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Kathryn Thomas

SCI 221-Week 14-Assignment StudyStack 2

QuestionAnswer
What is the primary function of the sympathetic nervous system during stress? It activates the fight or flight response, increasing heart rate, respiration, and alertness.
Which neurotransmitter is mainly associated with the parasympathetic nervous system? Acetylcholine
Homeostasis The body’s ability to maintain a stable internal environment despite external changes.
Which part of the brain controls heart rate, blood pressure, and breathing? The medulla oblongata.
Reflex Arc The neural pathway that controls a reflex action, involving a receptor, sensory neuron, interneuron, motor neuron, and effector.
How do stretch receptors in the stomach signal fullness? They send afferent signals to the brain when the stomach walls expand.
Myelin Sheath A protective covering that speeds up nerve impulse transmission along the axon.
Which division of the nervous system includes sensory input and motor output to skeletal muscles? The somatic nervous system.
What is synaptic transmission? The process of sending signals from one neuron to another across the synapse using neurotransmitters.
Autonomic Nervous System (ANS) The involuntary division of the nervous system responsible for regulating internal organs.
What happens to digestive activity when the sympathetic nervous system is activated? Digestion slows down because blood flow is redirected to essential organs like the heart and muscles.
The parasympathetic division is often called the “________ and ________” system. Rest and digest.
What is the main function of the thyroid gland? It regulates metabolism, body heat, and energy levels through thyroid hormones.
Adrenal Medulla The inner part of the adrenal gland that releases epinephrine and norepinephrine during stress.
The process of producing sperm in males is known as ____________. Spermatogenesis.
The smallest blood vessels where nutrients and gases are exchanged are the ___________ Capillaries.
Created by: Kathrynt7924
 

 



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