87 public questions tagged with this topic.
The spinal cord controls reflex actions in frogs, bypassing the brain for quick responses. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Ref: NCERT Biology Textbook for Class XI and XII (Zoology section), Chapter: Structural Organisation in Animals and Frog, Topic: Tissues, skeletal and organ systems.
The autonomic nervous system regulates involuntary functions such as digestion, respiration, and heart rate. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Ref: NCERT Biology Textbook for Class XI and XII (Zoology section), Chapter: Human Physiology - Digestion, Respiration, Circulation, Neural Control and Chemical Coordination, Topic: Organ system functions and hormonal regulation.
The parasympathetic nervous system promotes relaxation, digestion, and energy conservation. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Ref: NCERT Biology Textbook for Class XI and XII (Zoology section), Chapter: Human Physiology - Digestion, Respiration, Circulation, Neural Control and Chemical Coordination, Topic: Organ system functions and hormonal regulation.
The parasympathetic nervous system promotes relaxation, digestion, and energy conservation. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Ref: NCERT Biology Textbook for Class XI and XII (Zoology section), Chapter: Human Physiology - Digestion, Respiration, Circulation, Neural Control and Chemical Coordination, Topic: Organ system functions and hormonal regulation.
Myelin acts as an insulating layer around axons, allowing faster transmission of nerve impulses through saltatory conduction. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Ref: NCERT Biology Textbook for Class XI and XII (Zoology section), Chapter: Biology - Zoology portion covering relevant system and function.
Tunicate embryos at the eight-cell stage exhibit predominantly autonomous development, as dissociated blastomere pairs still differentiate into most tissues normally derived from them, reflecting segregation of determinants like macho-1 for muscle. However, notochord and nervous system lineages deviate from this rule, failing to form in isolation and requiring cell-cell interaction between animal and vegetal partners. Inductive signals involving FGF and BMP antagonism from presumptive notochord precursors influence neighboring ectoderm. Therefore most lineages demonstrate autonomous specification, while notochord and neural fate exemplifies conditional specification dependent on extrinsic instructive communication for proper induction.
Ref: Gilbert, Developmental Biology, 12th ed., Chapter 4: Tunicates and Conditional Specification of Notochord.
Afferent neurons (sensory neurons) carry impulses from sensory receptors to the CNS.
Ref: NCERT Class 11 Biology Chapter 18: Neural Control and Coordination Sensory Organs - Ear - Structure and Physiology of Hearing and Balance
Acetylcholine is the primary neurotransmitter that facilitates communication at neuromuscular junctions, triggering muscle contraction.
Ref: NCERT Class 11 Biology Chapter 18: Neural Control and Coordination Sensory Organs - Ear - Structure and Physiology of Hearing and Balance
The medulla oblongata controls involuntary functions such as heart rate, respiration, and digestion.
Ref: NCERT Class 11 Biology Chapter 18: Neural Control and Coordination Sensory Organs - Ear - Structure and Physiology of Hearing and Balance
Baroreceptors, found in the walls of arteries, detect changes in blood pressure and help regulate it.
Ref: NCERT Class 11 Biology Chapter 18: Neural Control and Coordination Sensory Organs - Ear - Structure and Physiology of Hearing and Balance
The cerebellum is responsible for coordinating voluntary movements, balance, and posture.
Ref: NCERT Class 11 Biology Chapter 18: Neural Control and Coordination Sensory Organs - Ear - Structure and Physiology of Hearing and Balance
The limbic system plays a key role in emotions, motivation, learning, and memory.
Ref: NCERT Class 11 Biology Chapter 18: Neural Control and Coordination Sensory Organs - Ear - Structure and Physiology of Hearing and Balance
