Upon arriving in your anatomy lab, you drop your pencil. Identify the muscle that allows for flexion of the vertebral column, allowing you to bend at the waist to retrieve the pencil
A) transversus abdominis
B) external oblique
C) internal oblique
D) rectus abdominis
D
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In mammals, heart size tends to be proportional to body weight while heart rate is inversely proportional to body weight. What is the most probable explanation for pygmy shrews having unusually large hearts but an unusually slow heart rate?
A) Pygmy shrews are very active so they need large hearts. B) It is possible that the heart rate of shrews has reached its absolute limitation, so a large heart can pump more blood with each beat. C) Since pygmy shrews are tiny, their heart size differs from other mammals and their heart rate is slow when they are at rest. D) The heart size of pygmy shrews varies depending on latitude.
Why can we say that a cell without a nucleus will ultimately die?
What will be an ideal response
Which of the following is true about red muscles?
A) Red muscles are slower than white muscles. B) Red muscles have fewer mitochondria than white muscles. C) Red muscles have fibers of greater diameter than those of white muscles. D) Red muscles contain less myoglobin than white muscles. E) Red muscles fatigue quickly.
An increase in cardiac sympathetic activity ____________________ the velocity of impulse conduction through the heart
Fill in the blank(s) with correct word