Nerve and Blood Cells

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Questions and Answers

What is the primary function of a nerve cell (neuron)?

To produce hormones for bodily functions.
To digest and absorb nutrients.
To transport oxygen throughout the body.
To conduct electrical impulses from one part of the body to another. (correct)

Which structural adaptation enables neurons to collect impulses from neighboring cells?

Dendrites. (correct)
Nodes of Ranvier.
Synaptic knob.
Axon.

What role does the axon play in the function of a neuron?

It protects the cell body from damage.
It regulates the neuron's metabolism.
It carries impulses from one neuron to another. (correct)
It synthesizes proteins for the neuron.

The synaptic knob forms which crucial structure for neuronal communication?

A link with other neurons, facilitating signal transmission. (C) Signup and view all the answers

What is the functional advantage of the Nodes of Ranvier in a neuron?

They speed up the transmission of impulses. (A) Signup and view all the answers

Which part of the neuron houses the nucleus and cytoplasm?

Cell body. (B) Signup and view all the answers

Which of the following is NOT an adaptation of nerve cells for their function?

Presence of a large vacuole for water storage. (B) Signup and view all the answers

What is the main function of red blood cells?

Transporting oxygen. (C) Signup and view all the answers

Which adaptation of red blood cells facilitates efficient oxygen diffusion?

Biconcave shape. (A) Signup and view all the answers

What component within red blood cells is responsible for combining with oxygen?

Hemoglobin. (D) Signup and view all the answers

What do red blood cells transport away from the tissues, in addition to transporting oxygen to them?

Carbon dioxide. (C) Signup and view all the answers

Why is the absence of a nucleus an advantage for red blood cells?

It provides more space for hemoglobin and oxygen transport. (A) Signup and view all the answers

Which cellular component is primarily responsible for carrying electrical impulses in a neuron?

The axon. (D) Signup and view all the answers

How does the presence of synaptic knobs improve neuronal function?

By facilitating communication with other neurons. (C) Signup and view all the answers

What is the significance of the biconcave shape of a red blood cell for gas exchange?

It increases the surface area-to-volume ratio for efficient diffusion. (B) Signup and view all the answers

In terms of adaptations, how do red blood cells and nerve cells differ significantly?

Red blood cells lack a nucleus; nerve cells have dendrites and axons. (C) Signup and view all the answers

How does the absence of certain organelles in red blood cells, such as the nucleus, affect its function?

It maximizes space for hemoglobin, thus increasing oxygen-carrying capacity. (D) Signup and view all the answers

Nerve cells transmit signals over long distances. How does the presence of Nodes of Ranvier aid in this process?

By enabling saltatory conduction, speeding up impulse transmission. (D) Signup and view all the answers

What would be the likely effect on a neuron's function if its dendrites were significantly reduced in size or number?

It would reduce the neuron's ability to receive signals from other neurons. (B) Signup and view all the answers

If red blood cells were spherical rather than biconcave, how might their function be affected?

Their surface area for gas exchange would decrease, reducing efficiency. (D) Signup and view all the answers

Flashcards

Function of nerve cell

To conduct electrical impulses (nerve impulses) from one part of the body to another.

Cell body

Part of the neuron having the nucleus and cytoplasm.