Describe several reasons why blood flows more slowly in capillaries than in arteries?
What will be an ideal response?
When blood first leaves the heart, it enters large arteries and is traveling very quickly. By the time it
reaches the capillary level, it is like traffic that goes from a large superhighway down to many small
one-way roads. In addition, the blood must travel more slowly in capillaries to allow for adequate gas
exchange to occur. If blood entered the capillary network at the same speed and force that it travels in
arteries, the individual capillaries would burst.
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Match the plant process or characteristic with the location in which it occurs in the cell.
A) inner membrane of mitochondria B) nucleolus C) matrix of mitochondria D) Golgi complex E) cytoplasm F) intermembrane space of mitochondria G) extracellular space H) outer membrane of mitochondria I) porins J) ribosome 1) glycolysis 2) TCA cycle 3) phospholipid synthesis 4) nucleotide phosphorylation 5) electron transport
In honeybees, if food is closer than 50 m, scouts
A. look for other food. B. do not perform a dance. C. perform a waggle dance about the food's location. D. perform a round dance about predation risk. E. perform a round dance about the food's proximity.
Two populations that have been separated by a river are most likely to become separate species if
A) fur color is different in the two populations. B) genes controlling ear development become different so that members of one population have much longer ears than the other. C) genes controlling molecules on the surface of the sperm that bind with egg receptors are different in the two populations. D) feeding habits are different in the two populations.
Kinesis is
A. a nondirectional movement in response to a stimulus B. a movement away from a stimulus. C. a movement toward a stimulus. D. the cessation of movement in response to a stimulus E. movement due to associative learning