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. Nerve cell
- B. Reflex arc
- C. Receptor cells
- D. Mixed nerve
Explanation: A reflex arc is a neural pathway that controls a reflex. In vertebrates, most sensory neurons do not pass directly into the brain but…
Correct answer: Reflex arc- A. Medulla oblongata
- B. Mediastinum of the upper thorax
- C. Both A and B
- D. None of these
Explanation: The thymus gland is a small, two-lobed organ that is located in the upper chest, between the lungs, and behind the breastbone (sternum).
Correct answer: Mediastinum of the upper thorax- A. Ankle jerk
- B. Knee jerk
- C. Abdominal reflex
- D. Both Options A and B are correct
Explanation: Option A: Ankle jerk is an example of a deep tendon reflex, which is elicited by tapping the Achilles tendon with a reflex hammer.
Correct answer: Abdominal reflex- A. 10-20 cm
- B. 20-30 cm
- C. 40-50 cm
- D. 60-90 cm
Explanation: The spinal cord is about 18 inches (45 centimetres) in length and is relatively cylindrical.
Correct answer: 40-50 cm- A. -70 mV
- B. -120 mV
- C. 0.05 V
- D. Both Options A and B are correct
Explanation: The resting membrane potential of a neuron is about -70 mV. The negative sign means that the inside of the neuron is 70 mV less than the…
Correct answer: -70 mV- A. Brain stem
- B. Cerebrum
- C. Cerebellum
- D. Diencephalon
Explanation: The forebrain is further divided into the diencephalon and telencephalon. The diencephalon consists of the thalamus and hypothalamus.
Correct answer: Diencephalon- A. Acetylcholine
- B. Adrenaline
- C. Estradiol
- D. Testosterone
Explanation: Acetylcholine is the neurotransmitter discharged at the neuromuscular junction.
Correct answer: Acetylcholine- A. Monosynaptic reflex
- B. Polysynaptic reflex
- C. Hemisynaptic reflex
- D. Both Options A and B are correct
Explanation: The patellar reflex is also termed as knee jerk. The Achilles reflex is also similar to the patellar reflex.
Correct answer: Monosynaptic reflex- A. White matter
- B. Gray matter
- C. Lumbar enlargement
- D. Cervical enlargement
Explanation: Gray matter in the spinal cord is neural tissue that is dominated by the cell bodies of neurons, neuroglia, and unmyelinated axons and…
Correct answer: Gray matter- A. Sensory neuron
- B. Motor neuron
- C. Connector neuron
- D. All of these options are correct
Explanation: It is a fact that the spinal cord has all types of neurons. Hence, option D is the correct option.
Correct answer: All of these options are correct- A. Synapses
- B. Saltatory conduction
- C. Resting potential
- D. Membrane potential
Explanation: Saltatory conduction is the propagation of action potentials along myelinated axons from one node of Ranvier to the next node, increasing…
Correct answer: Saltatory conduction- A. Neurotransmitters
- B. Hormones
- C. Chemoreceptors
- D. Enzymes
Explanation: Neurotransmitters are often referred to as the body's chemical messengers.
Correct answer: Neurotransmitters- A. Ca level
- B. Sugar level
- C. Na level
- D. Mg level
Explanation: Parathyroid hormone is mainly controlled by the negative feedback of calcium levels in the blood to the parathyroid glands.
Correct answer: Ca level- A. Thermoreceptors
- B. Photoreceptors
- C. Mechanoreceptors
- D. Chemoreceptors
Explanation: The taste receptors are located around the small structures known as papillae found on the upper surface of the tongue; these are…
Correct answer: Chemoreceptors715. A neuron located in the central nervous system that projects its axon outside the CNS is called:
- A. Motor nerve
- B. Sensory nerve
- C. Both Options A and B are correct
- D. Mixed nerve
Explanation: Motor neurons (also referred to as efferent neurons) are the nerve cells responsible for carrying signals away from the central nervous…
Correct answer: Motor nerve- A. Voluntary action
- B. Involuntary action
- C. Saltatory conduction
- D. None of these options is correct
Explanation: A reflex action is an automatic (involuntary) and rapid response to a stimulus, which minimizes any damage to the body from potentially…
Correct answer: Involuntary action- A. Forebrain
- B. Cerebrum
- C. Cerebellum
- D. Brainstem
Explanation: Option D is correct as the brain stem, which is made up of the midbrain, pons, and medulla, connects the cerebrum with the spinal cord.
Correct answer: Brainstem- A. Hair end organs
- B. Pacinian corpuscles
- C. Meissner's Corpuscles
- D. All of these
Explanation: Meissner's corpuscles (or tactile corpuscles) are a type of mechanoreceptor. They are touch receptors.
Correct answer: Meissner's Corpuscles- A. Motor
- B. Sensory
- C. Both A and B
- D. Mixed
Explanation: The neurons responsible for converting various external stimuli that come from the environment into corresponding internal stimuli are…
Correct answer: Sensory- A. White matter
- B. Gray matter
- C. Reflex arc
- D. Medulla
Explanation: The gray matter is the dark outer portion, whereas the white matter is the inner lighter portion of the brain, so the correct answer is B.
Correct answer: Gray matter