etea medical mcqs

Category: Biology etea medical mcqs

No.	Topics.	No.	Topics.
1.	1ST YEAR BIO RANDOM MCQs KP TEXT BOOK	2.	ACELLULAR LIFR
3.	BIOENERGETICS	4.	BIOLOGICAL MOLECULES
5.	Biotechnology	6.	CELL STRUCTURE & FUNCTION
7.	Circulation	8.	COORDINATION & CONTROL/ NERVOUS & CHEMICAL COORDINATION
9.	DIVERSITY AMONG ANTMALS (THE KTNGDOM ANIMALIA)	10.	ENZYMES
11.	EVOLUTION	12.	Form and Function in Plants
13.	Homeostasis ( Mainly Kidney Portion )	14.	INHERITANCE
15.	lmmunity	16.	PROKARYOTES (KTNGDOM MONERA)
17.	REPRODUCTION	18.	Respiration
19.	Respiratory system	20.	SUPPORT & MOVEMENT

A neuron’s resting potential is typically around:

+30 mV
0 mV
-70 mV
-90 mV

The re-establishment of the resting membrane potential after depolarization is known as:

Depolarization
Repolarization
Hyperpolarization
Threshold

The process by which a neuron’s membrane potential becomes less negative (more positive) is called:

Repolarization
Hyperpolarization
Depolarization
Refractory period

What is the primary role of microglia in the nervous system?

Produce myelin
Form CSF
Immune defense and waste removal
Support axons

Which type of glial cell provides structural and metabolic support for neurons in the CNS and helps form the blood-brain barrier?

Microglia
Ependymal cell
Astrocyte
Oligodendrocyte

Glial cells that form the myelin sheath in the peripheral nervous system are:

Oligodendrocytes
Astrocytes
Schwann cells
Microglia

Glial cells that form the myelin sheath in the central nervous system are:

Schwann cells
Astrocytes
Oligodendrocytes
Microglia

What is the main component of the myelin sheath, providing insulation?

Proteins
Lipids
Carbohydrates
Nucleic acids

Which of the following is NOT a type of glial cell?

Astrocyte
Oligodendrocyte
Neuron
Schwann cell

Which part of the neuron is responsible for generating the action potential if the threshold is reached?

Dendrite
Soma
Axon hillock
Axon terminal

The period immediately following an action potential during which a neuron cannot generate another action potential is called the:

Resting period
Hyperpolarization
Refractory period
Repolarization

During the depolarization phase of an action potential, which ions rapidly rush into the neuron?

Potassium ions
Chloride ions
Sodium ions
Calcium ions

The resting membrane potential of a neuron is primarily maintained by the activity of the:

Calcium channels
Sodium-potassium pump
Neurotransmitter release
Myelin sheath

A rapid, transient, all-or-none change in the membrane potential of a neuron that transmits a nerve impulse is an:

Resting potential
Graded potential
Action potential
Synaptic potential

Chemical messengers released at the synapse to transmit signals from one neuron to another are known as:

Hormones
Enzymes
Neurotransmitters
Ions

The specialized junction where communication occurs between two neurons or between a neuron and an effector cell is called a:

Dendrite
Axon hillock
Synapse
Myelin sheath

Neurons that form connections between other neurons, especially within the CNS, are typically called:

Sensory neurons
Motor neurons
Interneurons
Efferent neurons

Neurons that transmit sensory information from the periphery to the central nervous system are called:

Motor neurons
Efferent neurons
Sensory neurons
Interneurons

Which type of neuron carries motor commands from the central nervous system to muscles or glands?

Afferent neuron
Sensory neuron
Motor neuron
Association neuron

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