Neurons and Muscle Tissue Quiz

What is the role of neuroglia in nervous tissue?

• Unable to regenerate

• Support and protect neurons

Answer explanation

Neuroglia, or glial cells, play a crucial role in supporting and protecting neurons. They provide structural support, maintain homeostasis, and facilitate communication within the nervous system, making them essential for neuronal health.

Which type of muscle tissue is activated by the brain or hormones?

• Nervous

• Cardiac

Answer explanation

Cardiac muscle tissue is involuntary and is activated by the brain and hormones, allowing it to respond to the body's needs. Nervous tissue does not contract; it transmits signals. Thus, the correct answer is Cardiac.

What is a characteristic of skeletal muscle tissue?

• Controlled by somatic nervous system

• Contracts involuntarily

Answer explanation

Skeletal muscle tissue is controlled by the somatic nervous system, allowing for voluntary movement. In contrast, involuntary contractions are characteristic of smooth and cardiac muscle tissues.

What is the ability of neuroglia after injury?

• Able to regenerate

• Convert stimuli into nerve impulses

Answer explanation

Neuroglia, or glial cells, have the ability to regenerate after injury, supporting the repair and maintenance of the nervous system. They do not convert stimuli into nerve impulses, which is a function of neurons.

Which type of muscle tissue is striated and contracts involuntarily?

• Cardiac

• Smooth

Answer explanation

Cardiac muscle tissue is striated and contracts involuntarily, making it essential for heart function. In contrast, smooth muscle is non-striated and also involuntary, but it does not have the striations characteristic of cardiac muscle.

What is the function of neurons in terms of impulse transmission?

• Regenerate after injury

• Pass impulses to other neurons, muscle fibers, or glands

Answer explanation

Neurons are specialized cells that transmit impulses. They pass these impulses to other neurons, muscle fibers, or glands, facilitating communication within the nervous system, which is essential for bodily functions and responses.

What is the regeneration capability of neurons?

• Unable to regenerate

• Convert stimuli into nerve impulses

Answer explanation

Neurons have a limited ability to regenerate. Unlike some other cell types, mature neurons in the central nervous system are generally unable to regenerate after injury, making 'Unable to regenerate' the correct choice.

What percentage of all nerve cells do neurons make up?

• 50%

• 10%

Answer explanation

Neurons make up about 10% of all nerve cells in the nervous system. The remaining 90% consists of glial cells, which support and protect neurons.

Which type of muscle tissue contracts voluntarily?

• Skeletal

• Neuroglia

Answer explanation

Skeletal muscle tissue is the only type of muscle that contracts voluntarily, allowing for conscious control of movement. Neuroglia, on the other hand, are supportive cells in the nervous system and do not contract.

What is a characteristic of cardiac muscle tissue?

• Contracts voluntarily

• Striated and contracts involuntarily

Answer explanation

Cardiac muscle tissue is striated, meaning it has a banded appearance, and it contracts involuntarily, which distinguishes it from skeletal muscle that contracts voluntarily.