Question

QUESTION 1 How are the nervous systems of a flatworm and a fish different? One responds to stimuli in the environment and the other does not. One has nerve cells with axons and the other does not. One is a loose network of connected neurons without centers of integration, and one has ganglia in which integration can occur. One has a brain with a forebrain, a midbrain, and a hindbrain, and the other has ganglia in which integration can occur. 2 points QUESTION 2 Which organism has a central brain? fish flatworm sponge hydra 2 points QUESTION 3 Which organism is able to form organized patterns of behavior through the process of integration because it has ganglia? grasshopper shark mouse flatworm 2 points QUESTION 4 What moves across axons? electrons ions electrons and ions neither electrons nor axons 2 points QUESTION 5 Which of the following is part of the peripheral nervous system? spinal cord sensors brain all of the above

Answer 1

Answer: Q1. One has a brain with a forebrain, a midbrain, and a hindbrain, and the other has ganglia in which integration can occur.

Q2. Fish

Q3. Flatworm

Q4. Ions

Q5. Sensors

Explanation:

Q1. Flatworms

• Their nervous system is ladder like.

• At the head region, there are two simple brain like structures, which are called ganglia.

Fish has a brain, with a forebrain, a midbrain, and a hindbrain.

Q2.

Sponges are the only multicellular animals without a nervous system

The hydra has a nervous system characterized by a nerve net.

The flatworm brain contains two lobes, along with a nerve cell-containing cortex and a base of nerve fibers. This called a system of cephallization, a term used to describe the sensory network of the head and brain

Fish have extremely advanced nervous systems organized around a brain. Fish brains have rare clearly visible parts.

Q3. Only the flatworm had the ganglia.

Q4. In vertebrates, that typically conducts electrical impulses (ions) known as action potentials away from the nerve cell body. The function of the axon is to transmit information to different neurons, muscles, and glands.

Q5. The peripheral nervous system refers to parts of the nervous system outside the brain and spinal cord. It includes the cranial nerves, spinal nerves and their roots and branches, peripheral nerves, and neuromuscular junctions.

Answer 2

1, One has a brain, with a forebrain, a midbrain, and a hindbrain, the other has ganglia which integration can occur

2, fish

3, flatworm

4, ions

5, sensors