Solution A increases its acidity. This means that the
A. pH of the solution has increased.
B. number of hydrogen ions has increased.
C. solution is closer to neutrality.
D. solution will now accept more protons.
E. number of hydrogen ions has decreased.
B
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Answer the following statements true (T) or false (F)
1. Muscle spasms of the back often are due to the erector spinae contraction. 2. Muscles connecting to the hyoid bone are important for swallowing and speech. 3. The muscles of facial expression insert into skin or other muscles, not bones. 4. Once a motor neuron has fired, all the muscle fibers in a muscle contract. 5. The thin filaments (actin) contain a polypeptide subunit G actin that bears active sites for myosin attachment.
Normal heart sounds are caused by which of the following events?
A) friction of blood against the chamber walls B) closure of the heart valves C) opening of the heart valves D) excitation of the sinoatrial (SA) node
Define temporal and spatial summation. Where does the summation occur? Are these processes mutually exclusive, or can they occur at the same time in a typical multipolar neuron? What key property of neurons do these forms of summation demonstrate?
What will be an ideal response?
Which muscles contract when inhaling deeply?
A. Internal intercostals B. External obliques C. Erector spinae D. Transversus abdominis E. External intercostals