Question

Question 1 (1 point)
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Which statement best describes the role of the lung in gas exchange?

Question 1 options:

It takes in oxygen from the bloodstream


It produces oxygen as a waste product of cellular respiration


It extracts oxygen from the atmosphere for use by body cells


It provides carbon dioxide to the capillaries

Question 2 (1 point)
Which part of the nervous system takes in information from the environment?

Question 2 options:

sensory receptors


brain


spinal cord


motor neurons

Question 3 (1 point)
Which outcome could be the goal of a negative feedback loop?

Question 3 options:

to enhance an action of a stimulus


to release hormones


to signal receptors to take in sensory information


to return a substance to a normal level

Question 4 (1 point)
Which option describes a positive feedback mechanism?

Question 4 options:

producing clotting factors in response to a cut


producing the hormone glucagon to increase blood sugar


producing the hormone insulin to lower blood sugar


producing gastric enzymes when food is in the stomach

Question 5 (1 point)
Which statement about the nervous system is correct?

Question 5 options:

The brain and spinal cord make up the PNS


The PNS consists entirely of sensory neurons


The autonomic system has parasympathetic and sympathetic divisions


The somatic system is a part of the sensory division

Answer 1

Here are the answers to your questions:

**Question 1:**
Which statement best describes the role of the lung in gas exchange?
**Answer:** It extracts oxygen from the atmosphere for use by body cells.

**Question 2:**
Which part of the nervous system takes in information from the environment?
**Answer:** sensory receptors.

**Question 3:**
Which outcome could be the goal of a negative feedback loop?
**Answer:** to return a substance to a normal level.

**Question 4:**
Which option describes a positive feedback mechanism?
**Answer:** producing clotting factors in response to a cut.

**Question 5:**
Which statement about the nervous system is correct?
**Answer:** The autonomic system has parasympathetic and sympathetic divisions.

Feel free to ask if you have more questions!