitment. | TRUE |
| TorF Eccentric contractions are much more forceful than concentric contractions. | TRUE |
| TorF A nerve cell and all the muscle cells that is stimulates are referred to as a motor end plate. | FALSE |
| TorF Peristalsis is characteristic of smooth muscle. | TRUE |
| TorF A contraction in which the muscle does not shorten but its tension increases is called isometric | TRUE |
| TorF During isotonic contraction, the heavier the load, the faster the velocity of contraction. | FALSE |
| TorF During isometric contraction, the energy used appears as movement. | FALSE |
| TorF One of the important functions of skeletal muscle is production of heat. | TRUE |
| TorF Oxygen debt refers to the oxygen required to make creatine phosphate. | FALSE |
| TorF Muscle contraction will always promote movement of body parts regardless of how they are attached. | FALSE |
| TorF Although there are no sarcomeres, smooth muscle still possesses thick and thin filaments. | TRUE |
| TorF Whereas muscle cells are electronically coupled, smooth muscle cells appear to be chemically couple by gap junctions. | FALSE |
| TorF Single-unit smooth muscle is found in the intestines. | TRUE |
| TorF A resting potential is caused by a difference in the concentration of certain ions inside and outside the cell. | TRUE |
| TorF The effect of the nurotransmiter on the muscle cell membrane is to modify its permeability properties temporarily. | TRUE |
| TorF When a muscle fiber contracts, the I bands diminish in size, the H zones disappear, and the A bands move closer together but do not diminish in length. | TRUE |
| TorF The more slowly a skeletal muscle is stimulated, the greater its exerted force becomes. | FALSE |
Created by:
508932065
Popular Biology sets