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vampirchik [111]
3 years ago
12

Which of the following is true about sponges and placozoans?

Biology
1 answer:
Nastasia [14]3 years ago
4 0

Answer:

I am not sure but I think the answer is of last one.

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PLEASE HELP ITS URGENT What is the functionof the peripheral nervous system? A. To transmit signals between the body and the bra
Rzqust [24]

Answer:

The peripheral nervous system (PNS) is one of the two components of the nervous system, the other part is the central nervous system (CNS). The PNS consists of the nerves and ganglia outside the brain and spinal cord.[1] The main function of the PNS is to connect the CNS to the limbs and organs, essentially serving as a relay between the brain and spinal cord and the rest of the body.[2] Unlike the CNS, the PNS is not protected by the vertebral column and skull, or by the blood–brain barrier, which leaves it exposed to toxins and mechanical injuries. The peripheral nervous system is divided into the somatic nervous system and the autonomic nervous system. In the somatic nervous system, the cranial nerves are part of the PNS with the exception of the optic nerve(cranial nerve II), along with the retina. The second cranial nerve is not a true peripheral nerve but a tract of the diencephalon.[3]Cranial nerve ganglia originated in the CNS. However, the remaining ten cranial nerve axons extend beyond the brain and are therefore considered part of the PNS.[4] The autonomic nervous system is an involuntary control of smooth muscle and glands. The connection between CNS and organs allows the system to be in two different functional states: sympathetic and parasympathetic

Explanation:

3 0
3 years ago
One way to learn more about how healthy brains work is to
pshichka [43]

Answer:

A nerve cell, or neuron, is a cell that receives information from other nerve cells or are sculpted in other ways, for example, to allow one to see patterns. these “acrobats” became very good at the task over a month or so of practice.

Explanation:

7 0
3 years ago
Description of Vegetative​
marishachu [46]

Answer:

Vegetation def is: growing plants, or a life without physical, mental or social activity

Vegetative depends on the context. Mainly just means without brain activity

7 0
2 years ago
We have talked about the central and peripheral nervous systems. We know that the peripheral nervous system relays signals to an
JulsSmile [24]

Answer:

  1. The peripheral nervous system has - Somatic nervous system and Autonomic nervous system.
  2. These systems control our body action by this controls all the types of muscles.

Explanation:

  • Somatic nervous system have -  Cranial nerves and  Spinal nerves
  • Autonomic nervous system have -   Sympathetic and  Parasympathetic  system.
  • The somatic nervous system controls our voluntary and involuntary actions by cranial and spinal nerves and controls all three types of muscles such as cardiac, smooth and skeletal.
  • The autonomic nervous system controls the involuntary actions of our internal organs.
  • The sympathetic and parasympathetic system relates to all types of muscle.
  • The sympathetic and parasympathetic system accelerates and decelerates the heart beat respectively, by this controls the cardiac muscle.
  • The sympathetic and parasympathetic system stimulates and relaxes our internal organs respectively, by this controls the smooth muscles.
  • The sympathetic and parasympathetic system prepares our body as a whole for a action and also relaxes our whole body respectively, by this controls the skeletal muscles.

5 0
3 years ago
Vascular plants transport water and nutrients to all parts of the plant through-
earnstyle [38]

Answer:

option c

Explanation:

Vascular plants transport water and nutrients using the vascular bundles, xylem and phloem. Xylem transports the former and phloem the latter

5 0
3 years ago
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