Free General Psychology MCQs with Answers

• A. Thyroxine
• B. Tri-iodothyronine (T3)
• C. Calcitonin
• D. All of the above

Explanation: The thyroid produces thyroxine (T4), triiodothyronine (T3), and calcitonin.

• A. Thyroxine
• B. Tri-iodothyronine (T3)
• C. Calcitonin
• D. Parathormone

Explanation: The parathyroid glands secrete parathormone, also called parathyroid hormone or PTH, which raises and regulates blood calcium levels.

• A. Axons
• B. Dendrites
• C. Neuroglia
• D. Nissl's granules

Explanation: Neuroglia support, nourish, and protect neurons, including forming myelin around many axons.

• A. Central nervous system
• B. Diffused nervous system
• C. Somatic nervous system
• D. Sympathetic nervous system

Explanation: The somatic nervous system controls voluntary movement by sending motor commands to skeletal muscles.

• A. Somatic nervous system
• B. Autonomic nervous system
• C. Central nervous system
• D. Diffused nervous system

Explanation: The autonomic nervous system regulates involuntary activity in internal organs, glands, cardiac muscle, and smooth muscle.

• A. Pacinian corpuscles
• B. Meissner's corpuscles
• C. Nissl's granules
• D. Free nerve endings

Explanation: Pacinian corpuscles are encapsulated receptors sensitive to deep pressure and vibration.

• 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…