Free Coordination and Control MCQs with Answers
1,687 Coordination and Control MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Coordination depends on receptors, neurons, synapses and nerve impulses, with reflex actions traced through the reflex arc and the roles of major brain regions. Chemical coordination covers endocrine glands and hormones, including how hormones regulate growth, metabolism, reproduction and internal balance, unlike rapid nervous control.
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- A. Potassium leakage
- B. Resting membrane potential
- C. Action potential
- D. Repolarization
- E. Sub-threshold potential
Explanation: An action potential is a rapid and temporary change in the membrane potential of a neuron or muscle cell that allows for the transmission…
Correct answer: Action potential- A. Meninges
- B. Spinal cord
- C. Axon
- D. Brainstem
- E. Hindbrain
Explanation: The spinal cord is a long, cylindrical bundle of nerve fibers and supporting cells that extends from the brainstem (specifically the…
Correct answer: Spinal cord- A. Pituitary gland
- B. Cerebellum
- C. Thalamus
- D. Amygdala
- E. Hippocampus
Explanation: The correct answer is Amygdala because it plays a key role in processing emotions and controlling behavioral responses that are related to…
Correct answer: Amygdala- A. Acetylcholine
- B. Endorphins
- C. Gamma-aminobutyric acid
- D. Dopamine
Explanation: Acetylcholine is a neurotransmitter involved in both the central and peripheral nervous systems.
Correct answer: Acetylcholine- A. Inward movement of Na+
- B. Inward movement of K+
- C. Outward movement of K+
- D. Outward movement of Na+
Explanation: The inward movement of Na+ (sodium ions) occurs during the depolarization phase of a nerve impulse.
Correct answer: Inward movement of Na+- A. Regulate response of visceral organs
- B. Regulate response of skeletal muscles
- C. Regulate response of glands
- D. Regulate response of smooth muscles
Explanation: The autonomic nervous system (ANS) does not directly regulate the response of skeletal muscles.
Correct answer: Regulate response of skeletal muscles- A. Mechanoreceptors
- B. Nociceptors
- C. Photoreceptors
- D. Chemoreceptors
Explanation: Chemoreceptors are specialized sensory receptors that detect changes in the chemical composition of the environment.
Correct answer: Chemoreceptors- A. Estrogen
- B. Progesterone
- C. Oxytocin
- D. Corticosteroid
Explanation: During labor, oxytocin stimulates contractions of the uterine muscles, facilitating childbirth.
Correct answer: Oxytocin- A. Vitamins
- B. Minerals
- C. Lipids
- D. Cortisone
Explanation: Lipids are organic compounds that include fats, oils, and waxes. They are key for energy storage, forming cell membranes, and insulating…
Correct answer: Lipids- A. Forebrain
- B. Mid brain
- C. Hind brain
- D. Hippocampus
Explanation: The hindbrain is the posterior part of the brain that plays a vital role in controlling essential bodily functions and motor activities.
Correct answer: Hind brain- A. Antidiuretic Hormone (ADH)
- B. Thyroid Stimulating Hormone (TSH)
- C. Adreno Corticufrotric Hormone (ACH)
- D. Follicle Stimulating Hormone (FSH)
Explanation: ADH is synthesized in the posterior side of the pituitary gland. It regulates water retention by the kidneys, promoting water reabsorption…
Correct answer: Antidiuretic Hormone (ADH)- A. 100-120
- B. 130-150
- C. 160-180
- D. 190-210
Explanation: Option A is correct, as nerve impulses in human myelinated fibers typically travel within a 100-120 range due to saltatory conduction.
Correct answer: 100-120- A. Mesosomes
- B. Lysosomes
- C. Ribosomes
- D. Chromosome
Explanation: Nissl granules are primarily made up of rough endoplasmic reticulum (rER) and ribosomes.
Correct answer: Ribosomes- A. Ten-times
- B. Fifteen-times
- C. Twenty times
- D. Twenty-five times
Explanation: During resting membrane potential, the concentration of potassium ions (K⁺) is typically about 20 times higher inside the cell compared to…
Correct answer: Twenty times- A. Axoplasm
- B. Nissl's granules
- C. Node of Ranvier
- D. Polysomes
Explanation: Nissl's granules consist mainly of ribosomes and rough endoplasmic reticulum.
Correct answer: Nissl's granules- A. Concentrations of certain ion
- B. Concentrations of hydrogen ion
- C. Permeability of calcium ion
- D. Permeability to certain ion
Explanation: The permeability of a cell membrane to specific ions is crucial for establishing the resting membrane potential and generating action…
Correct answer: Permeability to certain ion- A. Adrenal gland
- B. Parathyroid gland
- C. Pituitary gland
- D. Thymus gland
Explanation: The adrenal glands produce a variety of hormones, including cortisol (which regulates metabolism and the stress response), aldosterone…
Correct answer: Adrenal gland- A. Antidiuretic hormone
- B. Epinephrine
- C. Nor-epinephrine
- D. Thyroid-stimulating hormone
Explanation: Norepinephrine primarily increases blood pressure by constricting blood vessels, enhances alertness, and supports the body's response to…
Correct answer: Nor-epinephrine- A. Cardiac muscle contraction
- B. Salivation
- C. Smooth muscle contraction
- D. Thoughts and emotions
Explanation: Thoughts and emotions are governed by the central nervous system (CNS), particularly the brain regions such as the prefrontal cortex for…
Correct answer: Thoughts and emotions1020. A motor neuron:
- A. Carries impulse from effectors to CNS
- B. Carries impulse from receptors to CNS
- C. Carries impulse from CNS to muscles
- D. Connects sensory nerves to ganglions
Explanation: Efferent neurons (or motor neurons) carry impulses from the central nervous system (CNS) to muscles and glands.
Correct answer: Carries impulse from CNS to muscles