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. Gibberellins
- B. Cytokinins
- C. Auxins
- D. All of these
Explanation: The correct answer is D, "All of these". Hormones, "auxins", "gibberellins", and "cytokinins", especially the first two, are well known to…
Correct answer: All of these- A. It is voluntary
- B. It is involuntary
- C. It is found in higher animals
- D. All of these options are correct
Explanation: Correct Answer is "A". Reflex action is an "involuntary" and almost instantaneous movement in response to a stimulus.
Correct answer: It is voluntary- A. Diurnal tempo
- B. Diurnal time
- C. Diurnal rhythms
- D. All of these
Explanation: "Diurnal rhythms" are the circadian rhythm synced with day and night (24 hours).
Correct answer: Diurnal rhythms- A. Spherical
- B. Mosquito
- C. Butterfly
- D. Rectangular
Explanation: Grey matter is shaped like the letter "H" or a "butterfly". The grey matter consists of neuron cell bodies and non-myelinated parts of the…
Correct answer: Butterfly- A. 2
- B. 4
- C. 6
- D. 8
Explanation: The spinal cord is divided into four different regions: the cervical, thoracic, lumbar, and sacral regions.
Correct answer: 4- A. Medulla
- B. Thalamus
- C. Hypothalamus
- D. Corpus callosum
Explanation: The thalamus, located centrally in the brain, is crucial for processing and relaying sensory information to the limbic system and…
Correct answer: Thalamus- A. Neck
- B. Spinal cord
- C. Blood vessels
- D. Skeleton
Explanation: The spinal cord is the centre for many reflexes, and it serves as a pathway for the conduction of impulses to and from different parts of…
Correct answer: Spinal cord- A. Hypothalamus
- B. Thalamus
- C. Cerebellum
- D. Cerebrum
Explanation: Option A: It plays a vital role in maintaining homeostasis by regulating various physiological functions such as body temperature, hunger…
Correct answer: Cerebrum- A. 16 pairs
- B. 20 pairs
- C. 31 pairs
- D. 33 pairs
Explanation: There are 31 pairs of spinal nerves in the human body. These nerves emerge from the spinal cord and pass through openings between adjacent…
Correct answer: 31 pairs- A. Brain and spinal cord
- B. Spinal nerves only
- C. Cerebellum and brain stem only
- D. Cerebrum and spinal column
Explanation: The central nervous system (CNS) includes the brain and the spinal cord, which are the control centres of the nervous system.
Correct answer: Brain and spinal cord- A. Ankle jerk
- B. Knee jerk
- C. Abdominal reflex
- D. Both A & B
Explanation: A superficial reflex is a type of reflex that is elicited by the stimulation of sensory receptors in the skin and mucous membranes.
Correct answer: Abdominal reflex- A. Sensory unit
- B. Motor unit
- C. Both A and B
- D. Cranial unit
Explanation: A sensory unit refers to the basic functional unit of the sensory system that is responsible for detecting and transmitting sensory…
Correct answer: Motor unit- A. Blood
- B. Interstitial fluid
- C. Intracellular fluid
- D. Cerebrospinal fluid
Explanation: Blood is a specialized bodily fluid that circulates throughout the body via the circulatory system, delivering oxygen and nutrients.
Correct answer: Cerebrospinal fluid- A. Membrane depolarisation
- B. An action potential
- C. Production of an IPSP
- D. Production of an EPSP
Explanation: Membrane depolarization refers to a change in the electrical charge across the cell membrane of a neuron or muscle cell, resulting in a…
Correct answer: Production of an IPSP- A. Sacrum
- B. Cranium
- C. Humerus
- D. Scapula
Explanation: The brain is produced by the "b) Cranium," which forms the protective bony enclosure for this vital organ.
Correct answer: Cranium- A. Gamma-glutamyltransferase
- B. Gamma-linolenic acid
- C. Gamma-Aminobutyric acid
- D. None of these
Explanation: The abundant inhibitory neurotransmitter found in the central nervous system (CNS) is "c) Gamma-Aminobutyric acid (GABA)." GABA is a…
Correct answer: Gamma-Aminobutyric acid- A. Peripheral nervous system
- B. Central nervous system
- C. Autonomic nervous system
- D. Circulatory system
Explanation: Reflex actions are involuntary actions that are controlled by the spinal cord, which is a part of the CNS.
Correct answer: Central nervous system- A. Frontal
- B. Parietal
- C. Temporal
- D. Occipital
Explanation: The occipital lobe is the back part of the brain that is involved with vision.
Correct answer: Occipital- A. Attached
- B. Open
- C. Fresh
- D. Delayed
Explanation: Cytokinins are a type of plant hormone that play a role in various physiological processes, including cell division, growth, and…
Correct answer: Fresh- A. Reflex
- B. Reflex arc
- C. Neuron
- D. Synapse
Explanation: A reflex action is an automatic, involuntary, and rapid response to a stimulus, so this is the correct answer.
Correct answer: Reflex