Biology MCQs For Entry Test Preparation (Chapter Wise) || Important Biology MCQs For Entry Test || MDCAT Biology Test Online Preparation MCQs with Answers



The effectors of the motor neurons are:

a)       Bones

b)      Skin

c)       Brain

d)      Muscle and glands  

How many times pain receptors are more than heat receptors?

a)       200 times 

b)      270 times

c)       340 times 

d)      450 times

When an impulse reaches a synaptic knob, the synaptic vesicles fuse with the?

a)       Postsynaptic membrane

b)      Presynaptic membrane

c)       Neurotransmitter

d)      Synaptic cleft



Neurotransmitters are released from the?

a)       Cell body

b)      Dendron

c)       Axon ending

d)      Synaptic membrane

Which one of the following is a neurotransmitter?

a)       Acetylcholine

b)      Dopamine

c)       Adrenaline

d)      All of the above

Speed of the impulse conduction depends upon the?

a)       Diameter of axon

b)      Myelinated sheath

c)       Both a and b

d)      None



The spinal cord is an extension of?

a)       Forebrain

b)      Skull

c)       Medulla

d)      Both a and b

Lower most part of the brain is?

a)       Cerebrum

b)      Cerebellum

c)       Medulla

d)      Spinal cord

Which one of the following is not a part of the brain stem?

a)       Medulla

b)      Cerebellum

c)       Cerebrum

d)      Thalamus



Tens of billions of neurons are present in?

a)       Cerebrum

b)      Medulla

c)       Corpus callosum

d)      Cerebral cortex

The spinal cord is an extension out of?

a)       Medulla

b)      Cerebrum

c)       Skull

d)      Forebrain

The total number of peripheral nerves is?

a)       66

b)      76

c)       86

d)      96



Hormones _____ the chemical reactions?

a)       Accelerates

b)      Starts

c)       Regulates

d)      Stops

Which of the following are known as ducted glands?

a)       Endocrine

b)      Exocrine

c)       Both

d)      None

Secretion of exocrine glands is?

a)       Enzyme

b)      Water

c)       Mucous

d)      All of the above



Insulin is of ____ nature?

a)       Lipid

b)      Protein

c)       Fat

d)      None

Which of the following cells are larger in number?

a)       Alpha-cells

b)      Beta-cells

c)       Delta-cells

d)      All are in the same proportion

Tumor on beta-cell causes destruction of ___?

a)       Alpha-cells

b)      Beta-cells

c)       Delta-cells

d)      All



Which of the following hormones are proteins in nature?

a)       Estrogen

b)      Testosterone

c)       Cortisone

d)      Insulin and glucagon

If somatotropin is produced in excess during early life, it leads to?

a)       Gigantism

b)      Dwarfism

c)       Thick skin

d)      Hirsutism

Prolactin stimulates the?

a)       Egg production

b)      Rupturing of egg

c)       Milk production

d)      Food production in the uterus



Excess MSH is secreted in the disease:

a)       Addison’s disease

b)      Epilepsy

c)       Dwarfism

d)      None of the above

The thyroid gland is situated above the:

a)       Pharynx

b)      Larynx

c)       Esophagus

d)      Stomach

The thyroid gland produces the secretion:

a)       T3

b)      T4

c)       Calcitonin

d)      All of the above



Which of the following hormone is produced during the metamorphosis of amphibians?

a)       ADH

b)      Thyroxin

c)       Insulin

d)      ACTH

ADH and oxytocin are stored in?

a)       Hypothalamus

b)      Anterior pituitary

c)       Posterior pituitary

d)      All of the above

Which of the following cells produce insulin?

a)       Alpha-cells

b)      Beta-cells

c)       Delta-cells

d)      All of the above



The medulla in the adrenal gland produces the hormone:

a)       Aldosterone

b)      Insulin

c)       Nor-epinephrine

d)      All of the above


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Biology MCQs For Entry Test Preparation (Chapter Wise) || Important Biology MCQs For Entry Test || MDCAT Biology Test Online Preparation MCQs with Answers