Please help as this is so confusing tome!
25. In addition to the nucleus, cytoplasm, and cell membrane, a single neuron possesses
A. one dendrite and several axons.
B. several dendrites and one axon.
C. many nuclei and one neurilemma.
D. one nucleus and many neurilemma.
To determine the correct answer, let's break down the question and analyze the given options.
The question is asking about the additional structures present in a single neuron, apart from the nucleus, cytoplasm, and cell membrane.
Let's go through each option:
A. One dendrite and several axons.
This option suggests that a single neuron has one dendrite and multiple axons. However, in reality, a single neuron typically possesses multiple dendrites and only one axon. So, this option is not correct.
B. Several dendrites and one axon.
This option suggests that a single neuron has multiple dendrites and one axon. This is the correct configuration as most neurons have several dendrites that receive incoming signals and one axon that transmits outgoing signals, making option B the correct answer.
C. Many nuclei and one neurilemma.
This option suggests that a single neuron has many nuclei and one neurilemma. However, neurons typically contain only one nucleus, not multiple nuclei. Therefore, this option is not correct.
D. One nucleus and many neurilemma.
This option states that a single neuron has one nucleus and multiple neurilemma. However, neurilemma refers to the outermost covering of peripheral nerves, not a structure found within a neuron. Hence, this option is not correct.
To summarize, the correct answer is option B: several dendrites and one axon.