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Davyd B.

Midterm

QuestionAnswer
What ion is released from the sarcoplasmic reticulum to trigger muscle contraction? Calcium (Ca²⁺).
What principle states that a neuron fires completely or not at all once threshold is reached? The all-or-none principle.
Which nervous system division is responsible for “rest and digest” functions? Parasympathetic nervous system.
Which endocrine gland releases T3 and T4 to regulate metabolism? Thyroid gland.
What hormone raises blood calcium levels by stimulating bone resorption? Parathyroid hormone (PTH).
What is the primary function of the lymph nodes? Filtration of lymph and immune cell activation.
Which cells produce surfactant in the alveoli to prevent collapse? Type II alveolar cells.
What is tidal volume? The amount of air inhaled/exhaled during a normal breath.
What structure is primarily responsible for nutrient absorption in the small intestine? Villi and microvilli.
What type of immunity does a newborn receive through breast milk? Naturally acquired passive immunity.
Created by: user-1988187
 

 



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