What might account of a lack of massive flexor muscles?
What will be an ideal response?
The vertebral column does not need a massive series of flexor muscles because (1 ) many of the large trunk muscles flex the vertebral column when they contract, and (2 ) most of the body weight lies anterior to the vertebral column, so gravity tends to flex the spine.
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Catabolism builds up molecules and anabolism breaks down molecules.
Answer the following statement true (T) or false (F)
Muscles that produce precise, delicate movements have fewer muscle fibers in their motor units compared to muscles made for powerful movements
a. True b. False Indicate whether the statement is true or false
Hemoglobin is crucial for oxygen transport in the blood because oxygen has a ________ solubility coefficient in water.
A. low B. high
When do the accessory respiratory muscles become active?
A. The muscles of expiration are the abdominal and diaphragm muscles. B. The muscles of expiration are the abdominal and internal intercostals muscles. C. The muscles of expiration are the external and internal intercostals muscles. D. Exhalation is a passive process and does not require the action of any muscles