All Free Psychology MCQs with Answers

• A. Finger tips
• B. Skin of the neck
• C. Skin of the abdomen
• D. Evenly distributed throughout the body

Explanation: Touch receptors are concentrated where fine tactile discrimination is most useful, especially the fingertips.

• A. Nor-epinephrine
• B. Serotonin
• C. Dopamine
• D. All of these

Explanation: Norepinephrine, serotonin, and dopamine are all neurotransmitters involved in communication within the brain and spinal cord.

• A. Touch and pressure
• B. Pain
• C. Heat and Cold
• D. All of the above

Explanation: Skin contains receptors for several sensations, including touch and pressure, pain, and temperature such as heat and cold.

• A. Brain
• B. Spinal cord
• C. Joints
• D. Skin

Explanation: Vibrations from the ground can stimulate mechanoreceptors associated with joints, which detect mechanical movement and vibration.

• A. Neurotransmitters
• B. Neuro relaxers
• C. Neuro messengers
• D. Synaptic transmitters

Explanation: Neurons are separated by a small synaptic gap, so the electrical impulse is converted into a chemical signal released as a…

• A. Acetylcholine
• B. Adrenaline
• C. Dopamine
• D. All of the above

Explanation: Acetylcholine and dopamine are established neurotransmitters, and adrenaline can also function as a neurotransmitter, particularly in the…

• A. Alpha cells
• B. Beta cells
• C. Islets of Langerhans
• D. All of the above

Explanation: Alpha cells in the islets of Langerhans secrete glucagon, while beta cells secrete insulin.

• A. Synaptic vesicles
• B. Synaptic knobs
• C. Synapses
• D. All of the above

Explanation: A synapse is the junction or microscopic gap between two neurons through which signals are communicated.

• A. Estrogen
• B. Progesterone
• C. Oxytocin
• D. prolactin

Explanation: Estrogen produces female secondary sexual characteristics and stimulates proliferative growth of the uterine lining.

• A. Addison's disease
• B. Cushing's disease
• C. Graves disease
• D. All of the above

Explanation: Cushing disease or syndrome involves prolonged excess cortisol, commonly from an ACTH-producing pituitary tumor or another source of…

• A. Addison's disease
• B. Cushing disease
• C. Graves disease
• D. All of the above

Explanation: Excess cortisol in Cushing disease increases protein breakdown, causing muscle wasting and weakening of connective tissue and bone.

• A. Goiter
• B. Pancreas
• C. Parathyroids
• D. Adrenals

Explanation: The parathyroid glands are small glands embedded on the posterior surface of the thyroid lobes and regulate blood calcium.

• A. High levels of Ca++ions
• B. Low levels of Ca++ions
• C. Lack of iodine
• D. Deficiency of thyroxine

Explanation: A fall in blood calcium stimulates the parathyroid glands to release parathyroid hormone, which raises calcium levels through effects on…

• A. Gigantism
• B. Dwarfism
• C. Graves disease
• D. Cretinism

Explanation: Cretinism, an older term for severe congenital hypothyroidism, can cause impaired physical development, coarse or dry skin, sparse hair…

• A. Goiter
• B. Increase in body weight
• C. Cretinism
• D. Both a & b

Explanation: Iodine is needed to make thyroxine; when it is deficient, the thyroid enlarges as goiter and low thyroxine slows metabolism, commonly…

• A. Graves disease
• B. Myxedema
• C. Exophthalmic goiter
• D. Cretinism

Explanation: Myxedema is adult-onset hypothyroidism, in which low thyroxine produces puffiness and slows physical and mental processes.

• A. Prolactin
• B. Antidiuretic hormone
• C. Oxytocin
• D. Luteinizing hormone

Explanation: Oxytocin release rises when the cervix is stretched during labour and during suckling; it promotes uterine contractions and milk ejection.

• A. Gigantism
• B. Dwarfism
• C. Graves disease
• D. Cretinism

Explanation: Congenital thyroxine deficiency disrupts brain and physical development and is classically called cretinism.

• A. follicle stimulating hormone
• B. Luteinizing hormone
• C. Prolactin
• D. Vasopressin

Explanation: Prolactin from the anterior pituitary stimulates the mammary glands to produce milk.

• A. Anterior pituitary lobe
• B. Median pituitary lobe
• C. Posterior lobe
• D. Both a & b

Explanation: Melanocyte-stimulating hormone is associated with the intermediate or median lobe of the pituitary and increases melanin production.