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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361. Select the option which correctly matches the endocrine gland with its hormone and its function :
- A. Option A: Thyroid gland - Insulin - Regulates blood sugar levels
- B. Option B: Adrenal gland - Estrogen - Regulates female reproductive system
- C. Option C: Testis - Testosterone - Develops male characteristics
- D. Option D: Pancreas - Thyroxine - Regulates metabolism
Explanation: Testis are produced by testosterone. The testes are the male reproductive glands that produce sperm for fertilization and the hormone…
Correct answer: Option C: Testis - Testosterone - Develops male characteristics- A. Anterior lobe of the pituitary
- B. Middle lobe of pituitary
- C. Posterior lobe of the pituitary
- D. Endostyle
Explanation: Option B is correct.The middle lobe of the pituitary secretes a hormone named melanocyte-stimulating hormone.
Correct answer: Middle lobe of pituitary- A. Growth of body
- B. Body metabolism
- C. Glucose breakdown
- D. Heat production
Explanation: STH stands for Somatotropin, also known as Growth Hormone (GH), which is produced by the anterior pituitary gland.
Correct answer: Growth of body- A. Prolactin, Thyroid Stimulating Hormone, Somatotropin Hormone
- B. Follicle Stimulating Hormone, Luteinizing Hormone, Prolactin
- C. Adrenocorticotropic Hormone, Luteinizing Hormone, Follicle Stimulating Hormone
- D. Luteinizing Hormone, Follicle Stimulating Hormone, Thyroid Stimulating Hormone
Explanation: Gonadotropins are glycoprotein hormones secreted by gonadotropic cells of the anterior pituitary gland.
Correct answer: Follicle Stimulating Hormone, Luteinizing Hormone, Prolactin- A. Receptor → 2nd messenger → Activation of energy
- B. 2nd messenger → Receptor → Activation of energy
- C. Receptor → Activation of energy → 2nd messenger
- D. . Activation of energy → 2nd messenger → Receptor
Explanation: Water soluble hormones binds to the receptors on the plasma membrane which passes them.through the second messengers which results in the…
Correct answer: Receptor → 2nd messenger → Activation of energy- A. Swallowing of food
- B. Pupillary reflex
- C. Peristalsis of intestine
- D. Knee-jerk response
Explanation: The autonomic nervous system controls peristalsis via the mesenteric plexus sympathetic fibers decrease, and parasympathetic fibers…
Correct answer: Peristalsis of intestine- A. Acetylcholine
- B. Norepinephrine
- C. Dopamine
- D. GABA
Explanation: Parkinson's disease results from the loss of dopamine-producing neurons in the substantia nigra, leading to impaired movement control.
Correct answer: Dopamine- A. Tongue movements
- B. Gastrointestinal movements
- C. Pancreatic secretion
- D. Cardiac movements
Explanation: The vagus nerve supplies the heart, lungs, and digestive tract but does not control tongue movement, which is handied by the hypoglossal…
Correct answer: Tongue movements- A. Constant bridge
- B. Junction point
- C. A joint
- D. A synapse
Explanation: A synapse is the functional junction between two neurons separated by a tiny synaptic cleft (-200 A).
Correct answer: A synapse- A. Neurons
- B. Myelin sheath
- C. Axons
- D. Dendrites
Explanation: Neurons are the structural and functional units of the nervous system. Each neuron consists of a cell body, a xon, sendritas, specialized…
Correct answer: Neurons- A. DNA
- B. RNA
- C. Ribosome
- D. Protein
Explanation: Nissl's granules (or Nissl bodies) are clusters of rough endoplasmic reticulum and ribosomes found in neurons.
Correct answer: Ribosome- A. Rhodopsin
- B. Melanin
- C. Sclerotin
- D. Retinol
Explanation: Rhodopsin is a light-sensitive pigment in the rod cells of the retina. It consists of opsin (protein) and retinal (vitamin A derivative)…
Correct answer: Rhodopsin- A. Effector organs to CNS
- B. Receptors to CNS
- C. CNS to receptors
- D. CNS to muscles
Explanation: Afferent (sensory) fibers transmit impulses from receptors (like skin, eyes, etc] to the central nervous system for processing.
Correct answer: Receptors to CNS- A. Effectors
- B. Nerve
- C. Stimulators
- D. Brain
Explanation: Effectors are organs like muscles or glands that produce a response to a stimulus by contracting or secreting substances when signaled by…
Correct answer: Effectors- A. Chemoreceptors
- B. Photoreceptors
- C. Mechanoreceptors
- D. Thermoreceptors
Explanation: Mechanoreceptors are sensory receptors that detect mechanical pressure, touch, and vibration, converting them into nerve impulses for…
Correct answer: Mechanoreceptors- A. Paccinian corpuscles
- B. Mechanoreceptors
- C. Merkel disks
- D. Both B and C
Explanation: Merkel disks and other mechanoreceptors detect touch and pressure, converting mechanical stimuli into nerve impulses for the brain to…
Correct answer: Both B and C- A. Microglia
- B. Oligodendrocytes
- C. Astrocytes
- D. Schwann cell
Explanation: Schwann cells are glial cells in the peripheral nervous system that wrap around axons to form the myelin sheath, which insulates the axon…
Correct answer: Schwann cell- A. Brain
- B. Spinal cord
- C. Sensory organs
- D. Effectors
Explanation: The brain contains the highest number of neuron cell bodies. Spinal cord has fewer, and ganglia of the peripheral nervous system also…
Correct answer: Brain- A. Dendron
- B. Axon
- C. Dendrite
- D. Soma
Explanation: Dendron is a single, long protoplasmic extension of a neuron that carries impulses toward the cell body.
Correct answer: Dendron- A. Composed of specialized lipids
- B. Responsible for saltatory conduction
- C. Conduct impulses
- D. Absent on nodes of Ranvier
Explanation: The myelin sheath does not conduct impulses. It insulates the axon, speeding conduction through saltatory conduction.
Correct answer: Conduct impulses