Free General Psychology MCQs with Answers
874 General Psychology MCQs from Psychology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
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874 questions · page 16 of 44
- A. diffused nervous system
- B. Peripheral nervous system
- C. Sensory nervous system
- D. Motor nervous system
Explanation: The peripheral nervous system includes all neural structures outside the brain and spinal cord, carrying signals between the central…
Correct answer: Peripheral nervous system- A. Threshold stimulus
- B. Active membrane potential
- C. Resting membrane potential
- D. All of the above
Explanation: A threshold stimulus is the minimum effective stimulation needed to initiate a nerve impulse.
Correct answer: Threshold stimulus- A. Resting membrane potential
- B. Threshold stimulus
- C. Active membrane potential
- D. None of these
Explanation: During the active or action potential, ion movement reverses the usual charge arrangement so the inside briefly becomes more positive than…
Correct answer: Active membrane potential- A. Action potential
- B. Resting potential
- C. Threshold potential
- D. None of these
Explanation: The brief reversal of charge across a stimulated neuron's membrane is an action potential.
Correct answer: Action potential- A. Membrane potential
- B. Resting membrane potential
- C. Nerve impulse
- D. Electron pump
Explanation: A nerve impulse is the travelling wave of electrical and chemical changes produced by ion movement across the neuron's membrane.
Correct answer: Nerve impulse- A. 0.05
- B. 0.07
- C. 0.05 to 0.07
- D. 1
Explanation: A neuron at rest typically has a membrane potential of about −0.07 volts, or −70 millivolts, with the inside negative relative to the…
Correct answer: 0.07- A. Membrane potential
- B. Electrical potential
- C. Resting potential
- D. Action potential
Explanation: Electrical potential refers to the capacity of an electrical charge to do work.
Correct answer: Electrical potential- A. Sensory
- B. Associative
- C. Motor
- D. All of these
Explanation: Mammalian nervous systems contain sensory neurons that receive input, motor neurons that produce responses, and associative neurons that…
Correct answer: All of these- A. Reflex action
- B. Reflex arc
- C. Membrane potential
- D. Reflex circuit
Explanation: A reflex arc is the neural pathway carrying information from a receptor through the central nervous system to an effector during a reflex.
Correct answer: Reflex arc- A. Reflex arc
- B. Reflex circuit
- C. Nerve impulse
- D. None of these
Explanation: The reflex arc is the route followed by nerve impulses in a reflex, including the sensory neuron, relay centre and motor neuron.
Correct answer: Reflex arc- A. Amoeba
- B. Hydra
- C. Jelly fish
- D. Planaria
Explanation: Planaria have eyespots for detecting light and chemoreceptors for detecting chemicals.
Correct answer: Planaria- A. Cell body or soma
- B. Dendrites
- C. Axon
- D. Cytoplasmic fibers
Explanation: The cell body, or soma, contains the nucleus and most organelles, so it performs the neuron's main metabolic and nutritional functions.
Correct answer: Cell body or soma- A. Pacinian corpuscles
- B. Nissl's granules
- C. Axons
- D. Free nerve endings
Explanation: An axon is the neuron's long cytoplasmic process that carries impulses away from the cell body, usually toward another neuron, muscle or…
Correct answer: Axons- A. Polyribosomes
- B. Nissl's granules
- C. Meissner corpuscles
- D. Pacinian corpuscles
Explanation: Nissl's granules are groups of ribosomes and rough endoplasmic reticulum in the neuron's cell body, where proteins are produced.
Correct answer: Nissl's granules- A. Receptors
- B. Effectors
- C. Schwann cells
- D. both a & b
Explanation: Effectors are structures that produce a response when stimulated by motor neurons, chiefly muscles and glands.
Correct answer: Effectors- A. Glands
- B. Muscles
- C. Neurons
- D. both a & b
Explanation: The two principal types of effectors are muscles, which contract, and glands, which secrete substances.
Correct answer: both a & b- A. Axon
- B. Dendrite
- C. Nissl's granule
- D. Myelin sheath
Explanation: Dendrites are branched processes that generally receive impulses and conduct them toward the cell body.
Correct answer: Dendrite- A. Sodium
- B. Potassium
- C. Organic ions
- D. None of these
Explanation: Potassium ions are much more concentrated inside a resting neuron, roughly twenty to thirty times higher than outside.
Correct answer: Potassium- A. Sodium and potassium ions
- B. Negative organic ion
- C. Leakage of K+ions from neurons
- D. All of the above
Explanation: Resting membrane potential depends on the unequal distribution of sodium and potassium, negatively charged organic ions inside the neuron…
Correct answer: All of the above- A. Sodium
- B. Potassium
- C. Organic ions
- D. All of these
Explanation: Sodium ions are present at a much higher concentration outside the neuron, while potassium is concentrated mainly inside.
Correct answer: Sodium