These interactive flashcards help IB Sports, exercise and health science (SEHS - Old) students Standard Level (SL) and Higher Level (HL) quickly review and memorize the essential definitions, formulas, and terms needed for success in IB Exams. Each card focuses on A.1—Communication and is aligned with the IB Sports, exercise and health science (SEHS - Old) syllabus, ensuring focused revision on core principles, advanced applications, and practical problem-solving. Students can test themselves anytime, anywhere, perfect for reinforcing tricky concepts, learning IB terminology, and committing formulas to memory. By using RevisionDojo's flashcards consistently, learners turn repetition into mastery and enter the exam with confidence.
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What are the two main components of the nervous system?
What are the two main components of the nervous system?
What is the function of the Central Nervous System (CNS)?
The CNS processes incoming information and sends out instructions to regulate responses.
What is the role of the Peripheral Nervous System (PNS)?
The PNS connects the CNS to the rest of the body and carries sensory information to the CNS and motor commands from the CNS.
What are the two divisions of the efferent (motor) PNS?
What does the somatic nervous system control?
Voluntary movements by sending signals to skeletal muscles.
What are the two branches of the autonomic nervous system (ANS)?
What is the function of the sympathetic division of the ANS?
Prepares the body for 'fight or flight' responses.
What is the function of the parasympathetic division of the ANS?
Promotes 'rest and digest' activities.
What are proprioceptors?
Sensors that detect changes in body position and movement.
What is the role of baroreceptors?
They monitor blood pressure.
What is the function of chemoreceptors?
They detect changes in chemical levels, such as oxygen and carbon dioxide.
How does the nervous system respond to changes?
Quickly, through direct neural communication.
How does the endocrine system respond to changes?
Slower, by releasing hormones into the bloodstream.
What is homeostasis?
The maintenance of a stable internal environment.
What mechanism does the body primarily use to maintain homeostasis?
Negative feedback mechanisms.
Give an example of negative feedback in homeostasis.
Blood pH regulation: chemoreceptors detect changes in pH and adjust breathing rate.
What factors can influence homeostatic regulation?
How do the nervous and endocrine systems work together during exercise?
The sympathetic ANS increases heart rate, while hormones like epinephrine mobilize energy and negative feedback mechanisms regulate imbalances.
What is the difference between negative feedback and positive feedback?
Negative feedback stabilizes variables, while positive feedback amplifies changes.
Name a key hormone released by the adrenal glands during stress.
Epinephrine (adrenaline).
What is the role of insulin and glucagon?
Insulin lowers blood sugar, while glucagon raises it by stimulating glucose release.
What is the effect of the nervous system compared to the endocrine system?
Nervous system responses are fast and immediate, while endocrine responses are slower but have lasting effects.