QUESTION 1 A difference between the nervous system and the endocrine system is:

Question

QUESTION 1

A difference between the nervous system and the endocrine system is:

the function of the nervous system cell-to-cell communication while the function of the endocrine system is to regulate hormones.

The endocrine system uses chemical signals and receptors to facilitate cell-to-cell communication while the nervous system doesn't.

The signalling done by the nervous system is much faster and specific than that of the endocrine system.

All of the above are true.

None of the above is true.

QUESTION 2

The surface area of the human lungs...

is not large enough to keep up with the oxygen demands of the human body.

is not too important since gas exchange (moving oxygen into the blood and carbon dioxide out of the blood), takes place only in the trachea.

is about the same size as that of a human's skin.

is very large because of all of the millions of little air sacs, called alveoli, which make up the lungs.

is about the same size as a ten football fields.

QUESTION 3

The function of the respiratory system is:

to allow gas exchange between the environment and our bodies.

to put carbon dioxide into the blood.

to take oxygen out of the blood.

to breathe in air in order to help cool our bodies.

QUESTION 4

When your diaphragm contracts, your thoracic cavity ________, causing you to ________.

gets larger; inhale

gets larger; exhale

gets smaller; inhale

doesn't change size; exhale

gets smaller; exhale

QUESTION 5

Which of the following statements is true?

Air consists mostly of oxygen.

The concentration of carbon dioxide in the air is larger than in the blood, which causes carbon dioxide to move from the alveoli to the blood.

The reason that our lungs expand when we breathe is because air is coming into them.

As the volume of a chest cavity increases, the pressure within it decreases.

When we inhale, the path that air follows is: the nasal cavity, bronchi, larynx, trachea, sinuses, and finally the alveoli.

QUESTION 6

Which of the following is a true statement?

The nucleus of a neuron is found in the synaptic terminal.

The purpose of the dendrites of a neuron is to release a chemical signal if the axon sends an electrical impulse.

The chemical signals released by neurons are called hormones.

There are only two basic types of neurons: sensory neurons (which detect stimuli) and motor neurons (which communicate with muscles).

The axon of a neuron transmits an electrical impulse to the synaptic terminal.

the function of the nervous system cell-to-cell communication while the function of the endocrine system is to regulate hormones.

The endocrine system uses chemical signals and receptors to facilitate cell-to-cell communication while the nervous system doesn't.

The signalling done by the nervous system is much faster and specific than that of the endocrine system.

All of the above are true.

None of the above is true.

Explanation / Answer

1. Answer : The signalling done by the nervous system is much faster and specific than that of the endocrine system.

Endocrine and nervous system, both uses chemical messengers for communication.via receptors. Endocrine system uses hormones while nervous system uses neurotransmitters.

2. Answer : is very large because of all of the millions of little air sacs, called alveoli, which make up the lungs.

Each lung contains 300 million alveoli and if stretched out they’d cover a football field.

3. Answer : to allow gas exchange between the environment and our bodies. We breath in oxygen and breath out carbon dioxide so lungs is the exchange point to get oxygen from the atmosphere and to eliminate carbon dioxide from the body.

4. Answer : gets smaller; exhale

When we inhale thoracic cavity becomes larger

5. Answer : As the volume of a chest cavity increases, the pressure within it decreases and The reason that our lungs expand when we breathe is because air is coming into them.

6. Answer : The axon of a neuron transmits an electrical impulse to the synaptic terminal.

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