Using external features, briefly describe how you can determine the difference between a male and a female fetal pig
What will be an ideal response?
Female pigs have a triangular-shaped urogenital papilla anterior to
the anus while male fetal pigs have a penile opening just posterior to the base of the
umbilical cord and a scrotal sac under the tail.
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The ________ is the amount of blood in a ventricle after it has contracted and before it begins to refill.
Fill in the blank(s) with the appropriate word(s).
Parasympathetic activation of sweat glands occurs to help reduce body temperatures
Indicate whether the statement is true or false
Which of the following has been shown to be associated with how long an animal might be expected to live (lifespan)?
a. the amount of RNAi in cells b. the number of pseudogenes c. the amount of junk DNA d. the length telemeres e. none of these has been found to have any effect on the lifespan of an organism.
Parasympathetic and sympathetic influence on heart rate is controlled by reflexes.
Answer the following statement true (T) or false (F)