________ = respiratory rate × (tidal volume - anatomic dead space)
A) Vital capacity
B) Respiratory minute volume
C) Pulmonary ventilation rate
D) Alveolar ventilation rate
E) External respiration rate
D
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________ is a protein-digesting enzyme in pancreatic juice.
A. Nuclease B. Trypsin C. Pancrease D. Amylase
Why are you able to repeatedly contract and relax your muscles of respiration, allowing you to breathe in and breathe out?
a. As soon as all of the Ca2+ stored in the lateral sacs of the sarcoplasmic reticulum is used up, muscle relaxation occurs. b. After the muscle cell becomes excited, acetylcholinesterase rapidly destroys acetylcholine. c. When there is no longer a local action potential in the muscle cell, Ca2+ is actively transported back into the lateral sacs of the sarcoplasmic reticulum, and muscle relaxation occurs. d. Both (b) and (c) above. e. All of these answers.
Freshwater animals have more NaCl in the ECF and little or no amino acid osmolyes in the ICF
Indicate whether the statement is true or false
Which neurotransmitter is released at the postganglionic synapse of sympathetic nerves?
a. acetylcholine b. epinephrine c. dopamine d. mu