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. Swallowing
- B. Vision
- C. Memory
- D. Water balance
Explanation: The hypothalamus plays a crucial role in regulating water balance through the release of antidiuretic hormone (ADH) from the posterior…
Correct answer: Water balance- A. Dilates the branches
- B. Accelerates the heart beat
- C. Inhibits the digestive tract
- D. Contracts the pupils
Explanation: A few cranial nerves including the vagus nerve together with the nerves from the bottom portion of spinal cord, form the parasympathetic…
Correct answer: Contracts the pupils- A. A protein
- B. A poly-peptide
- C. An amino acid
- D. A steroid
Explanation: Cortisone is a steroid. Steroids are a class of organic compounds that have a specific molecular structure consisting of four rings of…
Correct answer: A steroid- A. Grave's disease
- B. Epilepsy
- C. Alzheimer's disease
- D. Acromegaly
Explanation: Acromegaly is a disorder caused by excessive growth hormone (GH) production, often due to a pituitary gland tumor.
Correct answer: Acromegaly- A. Cortisol hormone
- B. Adrenocorticotrophic hormone
- C. Luteinising hormone
- D. Melanophore stimulating hormone
Explanation: Addison's disease is primarily characterized by a deficiency in cortisol production.
Correct answer: Melanophore stimulating hormone- A. Trypsin
- B. Glucagon
- C. Insulin
- D. Lipase
Explanation: Insulin is the hormone secreted by the β cells of the pancreas. It is essential for regulating blood glucose levels by facilitating the…
Correct answer: Insulin- A. Increasing glycogen synthesis
- B. Increasing cell utilization of glucose
- C. Both A and B
- D. Stimulating conversion of glucose into lipids and proteins
Explanation: This is the correct answer. Insulin depresses blood glucose levels through both increasing glycogen synthesis and enhancing the cellular…
Correct answer: Both A and B- A. Development of secondary sexual characters in females
- B. Prevention of ripening of follicles
- C. Suppressing ovulation
- D. Thickening and visualization of uterine wall
Explanation: Estrogen is responsible for the development of female secondary sexual characteristics, such as breast development, the distribution of…
Correct answer: Development of secondary sexual characters in females- A. Both help in co-ordination of body
- B. Both release messenger chemicals in extra cellular spaces of the body
- C. Both are homeostatic in function
- D. Both show response to a stimulus instantly
Explanation: This is not correct. The nervous system is known for its ability to initiate rapid responses to stimuli, often within milliseconds.
Correct answer: Both show response to a stimulus instantly- A. Kohler
- B. Uexkull
- C. Pavlov
- D. Lorenz
Explanation: Pavlov conditioned the dogs to secrete saliva on the ringing of the bell, which is not a normal stimulus for the secretion of saliva.
Correct answer: Pavlov551. Which of the following ions is conserved by aldosterone by preventing its loss from kidney tubules?
- A. Na+
- B. Ca++
- C. Mg++
- D. K+
Explanation: Aldosterone primarily acts to conserve sodium ions (Na+) in the kidney tubules by promoting their reabsorption from the urine back into…
Correct answer: Na+- A. Hydra
- B. Planaria
- C. Auditory relay centre
- D. 12 pairs
Explanation: Hydra is a genus of small, freshwater organisms belonging to the phylum Cnidaria.
Correct answer: Hydra- A. 12 pairs
- B. Auditory relay centre
- C. Planaria
- D. Hydra
Explanation: The auditory relay center includes structures such as the inferior colliculus and medial geniculate nucleus (part of the thalamus), which…
Correct answer: Auditory relay centre- A. Planaria
- B. Auditory relay centre
- C. 12 pairs
- D. Hydra
Explanation: This option directly corresponds to cranial nerves. Humans have 12 pairs of cranial nerves, which are key components of the nervous…
Correct answer: 12 pairs- A. Hydra
- B. Auditory relay centre
- C. Planaria
- D. Parkinson's disease
Explanation: L-DOPA is closely related to Parkinson's disease. Parkinson's disease is a neurodegenerative disorder characterized by a deficiency of…
Correct answer: Parkinson's disease- A. Ethene
- B. Ridges of fingertips
- C. Short supply of minerals in soil
- D. Pain
Explanation: This option is directly related to chlorosis. A short supply of essential minerals in the soil, such as iron, nitrogen, magnesium, and…
Correct answer: Short supply of minerals in soil- A. Short supply of minerals in soil
- B. Ridges of fingertips
- C. Pain
- D. Breaks bud dormancy
Explanation: This option is closely related to ethene. Ethene plays a role in breaking bud dormancy, particularly in woody plants.
Correct answer: Breaks bud dormancy- A. Equilibrium
- B. Short supply of minerals in soil
- C. Pain
- D. Ridges of fingertips
Explanation: Mechanoreceptors are indeed involved in maintaining equilibrium, particularly through their role in the vestibular system of the inner…
Correct answer: Equilibrium- A. Breaks bud dormancy
- B. Ridges of fingertips
- C. Pain
- D. Short supply of minerals in soil
Explanation: Meissner's corpuscles are located in the dermal papillae of the skin, particularly in areas like the fingertips, where tactile sensitivity…
Correct answer: Ridges of fingertips560. Thyroid gland:
- A. Calcitonin
- B. Water retention by kidneys
- C. Sugar in urine
- D. Kinesis
Explanation: Calcitonin is a hormone produced by the thyroid gland, specifically by the parafollicular cells (or C cells) of the thyroid.
Correct answer: Calcitonin