Biology Mcqs

Grave’s disease is produced due to____________?

A. Undersecretion of thyroxin
B. Overproduction of thyroxin
C. Undersecretion of corticosteroids
D. Overproduction of corticosteroids

Cell membrane under resting conditions is impermeable to all the ions except_____________?

A. Na+
B. K+
C. Cl-
D. PO4-2

Maintenance of normal resting potential via movement of K+ inside the cell and na+ out is a/an ___________ process?

A. Active
B. Passive
C. Diffusional
D. None of these.

Type of neurons found exclusively in CNS are_____________?

A. Sensory neurons
B. Motor neurons
C. Associative neurons
D. None of these

A. Stomach
B. Liver
C. Pancreas
D. Duodenum

Which of the following statement about neuron is incorrect___________________?

A. They not only conduct impulses but also generate them
B. They are not the only cellular component of nervous system
C. They may show limited regenerative capabilities
D. Like all the living cell, when they mature and divide to form similar cells

All of the following are similarities between nervous and endocrine system except:_____________?

A. Produce chemical messengers
B. Release chemical messengers in extracellular space
C. Homestatic in function
D. Having slow but prolonged effects

Nissl’s granules are present in which part of the neuron_________________?

A. Axoplasm
B. Myelin sheath
C. Dendrite
D. Soma

Types of behaviour enabling pillbugs to reach moist area is___________?

A. Kinesis
B. Taxes
C. Instinct
D. Learning

____________ was first to propose an objective definition of instinct.

A. Thorpe
B. Darwin
C. Pavlov
D. Kohler