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. Thalamus
- B. Hypothalamus
- C. Amygdala
- D. Hippocampus
Explanation: Explanation for this question will be added soon!
Correct answer: Hypothalamus- A. Thalamus
- B. Hypothalamus
- C. Cerebral cortex
- D. Cerebellum
Explanation: The thalamus serves as a sensory relay station in the brain, filtering and directing incoming sensory information to the appropriate areas…
Correct answer: Thalamus- A. Thalamus
- B. Hypothalamus
- C. Amygdala
- D. Cerbellum
Explanation: The cerebellum coordinates muscle movement by integrating sensory inputs from various sources, including proprioceptive feedback and…
Correct answer: Cerbellum- A. Thalamus
- B. Brain stem
- C. Hippocampus
- D. Cerebellum
Explanation: The brainstem plays a vital role in sleeping and waking due to its regulation of arousal and consciousness levels.
Correct answer: Brain stem- A. 31 spinal and 12 cranial nerve pairs
- B. 33 spinal and 12 cranial nerve pairs
- C. 12 spinal and 31 cranial nerve pairs
- D. 31 spinal and 31 cranial nerve pairs
Explanation: The Peripheral Nervous System (PNS) in humans consists of:1. Cranial nerves: 12 pairs of nerves that emerge directly from the brain and…
Correct answer: 31 spinal and 12 cranial nerve pairs- A. Chemoreceptors
- B. Photoreeptors
- C. Mechanoreceptors
- D. Nociceptors
Explanation: Mechanoreceptors are sensory receptors that respond to mechanical stimuli such as pressure, touch, stretch, and vibration, converting…
Correct answer: Mechanoreceptors- A. Free nerve ending
- B. Stray nerve endings
- C. Blind nerve ending
- D. Encapsulated nerve ending
Explanation: Nociceptors have free nerve endings to maximize sensitivity to potentially harmful stimuli such as pain, temperature extremes, and tissue…
Correct answer: Free nerve ending- A. Free nerve ending
- B. Hot
- C. Cold
- D. Encapsulated nerve ending
Explanation: Meissner corpuscles are encapsulated nerve endings to enhance sensitivity to light touch and low-frequency vibrations.
Correct answer: Encapsulated nerve ending- A. Caloreceptors
- B. Frigdoreceptors
- C. Baroreceptors
- D. Nociceptors
Explanation: Baroreceptors(Thermoreceptors) detect changes in blood pressure by monitoring the stretch or distortion of arterial walls.
Correct answer: Baroreceptors- A. Sensory
- B. Motor
- C. Mixed
- D. All (A), (B) and (C)
Explanation: The dorsal root of the spinal cord contains sensory nerves responsible for transmitting sensory information from the peripheral nervous…
Correct answer: Sensory- A. Sympathetic
- B. Parasympathetic
- C. Vagus nerve
- D. Somatic nerve
Explanation: The sympathetic nervous system initiates the "fight or flight" response by releasing adrenaline and noradrenaline into the bloodstream…
Correct answer: Sympathetic- A. Nicotine
- B. Acetylcholine
- C. Serotonin
- D. Dopamine
Explanation: Parkinson's disease is characterized by a loss of dopamine-producing neurons in the brain's substantia nigra.
Correct answer: Dopamine- A. Dementia
- B. Hallucination
- C. Delusions
- D. All (A), (B) and (C)
Explanation: Alzheimer's disease is a form of dementia characterized by progressive cognitive decline, memory loss, and impaired thinking…
Correct answer: All (A), (B) and (C)- A. Are ductless
- B. Release enzymes
- C. Release neurotransmitters
- D. Release their contents out of the body
Explanation: Endocrine glands are ductless because they secrete hormones directly into the bloodstream.
Correct answer: Are ductless- A. Thyroid
- B. Thymus
- C. Panereas
- D. Pituitary
Explanation: Yes, Islets of Langerhans are present in the pancreas. They consist of clusters of hormone-producing cells, including alpha cells…
Correct answer: Panereas- A. Parathyroid
- B. Adrenal cortex
- C. Hypothalamus
- D. Posterior pituitary
Explanation: Cortisol is released by the adrenal cortex in response to stress and low blood glucose levels.
Correct answer: Adrenal cortex- A. ADH
- B. GnRH
- C. LH
- D. PTH
Explanation: Parathyroid hormone (PTH) stimulates the release of calcium from bones into the bloodstream to maintain normal calcium levels.
Correct answer: PTH- A. Thyroid; sodium
- B. Pituitary; water
- C. Adrenal; sodium
- D. Thymus; white blood cells
Explanation: Aldosterone is produced by the adrenal gland to regulate sodium reabsorption in the kidneys.
Correct answer: Adrenal; sodium- A. Calcitonin
- B. Glucagon
- C. Adrenalin
- D. Thyroxine
Explanation: Calcitonin lowers blood calcium levels by inhibiting bone resorption. It acts on osteoclasts, reducing their activity and decreasing the…
Correct answer: Calcitonin- A. Goiter
- B. Diabetes
- C. Infertility
- D. Gigantism
Explanation: Oversecretion of Somatotropin hormone (GH) leads to gigantism because it stimulates excessive growth of bones and tissues, particularly…
Correct answer: Gigantism