FREE AND STUDY GAMES ABOUT WEEK 7 PHYSIOLOGY

PDF Download

FREE AND STUDY GAMES ABOUT WEEK 7 PHYSIOLOGY

EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -60 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: The neurotransmitter that inhibits the conduction of pain impulses are Acetylcholine Enkephalins Dopamine Norepinephrine

Answer:

Enkephalins Question 2: The fastest nerve fibers in the body can conduct an impulse that is how much faster than the slowest fibers in the body Almost 50 times faster Almost 100 times faster Almost 300 times faster Almost 500 times faster

Answer:

Almost 300 times faster

Question 3: if the magnitude of the local depolarization surpasses a limit called the ___ voltage gated Na+ channels are stimulated to open Local potential Threshold potential Action potential Resting potential

Answer:

Threshold potential

Question 4: Which neuron could transmit a nerve impulse the fastest

A small diameter in around with out myelin A large diameter neuron without Myelin A large diameter neuron with Myelin A small diameter neuron with Myelin

Answer:

A large diameter neuron with Myelin Question 5: The active transport mechanism in the plasma membrane that transport sodium and potassium ions in opposite directions at a different rate is the Chloride channel Sodium potassium channel Ion Pump Sodium potassium pump

Answer:

Sodium potassium pump Question 6: In a myelinated neuron, the impulse can travel under the myelin between nodes of Ranvier True False

Answer:

TRUE

Question 7: The speed of a nerve impulse depends on the neurons resting potential True FALSE

Answer:

FALSE

Question 8: No impulse can be sent through a neuron

During the relative refractory Period.When the charge of the neuron is - 70 During the absolute refractory Period.When the stimulus is too strong

Answer:

During the absolute refractory. Period.

Question 9: During a relative refractory. Period.

The action potential cannot be initiated A resting potential exists The cell membrane is impermeable to Na+ and K+ The action potential can be initiated with a strong stimulus

Answer:

The action potential can be initiated with a strong stimulus

Question 10: Which chemicals allow neurons to communicate with another

Glial transmitters Sensory transmitters Neurotransmitters Neurofibrils

Answer:

Neurotransmitters

Question 11: True of a neuron with resting potential

cell membrane permeable to Na+, impermeable to K+ outer surface of the plasma membrane negative charge highest concentration of K+ is extracellular sodium pump has moved Na+ the outside PM

Answer:

sodium pump has moved Na+ the outside PM

Question 12: Stimulus gated channels open in response to

Sensory stimuli The influx of potassium Hyper polarization Both a and b

Answer:

Sensory stimuli

Question 13: A synapse consists of

A synaptic knob a synaptic cleft The plasma membrane of a postsynaptic neuron All of the above

Answer:

All of the above Question 14: nervous system, coding for the strength of a stimulus: Changes in the magnitude of action potential Changes in the length or duration of the action potential The frequency of nerve impulses An increase in the number of opening sodium channels

Answer:

The frequency of nerve impulses Question 15: Movement of the membrane potential away from zero below the usual RMP is called Depolarization repolarization hyperpolarization hyperpolarization

Answer:

hyperpolarization