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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821. Who was the first to propose an objective definition of instincts in terms of animal behaviour?
- A. Wallace
- B. Lamark
- C. Lyell
- D. Darwin
Explanation: Darwin used the word instinct in several different ways to refer to what impels a bird to breed; to a disposition, such as courage or…
Correct answer: Darwin- A. Thalamus
- B. Brain stem
- C. Hypothalmus
- D. Cerebellum
Explanation: C is correct, as along with other functions like regulating body temperature and appetite, the hypothalamus is also responsible for…
Correct answer: Hypothalmus- A. Autonomic reflex arc
- B. Somatic reflex arc
- C. Both A and B
- D. None of these
Explanation: In order to solve such questions, the candidate first must know the difference between Somatic and Autonomic.
Correct answer: Somatic reflex arc- A. 8
- B. 10
- C. 12
- D. 15
Explanation: In total, there are 31 pairs of spinal nerves grouped regionally by spinal region.
Correct answer: 12- A. 2
- B. 4
- C. 6
- D. 8
Explanation: Option B is correct as the spinal cord is divided into "4 parts": cervical, thoracic, lumbar, and sacral.
Correct answer: 4- A. White matter
- B. Gray matter
- C. Reflex arc
- D. Medulla
Explanation: The lighter, inner section of the brain is called white matter. It is made up of nerve fibres that connect different parts of the brain.
Correct answer: White matter- A. Thalamus
- B. Amygdala
- C. Hypothalamus
- D. Cerebellum
Explanation: The hypothalamus contains the primary control centers for thermoregulation (body temperature regulation) and osmoregulation (fluid balance…
Correct answer: Hypothalamus- A. Potassium ion gradient
- B. Sodium ion gradient
- C. Bicarbonate ion gradient
- D. None of these
Explanation: Option A is correct since the typical resting membrane potential of a cell arises from the separation of potassium ions (intracellular…
Correct answer: Potassium ion gradient- A. Cranium
- B. Meninges
- C. Skull
- D. Ventricles
Explanation: The correct answer is Option B: Meninges. The meninges are layers of protective tissue that cover the brain and spinal cord.
Correct answer: Meninges- A. Cerebellum
- B. Cerebrum
- C. Medulla
- D. Thalamus
Explanation: The cerebellum is the part of the brain that is best developed in birds.
Correct answer: Cerebellum- A. Accumulation of toxic waste products in leaves
- B. Deficiency of chlorophyll
- C. Short supplies of mineral nutrients in the soil
- D. All of these
Explanation: Chlorosis can result from any of the following: the accumulation of waste products in leaves, a deficiency of chlorophyll, or a short…
Correct answer: All of these- A. 5
- B. 10
- C. 15
- D. 20
Explanation: In total, there are 31 pairs of spinal nerves grouped regionally by spinal region.
Correct answer: 5833. Which portion of the brain is primarily responsible for processing and interpreting information?
- A. White matter
- B. Gray matter
- C. Medulla
- D. All A,B and C
Explanation: Gray matter refers to the part that has the ganglia, the cell bodies, where the processing and interpreting occur.
Correct answer: Gray matter- A. Cerebral cortex
- B. Limbic system
- C. Brain stem
- D. Thalamus
Explanation: The cerebral cortex is the part of the brain that controls conscious activities: it has three areas, sensory, motor, and association.
Correct answer: Cerebral cortex- A. Sensory neuron
- B. Motor neuron
- C. Mixed neuron
- D. Spinal neuron
Explanation: The ventral root of the spinal cord contains the axons of motor neurons.
Correct answer: Motor neuron- A. Temperature
- B. Oxygen
- C. Transpiration
- D. Internal clock in guard cells
Explanation: Option D is correct since the daily rhythmic opening and closing of 'stomata' is due to an internal clock located in guard cells.
Correct answer: Internal clock in guard cells- A. Forebrain
- B. Midbrain
- C. Hindbrain
- D. Limbic system
Explanation: Option B is correct since the midbrain contains the reticular formation, which is a relay center connecting the hindbrain with the…
Correct answer: Midbrain- A. Relay neuron
- B. Sensory neuron
- C. Mixed neuron
- D. Synapse
Explanation: Relay neurons, also known as interneurons or association neurons, are found entirely within the CNS and act as intermediaries between…
Correct answer: Relay neuron- A. To act on external environment
- B. To regulate the internal environment
- C. To transmit motor information to the brain
- D. None of these
Explanation: Option B is correct since the 'Peripheral Nervous System' is divided into two systems: the 'autonomic nervous system', which regulates…
Correct answer: To regulate the internal environment- A. Addison's
- B. Alzheimer's
- C. Parkinson's
- D. Crohn's
Explanation: In Addison's disease, the adrenal glands do not produce enough hormones (including cortisol).
Correct answer: Addison's