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 17 of 44
321. For every two K+ ions transported inward a neutron cell., how many Na+ ions are transported outside:
- A. One
- B. Two
- C. Three
- D. Twenty
Explanation: The sodium-potassium pump moves three Na+ ions out of the neuron for every two K+ ions it moves inward.
Correct answer: Three- A. Autonomic nervous system
- B. Centralized nervous system
- C. Peripheral nervous system
- D. Diffused nervous system
Explanation: In basic evolutionary classifications, a diffuse nervous system is regarded as the earliest and simplest type, as seen in animals such as…
Correct answer: Diffused nervous system- A. Somatic nervous system
- B. Brain
- C. Autonomic nervous system
- D. Spinal cord
Explanation: The brain receives and interprets sensory information, produces responses, stores memories, and supports thought and emotion.
Correct answer: Brain- A. Membrane potential
- B. Electrical potential
- C. Resting potential
- D. Action potential
Explanation: Membrane potential is the electrical voltage difference across a cell membrane.
Correct answer: Membrane potential- A. Membrane potential
- B. Electrical potential
- C. Resting membrane potential
- D. Action potential
Explanation: When a neuron is not conducting an impulse, the charge difference between its inner and outer surfaces is called the resting membrane…
Correct answer: Resting membrane potential- A. Receptors
- B. Neurons
- C. Effectors
- D. All of these
Explanation: Neurons are specialized nerve cells that connect with one another to form communication networks, either directly or through the central…
Correct answer: Neurons- A. Diffused nervous system
- B. Centralized nervous system
- C. Peripheral nervous system
- D. Autonomic nervous system
Explanation: Hydra, jellyfish, and related animals have a diffuse nervous system, also called a nerve net, in which neurons are spread throughout the…
Correct answer: Diffused nervous system328. One of the following leads to gigantism if produced in excess during early life of a human being:
- A. Gonadotrophic hormone
- B. Thyroid stimulating hormone
- C. Somatotropin(STH)
- D. Adrenocorticotrophic hormone
Explanation: Somatotropin, or growth hormone, stimulates bone and body growth; excessive secretion before the growth plates close causes gigantism.
Correct answer: Somatotropin(STH)- A. Central nervous system
- B. Peripheral nervous system
- C. Autonomic nervous system
- D. Somatic nervous system
Explanation: The central nervous system, consisting of the brain and spinal cord, interprets incoming information and organizes responses.
Correct answer: Central nervous system- A. Somatotropin(STH)
- B. Thyroid stimulating hormone
- C. Gonadotrophic hormone
- D. All of the above
Explanation: The anterior pituitary secretes growth hormone or somatotropin, thyroid-stimulating hormone, and the gonadotrophins.
Correct answer: All of the above- A. Oxytocin
- B. Antidiuretic hormone
- C. Calcitonin
- D. Adrenocorticotrophic hormone
Explanation: Adrenocorticotrophic hormone is released by the anterior pituitary and stimulates the adrenal cortex.
Correct answer: Adrenocorticotrophic hormone- A. Sodium
- B. Potassium
- C. Organic ions
- D. Inorganic ions
Explanation: Depolarization at the start of a nerve impulse occurs when sodium channels open and membrane permeability to sodium rises.
Correct answer: Sodium- A. Threshold potential
- B. Active membrane potential
- C. Resting membrane potential
- D. All of the above
Explanation: A nerve impulse is the action potential produced when the membrane enters its active state, involving rapid depolarization and…
Correct answer: Active membrane potential- A. Hydra
- B. Jelly fish
- C. Planaria
- D. Cartilaginous fish
Explanation: Planaria show the early centralization of the nervous system through anterior ganglia and longitudinal nerve cords.
Correct answer: Planaria- A. Planaria
- B. Jelly fish
- C. Sea anemone
- D. Coral
Explanation: Planaria possess a superficial neuronal network along with a deeper plexus embedded in the parenchyma.
Correct answer: Planaria- A. Anterior pituitary lobe
- B. Posterior pituitary lobe
- C. Median pituitary lobe
- D. None of these
Explanation: The anterior pituitary is traditionally called the master gland because its hormones regulate several other endocrine glands.
Correct answer: Anterior pituitary lobe- A. Hydra
- B. Planaria
- C. Frog
- D. Man
Explanation: Hydra has a diffuse nerve net in which neurons spread throughout the body without forming a central brain.
Correct answer: Hydra- A. Planaria
- B. Mosquito
- C. Toad
- D. Hydra
Explanation: Hydra's nerve net lies between the outer ectoderm and inner endoderm, allowing stimuli to spread through its body.
Correct answer: Hydra- A. Mouth
- B. Tentacles
- C. Enteron
- D. Whole body
Explanation: Hydra's tentacles contain sensory and nerve cells and are directly involved in detecting and responding to stimuli, especially contact…
Correct answer: Tentacles- A. Anterior pituitary lobe
- B. Posterior pituitary lobe
- C. Median pituitary lobe
- D. Hypophysis cerebri
Explanation: Oxytocin and ADH are synthesized in the hypothalamus but transported down axons and stored in the posterior pituitary until release.
Correct answer: Posterior pituitary lobe