Question

44 multiple choice 2 points
a sodium potassium pump utilizes ____ to eject __ and recaptures ____.
3 sodium ions, 2 potassium ions, 1 atp molecule
2 sodium ions, 2 potassium ions, 2 atp molecules
2 atp molecules, 2 sodium ions, 2 potassium ions
1 atp molecule, 3 sodium ions, 2 potassium ions

45 true or false 2 points
the sympathetic division of the nervous system is mobilized in the body during an emergency, such as unexpectedly encountering a bear.
true
false

46 multiple choice 2 points
which type of connective tissue fiber allows for the stretch and recoil of large arterial walls and the walls of bronchi?
dense irregular
elastic
dense regular
reticular
adipose

Explanation:

Analyze Question 44

The sodium-potassium pump (\(\text{Na}^+/\text{K}^+\) ATPase) hydrolyzes \(1\) molecule of ATP to actively transport \(3\) sodium ions (\(\text{Na}^+\)) out of the cell (eject) and \(2\) potassium ions (\(\text{K}^+\)) into the cell (recapture).

• Blank 1: \(1\) ATP molecule
• Blank 2: \(3\) sodium ions
• Blank 3: \(2\) potassium ions

This matches the fourth option.

Analyze Question 45

The sympathetic division of the autonomic nervous system is responsible for the "fight-or-flight" response, which is mobilized during stressful or emergency situations (such as encountering a bear).

• Statement is True.

Analyze Question 46

Elastic fibers (made of elastin) allow tissues to stretch and recoil. They are prominent in the walls of large arteries (like the aorta) and the bronchial tubes of the lungs to accommodate pressure changes and volume changes.

• Correct tissue fiber: Elastic.

Answer:

Question 44

• 3 sodium ions, 2 potassium ions, 1 ATP molecule
• 2 sodium ions, 2 potassium ions, 2 ATP molecules
• 2 ATP molecules, 2 sodium ions, 2 potassium ions
• 1 ATP molecule, 3 sodium ions, 2 potassium ions (Correct answer)

Question 45

• True (Correct answer)
• False

Question 46

• Dense Irregular
• Elastic (Correct answer)
• Dense Regular
• Reticular
• Adipose