All Free Psychology MCQs with Answers

• A. serotonin
• B. endorphins
• C. dopamine
• D. insulin

Explanation: Insulin is primarily a hormone that regulates blood glucose, not a neurotransmitter used for rapid neuron-to-neuron signalling.

• A. pituitary gland
• B. parathyroid gland
• C. adrenal medulla
• D. parasympathetic nervous system

Explanation: The adrenal medulla releases adrenaline and noradrenaline during acute stress, preparing the body for fight or flight.

• A. at its resting potential
• B. in its absolute refractory period
• C. an afferent neuron
• D. in its relative refractory period

Explanation: The absolute refractory period is the brief interval after an action potential when voltage-gated sodium channels cannot be reactivated…

• A. a cell body
• B. septum
• C. myelin sheath
• D. dendrites

Explanation: A septum is a partitioning structure, not a standard part of a neuron. Neurons commonly have a cell body and dendrites, while myelin…

• A. synaptic reflex
• B. spastic movement
• C. monosynaptic reflex
• D. double innervations

Explanation: The knee-jerk response uses a single synapse between a sensory neuron and a motor neuron, making it a monosynaptic reflex.

• A. amygdala
• B. cerebellum
• C. thalamus
• D. medulla

Explanation: The amygdala helps regulate fear, aggression, and other emotional responses, so it is the structure most associated with pathological…

• A. thyroid
• B. adrenal
• C. pituitary
• D. pineal

Explanation: The pituitary is called the master gland because its hormones influence several other endocrine glands, including the thyroid, adrenals…

• A. Broca's area
• B. Nodes of Ranvier
• C. terminal buttons
• D. Wernicke's area

Explanation: Nodes of Ranvier are exposed gaps between sections of myelin, allowing the action potential to jump from node to node in saltatory…

• A. medulla
• B. midbrain
• C. cerebellum
• D. pons

Explanation: The medulla contains vital respiratory and cardiovascular control centers, so severe damage there can stop breathing.

• A. constriction of the pupils
• B. increased rate of digestion
• C. accelerated heart beat
• D. increased hormone production

Explanation: Adrenaline activates the sympathetic fight-or-flight response, which raises heart rate and redirects energy toward immediate action.

• A. ovaries
• B. testes
• C. pituitary gland
• D. hypothalamus

Explanation: Follicle-stimulating hormone is produced and released by the anterior pituitary, where it supports ovarian follicle development in females…

• A. afferent nerve, efferent nerve, neural modulator
• B. efferent nerve, interneuron, afferent nerve
• C. afferent nerve, interneuron, efferent nerve
• D. efferent nerve, afferent nerve, neural modulator

Explanation: Sensory information travels toward the central nervous system through an afferent neuron, is processed by an interneuron, and reaches…

• A. limbic activating system
• B. cerebral activating system
• C. reticular activating system
• D. thalamic activating system

Explanation: The reticular activating system in the brainstem regulates arousal and helps shift the brain from sleep to wakefulness.

• A. Johannes Muller
• B. Franz Gall
• C. William James
• D. Charles Sherrington

Explanation: Charles Sherrington is credited with inferring and naming the synapse, the junction through which neurons communicate.

• A. effectors
• B. receptors
• C. afferent nerves
• D. efferent verves

Explanation: Glands are effectors because they respond to neural or hormonal signals by secreting substances.

• A. receptors
• B. effectors
• C. innervates
• D. affectors

Explanation: Effectors are structures that produce a response, including both muscles, which contract, and glands, which secrete substances.

• A. transposition
• B. transduction
• C. transition
• D. transference

Explanation: Transduction is the conversion of physical energy, such as light, sound, or pressure, into neural signals that the nervous system can…

• A. visual and auditory
• B. auditory and temperature
• C. gustation and olfaction
• D. temperature and pressure

Explanation: Gustation and olfaction are the chemical senses because taste and smell depend on detecting molecules dissolved in saliva or carried in…

• A. testosterone and androgen
• B. progesterone and estrogen
• C. testosterone and estrogen
• D. progesterone and testosterone

Explanation: Estrogen and progesterone are the principal female sex hormones, supporting reproductive development, menstrual regulation, and pregnancy.

• A. hypothalamus
• B. thalamus
• C. Broca's area
• D. fissure of Ronaldo

Explanation: Broca’s area coordinates the motor patterns needed for speech production, including movements of the vocal apparatus.