All Free Psychology MCQs with Answers

• A. Hormones
• B. Steroids
• C. Proteins
• D. All of the above

Explanation: Hormones are chemical messengers released directly into the bloodstream and carried to specific target tissues.

• A. Endocrine glands
• B. Ductless glands
• C. Epilepsy
• D. both a & b

Explanation: An endocrine gland is a group of cells that produces and releases chemical substances without ducts, so endocrine glands are also called…

• A. Initiating new biochemical reactions
• B. Produce their effect by regulating biochemical reactions
• C. Control long-term changes only
• D. both a & b

Explanation: Hormones influence target cells by binding to receptors and either initiating cellular biochemical responses or regulating reactions…

• A. Can receive all types of stimulus
• B. Can able to detect particular types of stimulus
• C. Can receive all types of stimuli but one at a time
• D. Receptor does not receive stimuli

Explanation: Each receptor is specialised for particular forms of stimulation, such as light, pressure, temperature, or chemicals.

• A. Meissner corpuscle (touch)
• B. Pacini corpuscles (pressure)
• C. Free nerve endings (pain)
• D. All of the above

Explanation: The skin contains several receptor types: Meissner corpuscles detect light touch, Pacinian corpuscles detect pressure or vibration, and…

• A. Photoreceptors
• B. Nociceptors
• C. Chemoreceptors
• D. Thermoreceptors

Explanation: Thermoreceptors are sensory receptors specialised for detecting changes in temperature, including cold and warmth.

• A. Nerve impulse
• B. Saltatory impulse
• C. Presynaptic impulse
• D. Postsynaptic impulse

Explanation: In a myelinated axon, the impulse appears to jump between the nodes of Ranvier rather than travelling continuously along the…

• A. Chemical coordination
• B. Nervous coordination
• C. Both a & b
• D. None of these

Explanation: Both nervous and endocrine coordination help maintain homeostasis: the nervous system acts rapidly, while hormones often provide slower…

• A. Receptors
• B. Neurons
• C. Effectors
• D. All of the above

Explanation: Coordination involves receptors detecting changes, neurons carrying impulses, and effectors producing responses.

• A. Prolactin
• B. Gastrin
• C. Secretin
• D. None of these

Explanation: Gastrin is released by the pyloric mucosa and stimulates gastric glands to secrete gastric juice.

• A. Chemical coordination
• B. Nervous coordination
• C. Feedback mechanism
• D. Both a & b

Explanation: A feedback mechanism occurs when the product or outcome of a process influences the mechanism producing it, usually to regulate or…

• A. Adrenaline
• B. Nor-adrenaline
• C. Oxytocin
• D. Both a & bGet Study Guides

Explanation: Noradrenaline produces marked vasoconstriction, particularly in areas such as the gut, thereby increasing peripheral resistance and blood…

• A. Progesterone
• B. Antidiuretic hormone
• C. Prolactin
• D. VasopressinEnroll In Courses

Explanation: After ovulation, the ruptured follicle becomes the corpus luteum, which secretes progesterone to prepare and maintain the uterine lining.

• A. Adrenal cortex
• B. Adrenal medulla
• C. Both a & b
• D. None of these

Explanation: The adrenal medulla releases adrenaline and noradrenaline as part of the sympathetic fight-or-flight response.

• A. Gonads
• B. Adrenals
• C. Medulla
• D. Cortex

Explanation: The adrenal glands are paired endocrine glands located above the kidneys.

• A. Aldosterone
• B. Androgenic hormone
• C. Adrenaline
• D. Both a & b

Explanation: The adrenal cortex produces steroid hormones, including aldosterone and adrenal androgens.

• A. Hypoglycemia
• B. Hyperglycemia
• C. Diabetes mellitus
• D. Both a & b

Explanation: Excess insulin removes too much glucose from the bloodstream, producing hypoglycemia.

• A. Diabetes insipidus
• B. Diabetes mellitus
• C. Gluconism
• D. Both a & b

Explanation: Insulin deficiency causes diabetes mellitus, in which blood glucose remains abnormally high.

• A. Muscles
• B. Liver
• C. Islets of Langerhans
• D. Both a & b

Explanation: Insulin promotes glycogen formation and therefore inhibits glycogen breakdown in both liver and muscles.

• A. Glucagon
• B. Insulin
• C. Alpha cells of pancreas
• D. None of theseTry Prep Courses

Explanation: Insulin lowers blood glucose by helping cells take up glucose and by promoting its storage as glycogen.