Biology Mcqs

Which of the following is second largest part of the brain_______________?

A. Cerebrum
B. Cerebellum
C. Thalamus
D. Hypothalamus

Which of the following is largest part of brain?

A. Cerebrum
B. Cerebellum
C. Medulla oblongata
D. Thalamus

Which of the following is present inside the vertebral column______________?

A. Brain
B. Sal cord
C. Both of these
D. none of these.

Reflex actions below the neck are under control of____________?

A. Brain
B. Sal cord
C. Hypothalamus
D. none of these.

Central nervous system of man consists of______________?

A. Brain
B. Sal cord
C. Both of these
D. none of these

Which of the following ions are involved in the initiation of nerve impulse_______________?

A. Na+
B. K+
C. Fe
D. none of these

Under resting membrane potentials:

A. Outer surface of neuron is more positive
B. Inner surface of neuron is more positive
C. Both of these surfaces are equally positive
D. none of these.

What is the function of synapse________________?

A. To allow nerve impulse to move in backward direction
B. To decrease the speed of nerve impulse
C. To stop the nerve impulse
D. To provide cytoplasmic connection between neurons.

Microscopic gaps between the neuron endings are called__________?

A. Transmitters
B. Synapses
C. Pores
D. Nodes

Which of the following cytoplasmic extensions carry the message toward the cell body___________?

A. Dendrites
B. Axon
C. Both of these
D. none of these