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humphsiology

QuestionAnswer
What triggers a ligand-gated ion channel to open? Binding of a specific ligand, usually a neurotransmitter.
What type of ion movement do ligand-gated ion channels allow? Rapid movement of ions such as sodium, potassium, calcium, or chloride across the membrane.
Which neurotransmitter activates nicotinic receptors at the neuromuscular junction? Acetylcholine.
Are ligand-gated ion channels fast acting or slow acting? Fast acting.
What is the main function of ligand-gated ion channels in the nervous system? To create quick electrical signals for communication between neurons and muscles.
Where does carbohydrate digestion begin? In the mouth with salivary amylase.
What is the main site of nutrient absorption in the body? The small intestine.
What role does bile play in fat digestion? It emulsifies fats, breaking them into smaller droplets for easier enzyme action
Which organ produces most digestive enzymes used in the small intestine? The pancreas.
What nutrient type enters the lymphatic system instead of directly entering the bloodstream? Fats (as chylomicrons).
What happens to the diaphragm during inhalation? It contracts and moves downward.
When the thoracic cavity expands, what happens to lung pressure? Lung pressure decreases, allowing air to flow in.
Which lung volume represents the amount of air inhaled or exhaled during normal breathing? Tidal volume.
Created by: sselles80
 

 



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