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.
Last updated
1,687 questions · page 47 of 85
- A. Tetany
- B. Anemia
- C. Angina pectoris
- D. Gout
Explanation: Tetany is a spasm and twitching of the muscles, particularly those of the face, hands, and feet.
Correct answer: Tetany- A. Both calcitonin and parathormone
- B. Calcitonin
- C. Parathormone
- D. Thyroxine
Explanation: Parathormone is secreted by chief cells of the parathyroid that regulate the metabolism of calcium and phosphate.
Correct answer: Parathormone- A. Reduce both heart rate and cardiac output
- B. Heart rate is increased without affecting the cardiac output
- C. Both heart rate and cardiac output increase
- D. Heart rate decreases but cardiac output increases
Explanation: Parasympathetic neural signals, mediated by the vagus nerve (cranial nerve X), exert an inhibitory influence on the heart.
Correct answer: Reduce both heart rate and cardiac output- A. Cornea
- B. Retina
- C. Sclerotic
- D. Iris
Explanation: The retina consists of both the pigmented layer and the sensory layer. The pigment cells reinforce the light-absorbing property of the…
Correct answer: Retina- A. Short term memory
- B. Coordination during locomotion
- C. Executive functions; such as decision making
- D. Regulation of body temperature.
Explanation: The hypothalamus lies at the base of the thalamus. It provides an anatomical connection between the nervous and endocrine systems through…
Correct answer: Regulation of body temperature.- A. Pons
- B. Medulla
- C. Mesencephalon
- D. None of these
Explanation: The midbrain is also known as the mesencephalon. It is a small part of the brain that is involved in vision, hearing, and motor control.
Correct answer: Mesencephalon- A. Sodium ions diffuse in
- B. Potassium diffuses out
- C. Potassium diffuses in
- D. Sodium diffuses out
Explanation: Repolarization is restored when potassium ions diffuse out of the neuron, as they are more concentrated inside than outside.
Correct answer: Potassium diffuses out- A. Axon
- B. Dendrites
- C. Synapse
- D. Thalamus
- E. Cerebellum
Explanation: Synapse, also called a neuronal junction, is the site of transmission of electric nerve impulses between two nerve cells (neurons) or…
Correct answer: Synapse- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: To relay nerve impulses from within the CNS, interneurons are used. To conduct the nerve impulses from the CNS to the effector, motor…
Correct answer: Option A- A. Ions
- B. Hormones
- C. Enzymes
- D. Proteins
Explanation: The neurotransmitter molecules bind to the receptors on the postsynaptic membrane, triggering an action potential in the postsynaptic…
Correct answer: Ions- A. Few minutes
- B. Few milliseconds
- C. Few hours
- D. Few seconds
Explanation: Action potential is a temporary localized reversal of the polarity of the neurolemma, which occurs when the neurolemma is stimulated…
Correct answer: Few milliseconds- A. Hippocampus
- B. Cerebellum
- C. Cerebrum
- D. Pons
Explanation: The hippocampus is a complex brain structure, curved like a seahorse, located deep in the temporal lobe, that is critical for learning and…
Correct answer: Hippocampus- A. Synapse
- B. Mono synaptic reflex
- C. Reflex arc
- D. Synaptic cleft
Explanation: Option A: Synapse: The region where the impulse moves from one neuron to another is called a synapse.
Correct answer: Mono synaptic reflex- A. Sodium
- B. Potassium
- C. Calcium
- D. Proteins
Explanation: Calcium ions cause the vesicles containing neurotransmitters to fuse with the axon terminals and release the neurotransmitter into the…
Correct answer: Calcium- A. Transmission blocker
- B. Neurotransmitter
- C. Anesthesia
- D. Sedative
Explanation: Dopamine, along with acetylcholine, norepinephrine (noradrenaline), glycine, GABA, serotonin, etc., acts as a neurotransmitter.
Correct answer: Neurotransmitter- A. Medulla oblongata
- B. Cerebellum
- C. Cerebrum
- D. Hypothalamus
Explanation: The cerebrum is the largest part of the brain, divided into two hemispheres that control high-level functions like conscious thought…
Correct answer: Cerebrum937. The junction between the axon ending of a neuron and the dendrites of another neuron is called:
- A. Synapse
- B. Nissl's body
- C. Neuroglia
- D. Myelin sheath
Explanation: The junction between the axon terminal of one neuron and the dendrites of another neuron is known as a synapse.
Correct answer: Synapse- A. Enzyme
- B. Inhibitory neurotransmitter
- C. Excitatory neurotransmitter
- D. Hormone
Explanation: GABA (Gamma-Aminobutyric Acid) is an inhibitory neurotransmitter. It functions to inhibit or reduce the activity of neurons, helping to…
Correct answer: Inhibitory neurotransmitter- A. Stay in the synaptic cleft indefinitely
- B. Recycled in the synaptic cleft
- C. Degraded by enzyme
- D. Taken up by the postsynaptic membrane
Explanation: After transmitting the nerve impulse, the neurotransmitters are degraded by enzymes.
Correct answer: Degraded by enzyme- A. K+
- B. Na+
- C. Ca+
- D. Cl-
Explanation: During the non-conducting state (resting state) of a neuron, the neuronal membrane is primarily permeable to the efflux of potassium ions…
Correct answer: K+