Biology Mcqs

Maximum speed of nerve impulse transmission is____________?

A. 100 m/sec
B. 110 m/sec
C. 120m/sec
D. 130 m/sec.

Which of the following has no central nervous system?

A. Hydra
B. Man
C. Planaria
D. Cockroach

Na+ -K+ ATPase pump is important for_______________?

A. Maintenance of resting potential
B. Massive out flux of K+ after depolarization
C. Recovery of resting potential
D. Conversion of resting potential into action potential

Number of pairs of cranial nerves is__________?

A. 10
B. 11
C. 12
D. 13

Normal action potential of a neuronal cell is ___________?

A. plus 50 mv
B. plus 60 mv
C. plus 70 mv
D. plus 80 mv

Insufficient secretion of iodothyroxine in adults causes____________?

A. Myxedema
B. Cretinism
C. Goiter
D. Exopthalmic goiter

Normal resting membrane potential of a neuron is_____________?

A. – 50 mv
B. – 60 mv
C. – 70 mv
D. – 80 mv

Insulin and glucagons are __________ in nature.

A. Protein
B. Amino acid derivative
C. Polypeptide
D. Steroid

Acromegaly is caused due to oversecretion of____________?

A. STH
B. TSH
C. ACTH
D. Thyroxin

At the induction of action potential opening of Na+ gate with influx of Na+ is a ___________ processes?

A. Active transport
B. Passive transport
C. Diffusion
D. none of these