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Hypocalcemia, or low calcium levels in the blood, can lead to various physiological disturbances, including notable effects on the respiratory system. One of the key respiratory effects is laryngeal spasm, which can result in difficulty breathing or even apnea, as the muscles around the larynx tighten and restrict airflow. This laryngeal spasm is a direct result of the neuromuscular excitability that occurs when calcium levels drop, potentially leading to a serious breathing emergency.

Additionally, bronchospasm can also be associated with hypocalcemia. This is due to the heightened sensitivity of the airways and bronchial tissues, which may react excessively to stimuli in states of low calcium. This bronchial constriction can further complicate breathing and can manifest as wheezing or shortness of breath.

Given that each of these respiratory effects—apnea, laryngeal spasm, and bronchospasm—are recognized complications of hypocalcemia, the comprehensive understanding of the topic shows that all listed respiratory effects are indeed interconnected outcomes of electrolyte imbalances. Therefore, the correct conclusion encompassing all the described symptoms is that all of the above effects are associated with hypocalcemia.