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. Volta
- B. Jenner
- C. Salk
- D. Galvani
Explanation: Galvani experimented with the dissected leg of a frog and discovered the remarkable effects of static electricity, which caused their legs…
Correct answer: Galvani- A. Extra cellular sodium is high
- B. Extra cellular potassium is high
- C. Intracellular sodium is high
- D. Intracellular potassium is less
Explanation: Option A: This is true at rest, but not during an action potential. During an action potential, the concentration of sodium ions outside…
Correct answer: Intracellular sodium is high- A. Cell bodies of sensory neurons
- B. Cell bodies of interneurons
- C. Axons of interneurons
- D. Cell bodies of motor neurons
Explanation: Gray matter, the inner matter of the spinal cord does not contain cell bodies of sensory neurons.
Correct answer: Cell bodies of sensory neurons- A. -70 mV
- B. -60 mV
- C. -50 mV
- D. -40 mV
Explanation: The resting membrane potential of a neuron is the electrical potential inside the cell relative to the adjacent extracellular space.
Correct answer: -70 mV- A. Epinephrine
- B. Acetylcholine
- C. Dopamine
- D. Serotonin
Explanation: Acetylcholine is a type of chemical messenger, or neurotransmitter, that plays a vital role in the central and peripheral nervous system.
Correct answer: Acetylcholine- A. -70 mv
- B. -70 Volt
- C. 70mv
- D. -90 mv
Explanation: In most neurons the resting potential has a value of approximately −70 mV.
Correct answer: -70 mv- A. Synaptic knob
- B. Synaptic cleft
- C. Synaplic delay
- D. Synaptic vesicle
Explanation: A synapse is the small gap between two neurons, where nerve impulses are relayed by a neurotransmitter from the axon of a presynaptic…
Correct answer: Synaptic cleft- A. Axon
- B. Auxin
- C. Sehwann cell
- D. Dendrites
Explanation: An extension or process called an axon carries impulses away from the cell body.
Correct answer: Axon- A. Hormones
- B. Activators
- C. Neurotransmitters
- D. Enzymes
Explanation: Neurotransmitters are chemical compounds released by neurons after depolarization that act on other neurons to produce a response.
Correct answer: Neurotransmitters- A. 10
- B. 30
- C. 2
- D. 3
Explanation: The concentration of Na+ ions is approximately 10 times greater in fluids outside (extracellular) the cell compared to inside…
Correct answer: 10- A. Postsynaptic neuron
- B. Presynaptic neuron
- C. Synapses
- D. Dendrites
Explanation: Neurotransmitters are synthesized and stored within the presynaptic neuron, specifically in structures called synaptic vesicles.
Correct answer: Presynaptic neuron- A. Impulse
- B. Synapse
- C. Axon
- D. Cleft
Explanation: A synapse is a specialized junction between two neurons (nerve cells) where they communicate.
Correct answer: Synapse- A. Serotonin
- B. Aspartame
- C. Ascorbic acid
- D. Hydrazine
Explanation: Serotonin is a compound that conducts nerve impulses in the brain. It contains 68.2%C,6.86%H,15.9%N, and 9.08%O .
Correct answer: Serotonin- A. Thermoreceptor
- B. Photoreceptor
- C. Chemoreceptor
- D. Nocireceptor
Explanation: The pain receptors are nociceptors. They are known to exist in muscle, joints, and skin.
Correct answer: Nocireceptor1595. Touch receptors are:
- A. Paccinian's corpuscles
- B. Olfactory receptors
- C. Miessner's corpuscles
- D. Nociceptors
Explanation: Meissner corpuscles consist of a cutaneous nerve ending responsible for transmitting the sensations of fine, discriminative touch and…
Correct answer: Miessner's corpuscles- A. Vision
- B. Metabolism
- C. Muscle contraction
- D. Muscle twitch
Explanation: The retina is a thin layer of tissue that lines the back of the eye on the inside. It is located near the optic nerve.
Correct answer: Vision- A. Monosynaptic reflex arc
- B. Disynaptic reflex arc
- C. Polysynaptic reflex arc
- D. Asynaptic reflex arc
Explanation: Monosynaptic reflex arc has only two neurons, i.e. sensory and motor which form one synapse.
Correct answer: Monosynaptic reflex arc- A. Reflex arc
- B. Sensory pathway
- C. Motor pathway
- D. Somatosensory pathway
Explanation: A reflex, is an involuntary and nearly instantaneous movement in response to a stimulus.A reflex arc is a neural pathway that controls a…
Correct answer: Reflex arc- A. Midbrain.
- B. Medulla.
- C. Pons.
- D. Cerebellum.
Explanation: Medulla controls several automatic functions, such as breathing, heart rate, blood pressure and swallowing.
Correct answer: Medulla.- A. Alzheimer's disease.
- B. Epilepsy.
- C. Parkinson's disease.
- D. None of these.
Explanation: Alzheimer's disease is a brain disorder that slowly destroys memory and thinking skills and eventually the ability to carry out the…
Correct answer: Alzheimer's disease.