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. Asymmetrical
- B. Bilaterally symmetrical
- C. Radially symmetrical
- D. All (A), (B) and (C)
Explanation: In radially symmetric animals such as the jellyfish and hydra, the nervous system consists of a diffuse network of isolated cells.
Correct answer: Radially symmetrical- A. Asymmetrical
- B. Bilaterally symmetrical
- C. Radially symmetrical
- D. All (A), (B) and (C)
Explanation: Organisms with bilateral body symmetry are normally associated with a condensation of neurons or, in more advanced forms, a central…
Correct answer: Bilaterally symmetrical- A. 1 trillion
- B. 100 trillion
- C. 1 million
- D. 100 billion
Explanation: Humans have an estimated 100 billion interneurons making up about 99% of all neurons in the body.
Correct answer: 100 billion- A. The spinal cord, axon, vertebra
- B. The cerebrum, cerebellum, pons
- C. The medulla, pons, mid brain
- D. The thalamus, mid brain, pons
Explanation: The brainstem is the structure that connects the cerebrum of the brain to the spinal cord and cerebellum.
Correct answer: The medulla, pons, mid brain- A. Many chromosomes
- B. Non-myelinated axons
- C. May dendrites
- D. Myelinated axon
Explanation: Myelinated axons have insulation from myelin sheaths, which increases the speed of nerve impulses.
Correct answer: Myelinated axon- A. Limbic brain
- B. Brain stem
- C. Cerebral cortex
- D. Occipital
Explanation: The cerebral cortex is intricately involved in conscious activity due to its role in higher-order cognitive functions such as perception…
Correct answer: Cerebral cortex- A. Lateral sulcus
- B. Broca's area
- C. Corpus callosum
- D. Ventral sulcus
Explanation: The corpus callosum is a thick band of nerve fibers connecting the left and right cerebral hemispheres of the brain.
Correct answer: Corpus callosum- A. Thalamus and hypothalamus
- B. Pons and medulla
- C. Hypothalamus and limbic system
- D. Thalamus and limbic system
Explanation: The diencephalon comprises the thalamus, which relays sensory information to the cerebral cortex, and limbic system is involved in…
Correct answer: Thalamus and limbic system469. When your finger accidentally gets caught in a door, the pain message is sent to your brain through:
- A. Medulla oblongata
- B. Motor nerve
- C. Sensory receptors
- D. Caffeine
Explanation: When your finger is accidentally caught in a door, sensory receptors in your skin detect pressure and pain signals.
Correct answer: Sensory receptors- A. The cerebellum
- B. The cerebrum
- C. The medulla
- D. The pons
Explanation: The cerebrum is the largest part of the brain, comprising about 80% of its total volume.
Correct answer: The cerebrum- A. The somatic system
- B. The muscular system
- C. The autonomic system
- D. The skeletal system
Explanation: The autonomic nervous system controls the heartbeat because it regulates involuntary bodily functions, including cardiac activity, through…
Correct answer: The autonomic system- A. White matter
- B. Gary matter
- C. Yellow matter
- D. None of these
Explanation: White matter contains myelinated axons because myelin sheaths, formed by glial cells, facilitate faster transmission of nerve impulses by…
Correct answer: White matter- A. Gray matter
- B. White matter
- C. Brown matter
- D. Yellow matter
Explanation: Gray matter consists of neuronal cell bodies, dendrites, and unmyelinated axons, appearing gray due to the absence of myelin.
Correct answer: Gray matter- A. Cervical enlargement
- B. Lumbar enlargement
- C. Gray matter
- D. White matter
Explanation: Interneurons are present in gray matter because they facilitate communication between sensory and motor neurons, integrating and…
Correct answer: Gray matter- A. Cerebrum and basal ganglia
- B. Diencephalon
- C. Midbrain
- D. Cerebellum, pons and medulla oblongata
Explanation: The embryonic hindbrain gives rise to the medulla and pons due to the differentiation and development of neural structures during early…
Correct answer: Cerebellum, pons and medulla oblongata- A. Thalamus
- B. Hypothalamus
- C. Pons
- D. Medulla oblongata
Explanation: The hypothalamus serves as a vital link between the endocrine and nervous systems by regulating hormone release via the pituitary gland.
Correct answer: Hypothalamus- A. Cardiac center
- B. Respiratory center
- C. Vasomotor center
- D. Reticular formation
Explanation: The reticular formation nuclei extend beyond the medulla oblongata into other regions of the brainstem, including the pons and midbrain…
Correct answer: Reticular formation- A. Skeletal muscles
- B. Glands
- C. Smooth muscles
- D. Cardiac muscles
Explanation: Explanation for this question will be added soon!
Correct answer: Skeletal muscles- A. Sensory neuron
- B. Motor neuron
- C. Effector
- D. Receptor
Explanation: The effector is the last component in a reflex arc because it is the structure or organ that carries out the response to the stimulus.
Correct answer: Effector- A. Dopamine excess
- B. Norepinephrine deficiency
- C. Epinephrine excess
- D. Dopamine deficiency
Explanation: Dopamine deficiency in the brain leads to Parkinson's disease because dopamine is crucial for regulating movement and coordination, and…
Correct answer: Dopamine deficiency