The peripheral nervous system (PNS) transmits information to and from the central nervous system (CNS) and plays a role in regul
ating an animal's movements and internal environment. Determine which of the following statements about the PNS are true. Select all that apply.a.Stimulating the organs of digestion is a parasympathetic response.b.The autonomic nervous system controls the action of skeletal muscle.c.The sympathetic and parasympathetic divisions consist of afferent neurons.d.Parasympathetic nerves are associated with the cranial and sacral regions of the spinal cord, whereas sympathetic nerves are associated with the thoracic and lumbar regions.e.The sympathetic division amplifies the effects of the parasympathetic division.f.Neurons in the parasympathetic division release neurotransmitters that act on receptors that slow heart rate.g.The sympathetic division of the PNS prepares the body for physical exertion in stressful situations.
a. Stimulating the organs of digestion is a parasympathetic response.
d. Parasympathetic nerves are associated with the cranial and sacral regions of the spinal cord, whereas sympathetic nerves are associated with the thoracic and lumbar regions.
f. Neurons in the parasympathetic division release neurotransmitters that act on receptors that slow heart rate.
g. The sympathetic division of the PNS prepares the body for physical exertion in stressful situations.
Sea stars (or starfish) feed off the oyster beds. If the oyster beds were destroyed it would deplete the major food source of the sea stars and they would begin to diminish.
Gametogenesis is the formation of gametes. Formation of sperms also called spermatogenesis takes place in the testes while formation of eggs also called oogenesis takes place in the ovary. Oogenesis in females begins before birth, however maturation of the eggs take a very long time and is only complete after fertilization. In males sperm formation only occurs after puberty.
