Which of these are not neurohormones:
A.Acetylcholine, epinephrine, norepinephrine, somatostatin
B.Dopamine, serotonin, histamine, substance-P, sympathin
C.Thyroxine, gastrin, secretin, enterokrinin, cholecystokinin
D.All of these
Category: Nervous System Physiology Mcqs
The negative charges over complex organic molecules are neutralized by:
A.Potassium ions
B.Sodium ions
C.Chloride ions
D.None of these
Chemical transmission of nerve impulses from one neuron to the other or from neuron to muscle is done by:
A.Acetylcholine
B.Cholecystokinin
C.Cholesterol
D.ATP
The electric potential across membrane of each resting cell is:
A.Resting potential
B.Action potential
C.Membrane potential
D.None of these
In resting stage the axolemma is poorly permeable to Na+ but quite permeable to K+ and Cl- by:
A.10-20 times
B.20-30 times
C.50-60 times
D.50-100 times
Nerve impulse is in fact, a process which is associated with which of these phenomenon:
A.Electrical
B.Chemical
C.Electrochemical
D.Physical
When a foreign particle falls on the surface of our eye than it shows a reflex response during which:
A.Eyelids close
B.Eye waters
C.Both (a) & (b)
D.None of these
An impulse travels along the nerve fibre as a :
A.Self propagative wave of some electrochemical changes
B.Self propagative wave of mechanical changes
C.Self-propagative wave of thermal changes
D.Self propagative wave of none of these changes
Stimulation of heart through sympathetic nerve is a result of:
A.Release of acetylcholine
B.Release of adrenaline
C.Inhibition of acetylcholine
D.Inhibition of adrenaline
When sympathetic nerve supply to heart is completely cut off then heart rate will:
A.Increase
B.Decrease
C.Show no change
D.Show none of these
