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.
Last updated
1,687 questions · page 48 of 85
- A. 1 millisecond
- B. 1 microsecond
- C. 1 second
- D. 1 minute
Explanation: In a typical nerve, the action potential duration is about 1 ms. In skeletal muscle cells, the action potential duration is approximately…
Correct answer: 1 millisecond- A. Outer surface of neuron is more positive
- B. Inner surface of neuron is more positive
- C. Both of these surfaces are equally positive
- D. Both of these surfaces are equally negative
Explanation: The outer surface is more positive than the inside due to a greater quantity of +ve ions in the outer environment.
Correct answer: Outer surface of neuron is more positive- A. 0.01 volts
- B. 0 02 Volts
- C. 0.05 Volts
- D. 0.07 Volts
Explanation: The action potential of a neuron typically peaks at around 0.05 V (or 50 mV) during the depolarization phase, which is the rapid increase…
Correct answer: 0.05 Volts- A. Synaptic knob of synapse
- B. Reflex actions
- C. Neurotransmitters
- D. Acetylcholinesterase
Explanation: Neurotransmitters: Correct, as neurotransmitters are the chemical messengers that transmit signals across the synapse between neurons.
Correct answer: Neurotransmitters- A. Meisener Corpuscles
- B. Pacinian Corpuscles
- C. Red Blood Corpuscles
- D. Cholesterol
Explanation: A Pacinian corpuscle is a type of deep-pressure and vibration-sensitive nerve ending in the skin and other tissues that responds to…
Correct answer: Pacinian Corpuscles- A. 0.2 nm
- B. 2 nm
- C. 20 nm
- D. 200 nm
Explanation: Option A is correct. The size of a synaptic cleft in an electrical synapse is typically 0.2 nm, which is much smaller compared to the…
Correct answer: 0.2 nm- A. Pons
- B. Cerebellum
- C. Olfactory bulb
- D. Hippocampus
Explanation: The activities like sleeping, walking, and dreaming are controlled by the pons.
Correct answer: Pons- A. Thyroid gland
- B. Parathyroid gland
- C. Pancreas
- D. Adrenal gland
Explanation: Option A is correct. The hormone calcitonin is secreted by the thyroid gland.
Correct answer: Thyroid gland- A. Competition between members of the same species
- B. Competition between members of the different species
- C. Environmental struggle
- D. Prey or predation
Explanation: Option A is correct. Intra-specific struggle refers to competition between members of the same species.
Correct answer: Competition between members of the same species- A. Antidiuretic hormones
- B. Growth hormone
- C. Estrogen
- D. Prolactin
Explanation: Option A is correct. The posterior lobe of the pituitary gland releases antidiuretic hormone (ADH). ADH is also known as vasopressin.
Correct answer: Antidiuretic hormones- A. Bolus
- B. Bile
- C. Pancreatic juice
- D. Saliva
Explanation: Option D is correct. Mastication causes exocrine glands under the tongue and in the back of the mouth to secrete a watery liquid called…
Correct answer: Saliva- A. Saltatory impulse
- B. Continuous impulse
- C. Rapid impulse
- D. Jumping impulse
Explanation: Option B is correct. The type of nerve impulse that occurs in non-myelinated neuron fibers is a continuous impulse.
Correct answer: Continuous impulse- A. Commissural impulses
- B. Integrating impulses
- C. Sensory impulses
- D. Voluntary motor impulses
Explanation: Peripheral motor nerves carry motor impulses from the spinal cord to voluntary muscles.
Correct answer: Voluntary motor impulses- A. Only rods are present
- B. More rods than cones are found
- C. High density of cones occurs, but it has no rods
- D. An equal number of rods and cones
Explanation: The fovea is the part of the retina with the highest concentration of cones, responsible for sharp central vision and color perception.
Correct answer: High density of cones occurs, but it has no rods- A. Tectorial membrane
- B. Organ of corti
- C. Cochlea
- D. Vestibular apparatus
Explanation: The vestibular apparatus is present in the ear. It forms the labyrinth of the inner ear in association with the cochlea.
Correct answer: Vestibular apparatus- A. Alzheimer's disease
- B. Cystic fibrosis
- C. Sickle cell anemia
- D. Phenylketonuria
Explanation: Alzheimer's disease is a neurodegenerative disorder that is most commonly associated with aging.
Correct answer: Alzheimer's disease- A. Sulcus, Fissure
- B. Fissure, Sulcus
- C. Gyrus, Fissure
- D. Fissure, Gyrus
Explanation: In the cerebrum, the outer layer of the brain, there are folds and grooves that increase the surface area.
Correct answer: Sulcus, Fissure- A. Influx of sodium ions across the postsynaptic membrane
- B. Outflow of sodium ions across the postsynaptic membrane
- C. Outflow of calcium ions across the postsynaptic membrane
- D. Influx of potassium ions across the postsynaptic membrane
Explanation: When an excitatory neurotransmitter binds to its receptor on the postsynaptic neuron, it triggers an influx of sodium ions (Na+) across…
Correct answer: Influx of sodium ions across the postsynaptic membrane- A. Prolactin
- B. Thyroxin
- C. Aldosterone
- D. Insulin
Explanation: Prolactin is a hormone produced by the pituitary gland that plays a crucial role in lactation and breastfeeding.
Correct answer: Prolactin- A. 12 pairs
- B. 24 pairs
- C. 31 pairs
- D. 62 pairs
Explanation: There are 12 pairs of cranial nerves in the human body, which emerge from the brain and brainstem.
Correct answer: 12 pairs