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. Brain
- B. Spinal cord
- C. Hypothalamus
- D. Pituitary
Explanation: The spinal cord serves as the primary center for coordinating reflex actions.
Correct answer: Spinal cord- A. B
- B. C
- C. D
- D. A
Explanation: Reflex arc refers to the pathway through which a reflex travels from the site of stimulus to sensory neuron to motor neuron to reflex…
Correct answer: B- A. Blinking of eyelids in bright light
- B. Pulling hand away from hot object
- C. Sneezing on tickling nose
- D. Picking pen to write name
Explanation: Reflex actions are involuntary responses to stimuli that occur rapidly and without conscious thought.
Correct answer: Picking pen to write name- A. Lungs
- B. Eyes
- C. Brain
- D. Bones
Explanation: Parkinson disease results from degeneration of dopamine-producing neurons in brain regions involved in movement control, especially the…
Correct answer: Brain- A. 2%
- B. 3%
- C. 7%
- D. 8%
Explanation: The adult human brain has a mass of roughly 1.3 to 1.4 kg, while average body mass is about 65 to 70 kg, giving approximately 1.3/65 x…
Correct answer: 2%- A. Thyroxin
- B. Triiodothyronine
- C. Calcitonin
- D. Glucagon
Explanation: The correct answer is Glucagon. Glucagon is secreted by the pancreas, not the thyroid gland.
Correct answer: Glucagon- A. Hypothalamus
- B. Pitutary gland
- C. Thyroid
- D. Parathyroid gland
Explanation: Hypothalamus is the part of the brain that releases a variety of hormones.
Correct answer: Hypothalamus- A. Respiratory system
- B. Nervous system
- C. Endocrine system
- D. Both b and c
Explanation: Animal coordination depends on both the nervous system, which sends rapid electrical signals, and the endocrine system, which releases…
Correct answer: Both b and c- A. Nociceptors respond to pressure
- B. Meissner's corpuscles are thermoreceptors
- C. Photoreceptors are depolarized in darkness and hyperpolarized in light
- D. Receptors do not produce graded potentials
Explanation: In the dark, photoreceptors remain depolarized; light causes hyperpolarization, reducing neurotransmitter release.
Correct answer: Photoreceptors are depolarized in darkness and hyperpolarized in light- A. Adrenaline
- B. Thyroid stimulating hormone (TSH)
- C. FSH (Follicle-stimulating hormone)
- D. Antidiuretic hormone (ADH)
Explanation: The posterior lobe of the pituitary gland produces two hormones, vasopressin (Antidiuretic hormone) and oxytocin.
Correct answer: Antidiuretic hormone (ADH)- A. Digestion of food
- B. Heart beat
- C. Contraction of pupil of eye
- D. Thought
- E. Breathing rate
Explanation: The autonomic nervous system does not directly control thought processes.
Correct answer: Thought- A. Brain
- B. Central nervous system
- C. Peripheral nervous system
- D. Somatic nervous system
Explanation: The explanation for this question is as follows: The CNS consists of the brain and the spinal cord, which are both protected in three…
Correct answer: Central nervous system- A. Syphilis is caused by a virus
- B. Syphilis affects the eyes, bones, joints, and CNS
- C. Genital herpes produces genital sores and ulcers
- D. Gonorrhea is caused by a gram-negative bacterium
Explanation: The correct answer is that 'Syphilis is caused by a virus,' which is incorrect because syphilis is actually caused by a bacterium…
Correct answer: Syphilis is caused by a virus- A. Spinal cord, axon, vertebra
- B. Cerebrum, cerebellum, pons
- C. Medula, pons, midbrain
- D. Thalamus, midbrain, pons
Explanation: This is the correct option. The correct composition of the brain stem is "Medulla, Pons, Midbrain."
Correct answer: Medula, pons, midbrain- A. Hair end organs
- B. Pacinian corpuscles
- C. Meissner's Corpuscles
- D. All of these options are correct
Explanation: Meissner's corpuscles respond to touch and low-frequency vibration. Ruffini endings detect stretch, deformation within joints, and warmth.
Correct answer: Meissner's Corpuscles- A. Monosynaptic reflex
- B. Blood and water
- C. Hemi Synaptic Reflex
- D. Blood and fluid
Explanation: The patellar reflex (also known as the knee-jerk reflex) and the Achilles reflex (also called the ankle reflex) are examples of "a)…
Correct answer: Monosynaptic reflex- A. It is voluntary
- B. It is involuntary
- C. It is found in higher animals
- D. It helps in protection from hot objects
Explanation: The statement "It is voluntary" is not true for reflex action. All the other options are true.
Correct answer: It is voluntary- A. Glucagon
- B. Epinephrine
- C. Thyroxin
- D. Estrogen
Explanation: Estrogen is a steroid hormone that plays a crucial role in the development and regulation of the female reproductive system.
Correct answer: Estrogen1499. Chemically hormones are:
- A. Carbohydrates
- B. Proteins
- C. Steroids
- D. Both B and C
Explanation: Option D is correct. Chemically, hormones are classified into two main types: Protein hormones.
Correct answer: Both B and C- A. Class Fish
- B. Class Amphibian
- C. Class Reptilia
- D. Class Mammalia
Explanation: Negative feedback mechanisms are a characteristic of Class Mammalia. A negative feedback mechanism is a regulatory process where the…
Correct answer: Class Mammalia