What is the main effect of glucagon on blood glucose concentration?
Correct answer A. It raises blood glucose by stimulating glycogen breakdown in the liver
Topic / 72 questions
Coordination and Control MCQs
Coordination and Control MCQs are multiple-choice questions on how organisms detect and respond to change, covering receptors, neurons, nerve impulses, synapses, reflexes, the human brain and chemical coordination by hormones. Every question on MCQs360 shows the correct answer instantly, so you can test yourself on each part of the nervous and endocrine systems.
- Biological Molecules 74
- Coordination and Control 72
- Biology Diagnostic 70
- Cell Structure and Function 67
- Biotechnology 65
- Reproduction 58
- Bioenergetics 55
- Circulation 50
- Inheritance 48
- Digestion 45
- Immunity 45
- Support and Movement 45
- Acellular Life (Viruses) 45
- Homeostasis 45
- Respiration and Gaseous Exchange 45
- Evolution 45
- Enzymes 45
- Cell Cycle 41
- Chromosome and DNA 40
- Biology Introduction 38
- Ecosystem 27
Why are sensory receptors described as transducers?
Correct answer B. They convert the energy of a stimulus into electrical nerve impulses
Which receptors in the retina convert light energy into nerve impulses?
Correct answer D. Rods and cones
Advertisement
Which cells form the myelin sheath around axons in the peripheral nervous system?
Correct answer A. Schwann cells
Why do impulses travel faster along myelinated axons than along non-myelinated axons of the same diameter?
Correct answer B. Depolarisation jumps from one node of Ranvier to the next
In which direction do dendrites normally carry nerve impulses?
Correct answer A. Towards the cell body
Which best defines a nerve impulse?
Correct answer B. A wave of depolarisation (action potential) travelling along a neuron
What causes the rapid depolarisation phase of an action potential?
Correct answer C. Opening of voltage-gated Na⁺ channels and inflow of Na⁺
Which event mainly brings about repolarisation of a neuron after an action potential?
Correct answer B. Outflow of K⁺ through voltage-gated potassium channels
Advertisement
What is one important consequence of the refractory period of a neuron?
Correct answer D. Impulses travel in one direction only along the axon
What triggers the release of neurotransmitter from a presynaptic knob?
Correct answer C. Entry of Ca²⁺ ions when the action potential arrives
What is the role of acetylcholinesterase at a cholinergic synapse?
Correct answer C. Hydrolysing acetylcholine so that stimulation of the postsynaptic membrane stops
Why can a synapse transmit impulses in one direction only?
Correct answer A. Neurotransmitter is released only from the presynaptic side and receptors are only on the postsynaptic side
What is the correct sequence of components in a withdrawal reflex arc?
Correct answer D. Receptor → sensory neuron → relay neuron → motor neuron → effector
Which hormone, secreted by the adrenal medulla, prepares the body for a ‘fight or flight’ response?
Correct answer D. Adrenaline
Advertisement
A lack of iodine in the diet leads to enlargement of which gland?
Correct answer D. Thyroid
Which part of the brain contains centres for reflex movements of the head and eyes in response to sudden sounds and visual stimuli?
Correct answer D. Midbrain
Which of the following together make up the brainstem?
Correct answer D. Midbrain, pons and medulla oblongata
Which part of the brain is responsible for intelligence, memory, reasoning and voluntary actions?
Correct answer B. Cerebrum
Which part of the brainstem contains centres controlling breathing rate and heart rate?
Correct answer D. Medulla oblongata
About Coordination and Control MCQs
The nervous coordination questions cover receptors as transducers, the structure of neurons with their cell body, dendrites, axon and myelin sheath, and the resting and action potentials, including the sodium-potassium pump and the ion movements during depolarisation and repolarisation. Synapse, reflex and reflex arc questions follow, along with nervous systems in simple animals such as planaria. The brain section asks about the forebrain, midbrain and hindbrain, the cerebrum, cerebellum, brainstem and hypothalamus, and the function of each part. Chemical coordination questions cover endocrine glands and their hormones and disorders, and there are also questions on plant hormones such as auxins, gibberellins and abscisic acid from the wider FSc course.
Key facts to remember
- The resting membrane potential of a neuron is about -70 mV.
- The sodium-potassium pump moves three sodium ions out of the neuron for every two potassium ions it moves in, using ATP.
- Repolarisation after an action potential is mainly caused by potassium ions diffusing out of the neuron.
- The cerebrum is the largest part of the human brain and the cerebellum is the second largest.
- The brainstem is made up of the midbrain, pons and medulla oblongata.
- Adrenaline, secreted by the adrenal medulla, prepares the body for the fight or flight response.
Exams that include Coordination and Control MCQs
Pakistan
- MDCAT
- NUMS
- AKU
- FSc boards
India
- NEET
Bangladesh
- HSC
- Medical Admission Test
How to prepare for Coordination and Control MCQs
- Draw an action potential graph and label each phase with the ion movement that causes it.
- Learn the parts of a reflex arc in order: receptor, sensory neuron, interneuron, motor neuron and effector.
- Make a table of brain regions with their main functions, such as balance and posture for the cerebellum.
- List endocrine glands with their hormones and the disorders caused by too much or too little of each.
Frequently asked questions
Which exams ask Coordination and Control MCQs?
In Pakistan, Coordination and Control questions appear in MDCAT, the NUMS and AKU entry tests and FSc board papers. Students in India meet the same content in NEET, and in Bangladesh it is tested in HSC Biology and the Medical Admission Test.
What is a reflex arc?
A reflex arc is the pathway of a reflex action. A receptor detects a stimulus, a sensory neuron carries the impulse to the spinal cord or brain, an interneuron passes it on, and a motor neuron carries it to an effector, such as a muscle, which responds quickly and automatically.
What are the functions of the cerebellum?
The cerebellum coordinates voluntary muscle movements, keeps the body balanced and maintains posture. It makes movements smooth and precise, which is why damage to it causes unsteady walking and poorly controlled movements, even though muscle strength may be normal.
Last reviewed October 2026